:root {
    --primary: #3977ff;
    --primary-50: #f2f2f7;
    --primary-100: #f7f7fe;
    --primary-200: #e6f0ff;
    --primary-300: #255ede;
    --primary-400: #1D4099;
    --primary-500: #122E66;
    --sec-1: #40c4ff;
    --sec-2: #9c88ff;
    --sec-3: #ffd54f;
    --sec-4: #f0f2f5;
    --accent-1: #fd8123;
    --accent-2: #ff5722;
    --accent-3: #ffebe6;
    --n1: #1A1B2E;
    --n2: #374151;
    --n3: #4B5563;
    --n4: #6B7280;
    --n5: #E5E7EB;
    --n6: #ffffff;
    --success: #00b42a;
    --success-bg: #e6ffef;
    --warning: #ff7d00;
    --warning-bg: #fff3e0;
    --error: #f53f3f;
    --error-bg: #ffe0e0;
    --font: 'Microsoft YaHei', 'Source Han Sans CN', 'Helvetica', 'Arial', 'Tahoma', sans-serif;
    --sp-2: 8px;
    --sp-3: 12px;
    --sp-4: 16px;
    --sp-5: 20px;
    --sp-6: 24px;
    --sp-8: 32px;
    --sp-10: 40px;
    --sp-12: 48px;
    --r-sm: 4px;
    --r-md: 6px;
    --r-lg: 8px;
    --r-xl: 12px;
    --r-2xl: 16px;
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-hover: 0 8px 16px -4px rgba(0, 0, 0, 0.08), 0 4px 6px -1px rgba(0, 0, 0, 0.04);
    --shadow-nav: 0 1px 3px rgba(0, 0, 0, 0.05);
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth
}

body {
    font-family: var(--font);
    line-height: 1.5;
    color: var(--n2);
    background: var(--primary-50);
    min-width: 1200px;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color .1s
}

a:hover {
    color: var(--primary-300);
    text-decoration: underline
}

ul {
    list-style: none
}

img {
    max-width: 100%;
    display: block
}

.container {
    max-width: 1200px;
    margin: 0 auto
}

/* ===== Skip Link (Accessibility) ===== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: #fff;
    padding: 8px 16px;
    font-size: 14px;
    z-index: 9999;
    border-radius: 0 0 var(--r-md) 0;
    text-decoration: none
}

.skip-link:focus {
    top: 0;
    color: #fff;
    text-decoration: none
}

/* ===== Reading Progress Bar ===== */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0;
    background: linear-gradient(90deg, var(--primary), var(--sec-1));
    z-index: 9998;
    transition: width .1s ease-out
}

/* ===== Header (Top Tools Bar) ===== */
.site-header {
    background: #f6f6f6;
    height: 41px;
    line-height: 41px;
    font-size: 12px;
    color: #333
}

.site-header__inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center
}

.site-header__left, .site-header__right {
    display: flex;
    align-items: center;
    gap: 0
}

.site-header__left > ul {
    display: flex;
    align-items: center;
    gap: 0;
    list-style: none
}

.site-header__left li {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0 8px;
    cursor: pointer;
    position: relative
}

.site-header__left li a {
    color: #333;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 4px
}

.site-header__left li img {
    width: 16px;
    height: 16px
}

.site-header__left li > i::after {
    content: '▾';
    font-style: normal;
    font-size: 10px;
    margin-left: 2px;
    color: #666
}

.site-header__dropdown {
    display: none;
    position: absolute;
    top: 41px;
    left: 0;
    background: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    z-index: 100;
    min-width: 80px;
    border-radius: 0 0 4px 4px
}

.site-header__left li:hover .site-header__dropdown {
    display: block
}

.site-header__dropdown li {
    display: block;
    padding: 0;
    width: 100%;
    line-height: 1.5
}

.site-header__dropdown li a {
    display: block;
    padding: 8px 16px;
    line-height: 1.5;
    white-space: nowrap
}

.site-header__dropdown li a:hover {
    color: var(--primary)
}

.site-header__right {
    gap: 16px
}

.site-header__right a {
    color: #333;
    text-decoration: none
}

.site-header__right a:hover {
    color: var(--primary)
}

.site-header__service {
    position: relative;
    cursor: pointer
}

.site-header__service-title {
    display: flex;
    align-items: center;
    gap: 4px
}

.site-header__service-detail {
    display: none;
    position: absolute;
    top: 41px;
    right: 0;
    background: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    z-index: 100;
    padding: 8px 16px;
    border-radius: 0 0 4px 4px;
    white-space: nowrap
}

.site-header__service:hover .site-header__service-detail {
    display: block
}

.site-header__login a {
    color: var(--primary);
    font-weight: 500
}

.site-header__user {
    position: relative;
    display: flex;
    align-items: center;
    gap: 4px;
    cursor: pointer
}

.site-header__user-name {
    color: var(--primary) !important;
    font-weight: 500
}

.site-header__user-name:hover {
    text-decoration: underline
}

.site-header__user-dropdown {
    display: none;
    position: absolute;
    top: 41px;
    right: 0;
    background: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    z-index: 100;
    min-width: 120px;
    border-radius: 0 0 4px 4px;
    padding: 8px 0;
    text-align: center
}

.site-header__user:hover .site-header__user-dropdown {
    display: block
}

.site-header__user-dropdown a {
    display: block;
    padding: 8px 16px;
    color: #333;
    text-decoration: none;
    line-height: 1.5;
    white-space: nowrap
}

.site-header__user-dropdown a:hover {
    color: var(--primary);
    background: #f5f5f5
}

.site-header__user-dropdown .logout {
    color: var(--error)
}

/* ===== Logo Bar ===== */
.site-logo {
    line-height: 100px;
    background: #fff
}

.site-logo__inner {
    width: 1200px;
    margin: 0 auto;
    overflow: hidden
}

.site-logo__main {
    display: flex;
    align-items: center;
    gap: 0;
    white-space: nowrap
}

.site-logo__main img {
    vertical-align: middle;
    height: 34px
}

.site-logo__main h1, .site-logo__main span {
    color: #1f77b1;
    font-size: 26px;
    padding-left: 15px;
    margin-left: 15px;
    position: relative;
    display: inline-block;
    vertical-align: middle;
    font-weight: 500;
    font-style: normal
}

.site-logo__main h1::before, .site-logo__main span::before {
    position: absolute;
    content: '';
    width: 1px;
    height: 30px;
    top: 50%;
    margin-top: -15px;
    left: 0;
    background-color: #ccc
}

.site-logo__main h1 b, .site-logo__main span b {
    font-weight: normal;
    font-size: 16px;
    color: #525f66;
    vertical-align: middle
}

.site-logo__desc {
    color: var(--accent-1);
    font-size: 14px;
    margin-left: 16px;
    text-decoration: none
}

.site-logo__desc:hover {
    color: var(--accent-1);
    text-decoration: none;
}

/* ===== Nav Bar ===== */
.site-nav {
    background: var(--primary);
    height: 48px;
    box-shadow: var(--shadow-nav)
}

.site-nav__inner {
    max-width: 1200px;
    margin: 0 auto
}

.site-nav__inner > ul {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 48px;
    list-style: none
}

.site-nav__inner > ul > li {
    height: 48px;
    line-height: 48px;
    padding: 0 20px;
    font-size: 15px;
    color: #fff;
    cursor: pointer;
    position: relative;
    white-space: nowrap;
    text-align: center
}

.site-nav__inner > ul > li > i::after {
    content: '▾';
    font-style: normal;
    font-size: 15px;
    margin-left: var(--sp-2);
    color: rgba(255, 255, 255, 0.7)
}

.site-nav__inner li a {
    color: #fff;
    text-decoration: none
}

.site-nav__inner li a:hover {
    text-decoration: none
}

.site-nav__inner li.on {
    background: rgba(255, 255, 255, 0.15);
    font-weight: 600
}

.site-nav__inner > ul > li:hover {
    background: rgba(255, 255, 255, 0.12)
}

.site-nav__dropdown {
    display: none;
    position: absolute;
    top: 48px;
    left: 0;
    background: #fff;
    box-shadow: var(--shadow-hover);
    z-index: 100;
    min-width: 140px;
    border-radius: 0 0 var(--r-lg) var(--r-lg);
    overflow: hidden
}

.site-nav__inner li:hover .site-nav__dropdown {
    display: block
}

.site-nav__dropdown li {
    height: auto;
    line-height: 1.5;
    padding: 0;
    width: 100%;
    font-size: 14px
}

.site-nav__dropdown li a {
    display: block;
    padding: var(--sp-3) var(--sp-5);
    color: var(--n3);
    text-decoration: none
}

.site-nav__dropdown li a:hover {
    color: var(--primary);
    background: var(--primary-100);
    text-decoration: none
}

/* ===== Breadcrumb ===== */
.breadcrumb {
    padding: var(--sp-6) 0;
    font-size: 12px;
    color: var(--n4);
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap
}

.breadcrumb a {
    color: var(--n4)
}

.breadcrumb a:hover {
    color: var(--primary);
    text-decoration: none
}

.breadcrumb .current {
    color: var(--n3);
    font-weight: 500
}

/* ===== Layout ===== */
.main-wrap {
    display: flex;
    gap: var(--sp-6);
    padding-bottom: var(--sp-10);
    align-items: flex-start
}

.art-col {
    flex: 1;
    min-width: 0;
    background: var(--n6);
    border-radius: var(--r-xl);
    padding: var(--sp-5)
}

/* 主内容核心区：标题/摘要/正文/FAQ/标签，卡内与下方运营内容（责任编辑/推荐/延伸阅读等）分隔 */
.art-core {
    border-bottom: 1px dashed var(--n5);
    padding-bottom: var(--sp-5);
    margin-bottom: var(--sp-5)
}

.sb-col {
    width: 300px;
    flex-shrink: 0
}

/* ===== TOC (Table of Contents) ===== */
.toc {
    background: var(--primary-100);
    border-radius: var(--r-lg);
    padding: var(--sp-4) var(--sp-5);
    margin-bottom: var(--sp-5);
    border-left: 4px solid var(--primary)
}

.toc-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--n1);
    margin-bottom: var(--sp-2);
    display: flex;
    align-items: center;
    gap: var(--sp-2)
}

.toc-title::before {
    content: '📑';
    font-size: 16px
}

.toc ol {
    list-style: decimal;
    padding-left: 24px
}

.toc li {
    margin-bottom: 6px
}

.toc a {
    font-size: 14px;
    color: var(--n3);
    text-decoration: none;
    transition: color .1s
}

.toc a:hover {
    color: var(--primary)
}

/* ===== Floating TOC (left hover) ===== */
.toc-float {
    position: fixed;
    left: calc((100vw - 1200px) / 2 - 28px);
    top: calc(50% - 120px);
    transform: translateY(-50%);
    z-index: 9998;
    display: block
}

.toc-float__tab {
    width: 28px;
    padding: 16px 4px;
    background: var(--primary);
    color: #fff;
    border-radius: var(--r-md) 0 0 var(--r-md);
    font-size: 12px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    box-shadow: var(--shadow-card);
    writing-mode: vertical-rl;
    letter-spacing: 2px
}

.toc-float__panel {
    position: absolute;
    right: 28px;
    top: 50%;
    width: 220px;
    background: #fff;
    border-radius: var(--r-xl);
    box-shadow: var(--shadow-hover);
    padding: var(--sp-5);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-50%) translateX(12px);
    transition: opacity .2s, transform .2s, visibility .2s;
    height:600px;
    overflow-y: scroll;
}

.toc-float:hover .toc-float__panel {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0)
}

.toc-float__title {
    font-size: 14px;
    font-weight: 600;
    color: var(--n1);
    margin-bottom: var(--sp-3);
    padding-bottom: var(--sp-2);
    border-bottom: 1px solid var(--n5);
    display: flex;
    align-items: center;
    gap: var(--sp-2)
}

.toc-float__list {
    list-style: none;
    padding: 0;
    margin: 0
}

.toc-float__list li {
    margin-bottom: var(--sp-2)
}

.toc-float__list a {
    font-size: 14px;
    color: var(--n3);
    text-decoration: none;
    display: block;
    padding: 6px var(--sp-2);
    border-radius: var(--r-sm);
    transition: background .1s, color .1s
}

.toc-float__list a:hover {
    background: var(--primary-100);
    color: var(--primary);
    text-decoration: none
}

.toc-float__sub {
    padding-left: var(--sp-4)
}

.toc-float__sub a {
    font-size: 13px;
    color: var(--n4)
}

.toc-float__list a.active {
    color: var(--primary);
    font-weight: 600;
    background: var(--primary-100)
}

/* ===== Card base ===== */
.card {
    background: var(--n6);
    border-radius: var(--r-xl);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    margin-bottom: var(--sp-6)
}

.card-body {
    padding: var(--sp-5)
}

.card-header {
    padding: var(--sp-4) var(--sp-5);
    font-size: 16px;
    font-weight: 600;
    color: var(--n1);
    border-bottom: 1px solid var(--n5);
    display: flex;
    align-items: center;
    gap: var(--sp-2)
}

.card-header::before {
    content: '';
    width: 4px;
    height: 18px;
    background: var(--primary);
    border-radius: var(--r-sm);
    flex-shrink: 0
}

/* ===== Aside Tools ===== */
.site-aside {
    position: fixed;
    left: calc((100vw - 1200px) / 2 - 112px);
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: #fff;
    border-radius: 14px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, .1);
    z-index: 9997;
    overflow: hidden;
}

.site-aside__item:first-child {
    border-radius: 14px 14px 0 0
}

.site-aside__item:last-child {
    border-radius: 0 0 14px 14px
}

.site-aside__item {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 76px;
    height: 56px;
    border: none;
    background: #fff;
    cursor: pointer;
    transition: background .15s, transform .2s ease;
    font-family: var(--font);
    padding: 0;
    text-decoration: none
}

.site-aside__item:hover {
    background: var(--primary-50);
    text-decoration: none;
    transform: scale(1.08)
}

.site-aside__item svg {
    width: 22px;
    height: 22px;
    transition: opacity .15s
}

.site-aside__item:hover svg {
    opacity: .8
}

.site-aside__label {
    position: absolute;
    left: 84px;
    top: 50%;
    transform: translateY(-50%) translateX(-8px);
    white-space: nowrap;
    background: var(--n1);
    color: #fff;
    font-size: 12px;
    padding: 5px 12px;
    border-radius: 6px;
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s, transform .2s, visibility .2s;
    pointer-events: none
}

.site-aside__label::before {
    content: '';
    position: absolute;
    left: -4px;
    top: 50%;
    transform: translateY(-50%);
    border: 4px solid transparent;
    border-right-color: var(--n1)
}

.site-aside__item:hover .site-aside__label {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0)
}

.site-aside__badge {
    position: absolute;
    top: 6px;
    right: 4px;
    min-width: 16px;
    height: 16px;
    line-height: 16px;
    text-align: center;
    background: var(--error);
    color: #fff;
    font-size: 10px;
    font-weight: 600;
    border-radius: 8px;
    padding: 0 5px;
    white-space: nowrap
}

.site-aside__item--text {
    flex-direction: column;
    gap: 6px;
    padding: 10px 4px;
    text-decoration: none
}

.site-aside__item--text .site-aside__text {
    font-size: 12px;
    color: var(--n3);
    font-weight: 500;
    line-height: 1
}

.site-aside__item--text:hover {
    text-decoration: none
}

.site-aside__item--text:hover .site-aside__text {
    color: var(--primary)
}

.site-aside__divider {
    height: 1px;
    background: var(--n5);
    margin: 0 12px
}

.site-aside__popover {
    position: absolute;
    left: 84px;
    top: 50%;
    transform: translateY(-50%) translateX(-8px);
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, .12);
    padding: 12px;
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s, transform .2s, visibility .2s;
    pointer-events: none;
    z-index: 10;
    text-align: center;
    width: 134px
}

.site-aside__popover::before {
    content: '';
    position: absolute;
    left: -4px;
    top: 50%;
    transform: translateY(-50%);
    border: 4px solid transparent;
    border-right-color: #fff
}

.site-aside__item:hover .site-aside__popover {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0)
}

.site-aside__popover img {
    display: block;
    border-radius: 8px;
    margin: 0 auto 6px
}

.site-aside__popover span {
    font-size: 12px;
    color: var(--n3);
    line-height: 1.5;
    display: block;
    text-align: center
}

/* ===== Ad slot ===== */
.ad-slot {
    height: 90px;
    background: var(--sec-4);
    border-radius: var(--r-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--n4);
    font-size: 13px;
    margin-bottom: var(--sp-6)
}

/* ===== Article Header ===== */
.art-header {
    margin-bottom: var(--sp-5)
}

.art-h1 {
    font-size: 28px;
    font-weight: 600;
    line-height: 1.3;
    color: var(--n1);
    margin-bottom: var(--sp-4);
    margin-top: var(--sp-4)
}

.art-meta {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    flex-wrap: wrap;
    padding-bottom: var(--sp-4);
    margin-bottom: var(--sp-5);
    border-bottom: 1px solid var(--n5);
    font-size: 14px;
    color: var(--n3)
}

.art-meta .tag {
    font-size: 12px;
    padding: 2px 10px;
    border-radius: var(--r-sm);
    background: var(--primary-200);
    color: var(--primary);
    font-weight: 500
}

.art-meta .author {
    font-weight: 600;
    color: var(--n1)
}

.meta-dot {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: var(--n5)
}

/* ===== Countdown Strip (thin, non-blocking) ===== */
.countdown-strip {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
    background: linear-gradient(90deg, var(--accent-3), var(--warning-bg));
    border-radius: var(--r-lg);
    padding: 6px var(--sp-4);
    margin-bottom: var(--sp-4);
    font-size: 13px
}

.countdown-strip .cs-icon {
    font-size: 14px
}

.countdown-strip .cs-text {
    color: var(--n3)
}

.countdown-strip .cs-num {
    font-weight: 700;
    color: var(--accent-1);
    font-size: 16px
}

/* ===== Inline CTA Card (contextual, after fee table) ===== */
.cta-inline {
    display: flex;
    align-items: center;
    gap: var(--sp-4);
    background: linear-gradient(135deg, var(--primary), var(--primary-300));
    border-radius: var(--r-xl);
    padding: var(--sp-5);
    margin-bottom: var(--sp-6);
    text-decoration: none;
    transition: box-shadow .1s
}

.cta-inline:hover {
    box-shadow: var(--shadow-hover);
    text-decoration: none
}

.cta-inline .ci-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--r-md);
    background: rgba(255, 255, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0
}

.cta-inline .ci-text {
    flex: 1
}

.cta-inline .ci-title {
    font-size: 16px;
    font-weight: 600;
    color: #fff
}

.cta-inline .ci-desc {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 2px
}

.cta-inline .ci-btn {
    height: 40px;
    line-height: 40px;
    padding: 0 var(--sp-6);
    background: #fff;
    color: var(--primary);
    font-size: 15px;
    font-weight: 600;
    border-radius: 20px;
    white-space: nowrap
}

/* ===== Sidebar Teacher Card ===== */
.sb-teacher {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    background: linear-gradient(135deg, var(--primary-100), var(--primary-200));
    border-radius: var(--r-xl);
    padding: var(--sp-3) var(--sp-4);
    margin-bottom: var(--sp-4)
}

.sb-teacher .st-img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--sec-1));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    flex-shrink: 0
}

.sb-teacher .st-info {
    flex: 1;
    min-width: 0
}

.sb-teacher .st-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--n1)
}

.sb-teacher .st-desc {
    font-size: 12px;
    color: var(--n4);
    margin-top: 2px
}

.sb-teacher .st-btn {
    height: 32px;
    line-height: 32px;
    padding: 0 14px;
    background: var(--primary);
    color: #fff;
    font-size: 13px;
    font-weight: 500;
    border-radius: 16px;
    text-decoration: none;
    white-space: nowrap;
    transition: background .1s;
    flex-shrink: 0
}

.sb-teacher .st-btn:hover {
    background: var(--primary-300);
    text-decoration: none;
    color: #fff
}

/* ===== Sidebar Countdown Card ===== */
.sb-countdown {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    background: linear-gradient(135deg, var(--primary), var(--primary-300));
    border-radius: var(--r-xl);
    padding: var(--sp-4);
    margin-bottom: var(--sp-4)
}

.sb-countdown .scd-text {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85)
}

.sb-countdown .scd-numrow {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
    font-size: 22px;
}

.sb-countdown .scd-num {
    font-size: 36px;
    font-weight: 700;
    color: #fff;
    line-height: 1.1
}

.sb-countdown .scd-label {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500
}

/* ===== Step Timeline Card ===== */
.step-wrap {
    background: var(--n6);
    border-radius: var(--r-xl);
    box-shadow: var(--shadow-card);
    margin-bottom: var(--sp-6);
    overflow: hidden;
    padding: 25px 20px 25px 33px
}

.step-item {
    margin-bottom: 14px;
    position: relative
}

.step-item:last-child {
    margin-bottom: 0
}

.step-hd {
    position: relative;
    line-height: 24px;
    margin-bottom: 10px
}

.step-hd::before {
    position: absolute;
    content: '';
    width: 11px;
    height: 11px;
    background: #e6e6e6;
    border-radius: 50%;
    left: -26px;
    top: 50%;
    margin-top: -5.5px
}

.step-hd.on::before {
    background: var(--primary)
}

.step-hd span {
    display: inline-block;
    height: 24px;
    margin-right: 10px;
    padding: 0 8px 0 5px;
    border-radius: 0 24px 24px 0;
    line-height: 24px;
    text-align: center;
    font-size: 14px;
    color: #999;
    background: #eee
}

.step-hd.on span {
    background: var(--primary);
    color: #fff
}

.step-hd h3 {
    display: inline-block;
    color: #333;
    font-size: 13px;
    font-weight: normal;
    line-height: 15px
}

.step-bd {
    overflow: hidden;
    color: #999
}

.step-bd ul {
    display: flex;
    flex-wrap: wrap;
    padding: 0;
    margin: 0;
    gap: 0
}

.step-bd li {
    flex: 0 0 calc(33.333% - 8px);
    margin: 0 4px 8px;
    font-size: 13px;
    line-height: 17px;
    list-style: none
}

.step-bd li a {
    color: #999;
    font-size: 13px;
    text-decoration: none;
    display: block;
    padding: 4px 0
}

.step-bd li a:hover {
    color: var(--primary);
    text-decoration: underline
}

/* ===== Mobile Floating CTA Bar ===== */

/* ===== Summary Card (GEO) ===== */
.summary-card {
    background: var(--primary-100);
    border-left: 4px solid var(--accent-1);
    border-radius: var(--r-lg);
    padding: var(--sp-5);
    margin-bottom: var(--sp-6)
}

.summary-card .sc-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: var(--sp-3);
    color: var(--n1)
}

.summary-card ul {
    padding-left: 20px;
    list-style: disc
}

.summary-card li {
    line-height: 1.8;
    font-size: 14px;
    color: var(--n2)
}

.summary-card .num {
    font-weight: 700;
    color: var(--accent-1)
}

/* ===== Fee Comparison Table (GEO) ===== */
.fee-table-wrap {
    margin-bottom: var(--sp-6);
    overflow-x: auto
}

.fee-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    border-radius: var(--r-xl);
    overflow: hidden;
    box-shadow: var(--shadow-card)
}

.fee-table caption {
    font-size: 16px;
    font-weight: 600;
    color: var(--n1);
    text-align: left;
    padding: var(--sp-4) 0;
    margin-bottom: var(--sp-2)
}

.fee-table th {
    background: var(--sec-4);
    color: var(--n1);
    padding: var(--sp-4);
    font-weight: 600;
    text-align: left;
    font-size: 14px;
    border-bottom: 2px solid var(--n5)
}

.fee-table td {
    padding: var(--sp-4);
    border-bottom: 1px solid var(--n5);
    color: var(--n2);
    line-height: 1.5
}

.fee-table tbody tr:last-child td {
    border-bottom: none
}

.fee-table tbody tr:hover td {
    background: var(--primary-100)
}

.fee-table .fee-num {
    font-size: 18px;
    font-weight: 700;
    color: var(--accent-1)
}

.fee-table .fee-unit {
    font-size: 12px;
    color: var(--n4);
    font-weight: 400
}

.fee-table .fee-total td {
    background: var(--accent-3);
    border-top: 2px solid var(--accent-1)
}

.fee-table .fee-total .fee-num {
    color: var(--accent-2)
}

/* ===== Article Body ===== */
.art-body h2 {
    font-size: 22px;
    font-weight: 600;
    line-height: 1.3;
    color: var(--n1);
    margin-top: var(--sp-10);
    margin-bottom: var(--sp-4);
    padding-left: var(--sp-3);
    border-left: 4px solid var(--primary);
    scroll-margin-top: 20px
}

.art-body h3 {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--n1);
    margin-top: var(--sp-6);
    margin-bottom: var(--sp-3)
}

.art-body p {
    font-size: 16px;
    line-height: 1.75;
    color: var(--n2);
    margin-bottom: var(--sp-3)
}

.art-body ul {
    padding-left: 24px;
    list-style: disc;
    margin-bottom: var(--sp-4)
}

.art-body ol {
    padding-left: 24px;
    list-style: decimal;
    margin-bottom: var(--sp-4)
}

.art-body li {
    font-size: 16px;
    line-height: 1.75;
    color: var(--n2);
    margin-bottom: var(--sp-2)
}

.art-body blockquote {
    margin: var(--sp-4) 0;
    padding: var(--sp-3) var(--sp-5);
    border-left: 4px solid var(--primary);
    background: var(--primary-50);
    border-radius: var(--r-md);
    font-size: 15px;
    color: var(--n3);
    line-height: 1.75
}

.art-body ol.geo-toc {
    background: var(--primary-100);
    border-radius: var(--r-lg);
    padding: var(--sp-4) var(--sp-8);
    margin-bottom: var(--sp-5);
    border-left: 4px solid var(--primary);
    list-style: decimal
}

.art-body ol.geo-toc li {
    margin-bottom: 6px
}

.art-body ol.geo-toc a {
    font-size: 14px;
    color: var(--n3);
    text-decoration: none;
    transition: color .1s
}

.art-body ol.geo-toc a:hover {
    color: var(--primary)
}

.art-body ul.geo-options {
    list-style: none;
    padding-left: 0;
    margin-bottom: var(--sp-3)
}

.art-body ul.geo-options li {
    padding: var(--sp-2) var(--sp-3);
    margin-bottom: 4px;
    background: var(--primary-50);
    border-radius: var(--r-md);
    font-size: 15px
}

.art-body p.geo-answer {
    font-size: 15px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--sp-2)
}

.art-body p.geo-explanation {
    font-size: 14px;
    color: var(--n4);
    line-height: 1.8;
    padding: var(--sp-3);
    background: #f9f9fb;
    border-radius: var(--r-md);
    margin-bottom: var(--sp-4)
}

.art-body ul.cl {
    padding-left: 20px;
    list-style: disc;
    margin-bottom: var(--sp-4)
}

.art-body ul.cl li {
    font-size: 16px;
    line-height: 1.75;
    color: var(--n2);
    margin-bottom: var(--sp-2)
}

.art-body .num {
    font-weight: 700;
    color: var(--accent-1)
}

.art-body a.outbound {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 2px
}

.art-body a.outbound::after {
    content: ' ↗';
    font-size: 12px
}

/* ===== FAQ (details/summary accordion) ===== */
.faq-card {
    border: 2px solid var(--primary);
    border-radius: var(--r-xl);
    padding: var(--sp-5);
    margin: var(--sp-5) 0;
    background: var(--n6)
}

.faq-item {
    margin-bottom: 0;
    border-bottom: 1px solid var(--n5)
}

.faq-item:last-child {
    border-bottom: none
}

.faq-item summary,
.faq-item h3{
    list-style: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--n1);
    display: flex;
    align-items: flex-start;
    gap: var(--sp-2);
    line-height: 1.5;
    padding: var(--sp-4) 0;
    user-select: none
}

.faq-item summary::-webkit-details-marker,
.faq-item h3::-webkit-details-marker{
    display: none
}

.faq-item summary::after,
.faq-item h3::after{
    content: '＋';
    margin-left: auto;
    font-size: 20px;
    font-weight: 400;
    color: var(--n4);
    transition: transform .2s;
    flex-shrink: 0
}

.faq-item[open] summary::after,
.faq-item[open] h3::after{
    content: '－'
}

.faq-item summary .qb,
.faq-item h3 .qb{
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--primary);
    color: #fff;
    border-radius: var(--r-sm);
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 1px
}

.faq-a {
    font-size: 14px;
    color: var(--n3);
    line-height: 1.6;
    padding: 0 0 var(--sp-4) 32px;
    white-space: pre-wrap
}

/* ===== Author Card (E-E-A-T) ===== */
.author-card {
    display: flex;
    align-items: center;
    gap: var(--sp-4);
    background: var(--primary-100);
    border-radius: var(--r-lg);
    padding: var(--sp-5);
    margin-top: var(--sp-4)
}

/* ===== Authority ===== */
.authority-box {
    background: var(--primary-100);
    border-radius: var(--r-lg);
    padding: var(--sp-5);
    margin: var(--sp-5) 0;
    font-size: 14px;
    color: var(--n3);
    line-height: 1.8
}

.authority-box .al {
    font-weight: 600;
    color: var(--n1)
}

.update-log {
    margin-top: var(--sp-3);
    padding-top: var(--sp-3);
    border-top: 1px dashed var(--n5);
    font-size: 13px;
    color: var(--n4)
}

/* 资质说明（类别级 qualification 字段），保留多行换行 */
.author-qualification {
    white-space: pre-wrap;
    margin: 8px 0 0;
    font-size: 13px;
    color: var(--n3);
    line-height: 1.7
}

/* ===== Share Bar ===== */
.share-bar {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    padding: var(--sp-4) 0;
    border-top: 1px solid var(--n5);
    border-bottom: 1px solid var(--n5);
    margin: var(--sp-5) 0
}

.share-bar .share-label {
    font-size: 14px;
    color: var(--n4)
}

.share-bar .share-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    height: 32px;
    padding: 0 12px;
    border-radius: 16px;
    font-size: 13px;
    text-decoration: none;
    transition: opacity .1s
}

.share-bar .share-btn:hover {
    opacity: .85;
    text-decoration: none
}

.share-bar .share-wx {
    background: var(--success-bg);
    color: var(--success)
}

.share-bar .share-wb {
    background: #fff3e0;
    color: #ff6f00
}

.share-bar .share-link {
    background: var(--primary-100);
    color: var(--primary)
}

/* ===== Tags ===== */
.tag-row {
    display: flex;
    gap: var(--sp-2);
    flex-wrap: wrap;
    padding: var(--sp-4) 0
}

.tag-row a {
    font-size: 12px;
    height: 26px;
    line-height: 26px;
    padding: 0 10px;
    border-radius: var(--r-sm);
    background: var(--primary-100);
    color: var(--n4);
    transition: background .1s, color .1s;
    display: inline-block
}

.tag-row a:hover {
    background: var(--primary-200);
    color: var(--primary);
    text-decoration: none
}

/* ===== Article Tags (clickable, jump to tag page) ===== */
.art-tags {
    margin: var(--sp-5) 0;
    /*padding: var(--sp-5) 0;*/
    /*border-top: 1px solid var(--n5);*/
    /*border-bottom: 1px solid var(--n5)*/
}

.art-tags__head {
    display: flex;
    align-items: center;
    gap: var(--sp-2);
    margin-bottom: var(--sp-3);
    font-size: 14px;
    font-weight: 600;
    color: var(--n1)
}

.art-tags__head::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 16px;
    background: var(--primary);
    border-radius: var(--r-sm);
    flex-shrink: 0
}

.art-tags__list {
    display: flex;
    gap: var(--sp-2);
    flex-wrap: wrap
}

.art-tags__item {
    /*display: inline-flex;*/
    /*align-items: center;*/
    /*gap: 4px;*/
    /*height: 30px;*/
    /*line-height: 30px;*/
    padding: 2px 14px;
    border-radius: 15px;
    background: var(--primary-100);
    color: var(--primary-300);
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
    transition: all .15s;
    white-space: nowrap;
    border: 1px solid transparent
}

.art-tags__item:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(57, 119, 255, 0.25)
}

.art-tags__item::before {
    content: '#';
    font-size: 12px;
    opacity: .6
}

/* ===== Resource Table ===== */
.res-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--sp-5) 0;
    font-size: 14px
}

.res-table th {
    background: var(--sec-4);
    color: var(--n1);
    padding: var(--sp-3) var(--sp-4);
    font-weight: 600;
    text-align: center;
    font-size: 14px
}

.res-table th:first-child {
    border-radius: 0
}

.res-table th:last-child {
    border-radius: 0
}

.res-table td {
    padding: var(--sp-3) var(--sp-4);
    text-align: center;
    border-bottom: 1px solid var(--n5);
    color: var(--n2);
    line-height: 1.5
}

.res-table tr:hover td {
    background: var(--primary-100)
}

.res-table a {
    color: var(--primary)
}

.res-table .free {
    color: var(--error);
    font-weight: 600
}

/* ===== Study Tabs ===== */
.study-tabs {
    margin: var(--sp-5) 0;
    background: var(--primary-50);
    border-radius: var(--r-2xl);
    padding: var(--sp-5)
}

.tab-nav {
    display: flex;
    gap: var(--sp-2);
    margin-bottom: var(--sp-4)
}

.tab-nav .tab {
    padding: var(--sp-2) var(--sp-5);
    font-size: 14px;
    font-weight: 500;
    color: var(--n3);
    cursor: pointer;
    border: none;
    background: #fff;
    border-radius: var(--r-lg);
    transition: all .15s;
    font-family: var(--font);
    box-shadow: var(--shadow-card)
}

.tab-nav .tab:hover {
    color: var(--primary)
}

.tab-nav .tab.active {
    color: #fff;
    background: var(--primary);
    font-weight: 600;
    box-shadow: none
}

.tab-panel {
    display: none
}

.tab-panel.active {
    display: block !important
}

.study-item {
    display: flex;
    align-items: center;
    gap: var(--sp-4);
    padding: var(--sp-4);
    border-radius: var(--r-xl);
    background: #fff;
    margin-bottom: var(--sp-2);
    transition: box-shadow .15s, transform .15s
}

.study-item:last-child {
    margin-bottom: 0
}

.study-item:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-1px)
}

.study-item .si-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--r-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0
}

.study-item .si-icon svg {
    width: 24px;
    height: 24px
}

.study-item .si-info {
    flex: 1;
    min-width: 0
}

.study-item .si-title {
    font-size: 15px;
    font-weight: 500;
    color: var(--n1)
}

.study-item .si-meta {
    font-size: 12px;
    color: var(--n4);
    margin-top: 3px
}

.study-item .si-btn {
    height: 36px;
    line-height: 36px;
    padding: 0 var(--sp-5);
    font-size: 13px;
    font-weight: 500;
    border-radius: var(--r-lg);
    border: none;
    cursor: pointer;
    font-family: var(--font);
    white-space: nowrap;
    transition: opacity .15s
}

.study-item .si-btn.primary {
    background: var(--primary);
    color: #fff
}

.study-item .si-btn.primary:hover {
    background: var(--primary-300)
}

.study-item .si-btn.outline {
    background: #fff;
    color: var(--primary);
    border: 1px solid var(--primary)
}

.study-item .si-btn.outline:hover {
    background: var(--primary-50)
}

.study-item .si-cover {
    width: 96px;
    height: 60px;
    border-radius: var(--r-md);
    overflow: hidden;
    flex-shrink: 0;
    position: relative
}

.study-item .si-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block
}

.study-item .si-cover .si-cover-title {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, .35);
    color: #fff;
    font-size: 12px;
    font-weight: 500;
    text-align: center;
    padding: 4px 6px;
    line-height: 1.3;
    word-break: break-all
}

/* ===== Disclaimer ===== */
.disclaimer {
    padding: var(--sp-4);
    background: var(--warning-bg);
    border-radius: var(--r-lg);
    font-size: 13px;
    color: var(--n3);
    line-height: 1.7;
    margin: var(--sp-5) 0
}

/* ===== 延伸阅读 ===== */
.rec-read {
    margin-top: var(--sp-6)
}

.rec-read h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--n1);
    margin-bottom: var(--sp-4)
}

.rec-list {
    display: grid;
    grid-template-columns:1fr 1fr;
    gap: var(--sp-2)
}

.rec-list a {
    font-size: 14px;
    color: var(--n2);
    padding: var(--sp-3);
    border-radius: var(--r-md);
    background: var(--primary-100);
    transition: background .1s, color .1s;
    display: block;
    line-height: 1.5
}

.rec-list a:hover {
    background: var(--primary-200);
    color: var(--primary);
    text-decoration: none
}

/* ===== QR codes ===== */
.qr-row {
    display: flex;
    gap: var(--sp-4);
    margin: var(--sp-5) 0
}

.qr-card {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    padding: var(--sp-4);
    border: 1px solid var(--n5);
    border-radius: var(--r-lg)
}

.qr-card .qr-img {
    width: 110px;
    height: 110px;
    border-radius: var(--r-md);
    background: var(--sec-4);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--n4);
    font-size: 11px;
    flex-shrink: 0
}

.qr-card .qr-text {
    font-size: 13px;
    color: var(--n3);
    line-height: 1.6
}

.qr-card .qr-text strong {
    color: var(--n1);
    font-size: 14px
}

.qr-card .qr-btn {
    display: inline-block;
    margin-top: var(--sp-2);
    height: 28px;
    line-height: 28px;
    padding: 0 12px;
    font-size: 12px;
    border-radius: 14px;
    background: var(--primary);
    color: #fff;
    text-decoration: none
}

.qr-card .qr-btn:hover {
    background: var(--primary-300);
    text-decoration: none;
    color: #fff
}

/* ===== Free trial videos ===== */
.free-list {
    display: grid;
    grid-template-columns:repeat(4, 1fr);
    gap: var(--sp-3);
    margin: var(--sp-4) 0
}

.free-item {
    cursor: pointer
}

.free-item .fi-thumb {
    width: 200px;
    height: 125px;
    border-radius: var(--r-md);
    overflow: hidden;
    margin-bottom: var(--sp-2);
    position: relative
}

.free-item .fi-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block
}

.free-item .fi-thumb::after {
    content: '▶';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(0, 0, 0, .5);
    color: #fff;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity .15s
}

.free-item:hover .fi-thumb::after {
    opacity: 1
}

.free-item .fi-title {
    font-size: 13px;
    color: var(--n2);
    line-height: 1.5
}

/* ===== 备考方案 ===== */
.prep-card {
    border: 1px solid var(--n5);
    border-radius: var(--r-xl);
    padding: var(--sp-5);
    margin: var(--sp-5) 0;
    display: flex;
    gap: var(--sp-5)
}

.prep-card .pc-left {
    flex: 1
}

.prep-card .pc-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--n1);
    margin-bottom: var(--sp-2)
}

.prep-card .pc-meta {
    font-size: 13px;
    color: var(--n4);
    margin-bottom: var(--sp-3)
}

.prep-card .pc-meta b {
    color: var(--n2)
}

.prep-card .pc-desc {
    font-size: 14px;
    color: var(--n3);
    line-height: 1.7;
    margin-bottom: var(--sp-4)
}

.prep-card .pc-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 44px;
    padding: 0 var(--sp-6);
    background: var(--accent-1);
    color: #fff;
    font-size: 16px;
    font-weight: 500;
    border-radius: 22px;
    border: none;
    cursor: pointer;
    font-family: var(--font);
    transition: background .1s, box-shadow .1s;
    text-decoration: none
}

.prep-card .pc-btn:hover {
    background: var(--accent-2);
    box-shadow: 0 4px 8px rgba(255, 87, 34, 0.5);
    color: #fff;
    text-decoration: none
}

.prep-card .pc-right {
    width: 200px;
    flex-shrink: 0
}

.prep-card .pc-thumb {
    width: 100%;
    aspect-ratio: 16:10;
    border-radius: var(--r-lg);
    background: linear-gradient(135deg, var(--primary-300), var(--primary-400));
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.4);
    font-size: 14px
}

/* ===== 备考资料 banner ===== */
.prep-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: var(--sp-5) 0;
    background: linear-gradient(90deg, var(--primary), var(--primary-300));
    border-radius: var(--r-xl);
    padding: var(--sp-4) var(--sp-6);
    text-decoration: none;
    transition: box-shadow .1s
}

.prep-banner:hover {
    box-shadow: var(--shadow-hover)
}

.prep-banner .pb-text {
    font-size: 16px;
    font-weight: 600;
    color: #fff
}

.prep-banner .pb-arrow {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8)
}

/* ===== 题库入口 ===== */
.tiku-box {
    background: var(--primary-500);
    border-radius: var(--r-2xl);
    padding: var(--sp-6);
    margin: var(--sp-5) 0;
    color: #fff;
    display: flex;
    align-items: center;
    gap: var(--sp-6)
}

.tiku-box .tb-stat {
    flex-shrink: 0;
    text-align: center;
    padding-right: var(--sp-6);
    border-right: 1px solid rgba(255, 255, 255, 0.15)
}

.tiku-box .tb-stat .tb-num {
    font-size: 26px;
    font-weight: 700;
    line-height: 1.2
}

.tiku-box .tb-stat .tb-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.65);
    margin-top: var(--sp-2)
}

.tiku-box .tb-btns {
    display: grid;
    grid-template-columns:repeat(3, 1fr);
    gap: var(--sp-3);
    flex: 1
}

.tiku-box .tb-btns a {
    display: flex;
    align-items: center;
    gap: var(--sp-2);
    padding: var(--sp-3) var(--sp-4);
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--r-lg);
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    transition: background .15s, transform .15s;
    text-decoration: none
}

.tiku-box .tb-btns a:hover {
    background: rgba(255, 255, 255, 0.2);
    text-decoration: none;
    transform: translateY(-1px)
}

.tiku-box .tb-btns a svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    opacity: 0.85
}

/* ===== Back to Top ===== */
.back-to-top {
    display: none
}

/* ===== Floating Toolbar ===== */
.float-tools {
    position: fixed;
    right: calc((100vw - 1200px) / 2 - 112px);
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: #fff;
    border-radius: 14px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, .1);
    overflow: hidden;
    z-index: 9997
}

.float-tools__item:first-child {
    border-radius: 14px 14px 0 0
}

.float-tools__item:last-child {
    border-radius: 0 0 14px 14px
}

.float-tools__item {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 76px;
    height: 56px;
    border: none;
    background: #fff;
    cursor: pointer;
    transition: background .15s, transform .2s ease;
    font-family: var(--font);
    padding: 0
}

.float-tools__item:hover {
    background: var(--primary-50);
    transform: scale(1.08)
}

.float-tools__item svg {
    width: 20px;
    height: 20px;
    color: var(--n3);
    transition: color .15s
}

.float-tools__item:hover svg {
    color: var(--primary)
}

.float-tools__label {
    position: absolute;
    right: 54px;
    top: 50%;
    transform: translateY(-50%) translateX(8px);
    white-space: nowrap;
    background: var(--n1);
    color: #fff;
    font-size: 12px;
    padding: 5px 12px;
    border-radius: 6px;
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s, transform .2s, visibility .2s;
    pointer-events: none
}

.float-tools__label::after {
    content: '';
    position: absolute;
    right: -4px;
    top: 50%;
    transform: translateY(-50%);
    border: 4px solid transparent;
    border-left-color: var(--n1)
}

.float-tools__item:hover .float-tools__label {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0)
}

.float-tools__divider {
    height: 1px;
    background: var(--n6);
    margin: 0 8px
}

.float-tools__item--top {
    height: 0;
    padding-top: 0;
    padding-bottom: 0;
    opacity: 0;
    visibility: hidden;
    border: 0;
    transition: height .25s, opacity .2s, padding .25s, visibility .2s
}

.float-tools__item--top.visible {
    height: 56px;
    opacity: 1;
    visibility: visible
}

.float-tools__item--text {
    flex-direction: column;
    gap: 6px;
    height: auto;
    padding: 10px 4px;
    text-decoration: none
}

.float-tools__item--text .float-tools__text {
    font-size: 12px;
    color: var(--n3);
    font-weight: 500;
    line-height: 1
}

.float-tools__item--text:hover {
    text-decoration: none
}

.float-tools__item--text:hover .float-tools__text {
    color: var(--primary)
}

.float-tools__phone-panel {
    position: absolute;
    right: 84px;
    top: 50%;
    transform: translateY(-50%) translateX(12px);
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, .15);
    padding: 12px 16px;
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s, transform .2s, visibility .2s;
    pointer-events: none;
    white-space: nowrap
}

.float-tools__phone-panel::after {
    content: '';
    position: absolute;
    right: -6px;
    top: 50%;
    transform: translateY(-50%);
    border: 6px solid transparent;
    border-left-color: #fff
}

.float-tools__item--phone:hover .float-tools__phone-panel {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0)
}

.float-tools__phone-panel p {
    margin: 0;
    line-height: 1.8
}

.float-tools__phone-panel .pp-label {
    font-size: 12px;
    color: var(--n4)
}

.float-tools__phone-panel .pp-num {
    font-size: 15px;
    font-weight: 600;
    color: var(--primary)
}

.float-tools__qr-panel {
    position: absolute;
    right: 84px;
    top: 50%;
    transform: translateY(-50%) translateX(12px);
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, .15);
    padding: 12px;
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s, transform .2s, visibility .2s;
    pointer-events: none;
    text-align: center
}

.float-tools__qr-panel::after {
    content: '';
    position: absolute;
    right: -6px;
    top: 50%;
    transform: translateY(-50%);
    border: 6px solid transparent;
    border-left-color: #fff
}

.float-tools__item--qr:hover .float-tools__qr-panel {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0)
}

.float-tools__qr-panel .qp-img {
    width: 120px;
    height: 120px;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 8px
}

.float-tools__qr-panel .qp-img img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain
}

.float-tools__qr-panel .qp-text {
    font-size: 12px;
    color: var(--n3);
    white-space: nowrap
}

/* ===== Sidebar ===== */
.sb-card {
    background: var(--n6);
    border-radius: var(--r-xl);
    box-shadow: var(--shadow-card);
    margin-bottom: var(--sp-6);
    overflow: hidden
}

.sb-header {
    padding: var(--sp-4) var(--sp-5);
    font-size: 16px;
    font-weight: 600;
    color: var(--n1);
    border-bottom: 1px solid var(--n5);
    display: flex;
    align-items: center;
    gap: var(--sp-2)
}

.sb-header::before {
    content: '';
    width: 4px;
    height: 18px;
    background: var(--primary);
    border-radius: var(--r-sm);
    flex-shrink: 0
}

.sb-header .more {
    margin-left: auto;
    font-size: 12px;
    font-weight: 400;
    color: var(--n4)
}

.sb-body {
    padding: var(--sp-4) var(--sp-5)
}

.free-course{margin:var(--sp-5) 0;background:var(--n6);border-radius:var(--r-xl);box-shadow:var(--shadow-card);padding:var(--sp-5)}
.free-course>h3{font-size:16px;font-weight:600;color:var(--n1);margin:0 0 var(--sp-4);display:flex;align-items:center;gap:var(--sp-2)}
.free-course>h3::before{content:'';width:4px;height:18px;background:var(--primary);border-radius:var(--r-sm);flex-shrink:0}
.free-course-list{display:flex;gap:var(--sp-5)}
.free-course-item{display:block;width:calc((100% - 60px)/4);text-decoration:none;transition:transform .2s,box-shadow .2s}
.free-course-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);text-decoration:none}
.free-course-thumb{width:100%;height:125px;border-radius:var(--r-lg);overflow:hidden;position:relative;background:var(--primary-50)}
.free-course-thumb img{position:absolute;left:0;top:0;width:100%;height:100%;object-fit:cover}
.free-course-thumb .play-icon{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:2;width:30px;height:25px;background:url(https://lstatic.xisaiwang.com/educity/pc/cmsng/img/index/vid_icon.png) no-repeat center/contain;pointer-events:none}
.free-course-thumb .thumb-title{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;font-size:12px;color:#fff;width:80%;z-index:2;pointer-events:none}
.free-course-name{color:var(--n3);font-size:14px;line-height:20px;padding:var(--sp-2) 0 0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;text-overflow:ellipsis;word-break:break-all}

.tong-course{margin:var(--sp-5) 0;background:var(--n6);border-radius:var(--r-xl);box-shadow:var(--shadow-card);padding:var(--sp-5)}
.tong-course>h3{font-size:16px;font-weight:600;color:var(--n1);margin:0 0 var(--sp-4);display:flex;align-items:center;gap:var(--sp-2)}
.tong-course>h3::before{content:'';width:4px;height:18px;background:var(--primary);border-radius:var(--r-sm);flex-shrink:0}
.tong-tabs-hd{display:flex;gap:var(--sp-2);margin-bottom:var(--sp-4)}
.tong-tab{padding:var(--sp-2) var(--sp-5);font-size:14px;font-weight:500;color:var(--n3);cursor:pointer;border:none;background:#fff;border-radius:var(--r-lg);transition:all .15s;box-shadow:var(--shadow-card)}
.tong-tab:hover{color:var(--primary)}
.tong-tab.on{color:#fff;background:var(--primary);font-weight:600;box-shadow:none}
.tong-tabs-bd{background:var(--primary-50);border-radius:var(--r-lg);padding:var(--sp-5)}
.tong-panel{display:flex;align-items:flex-start;gap:var(--sp-6)}
.tong-info{flex:1;min-width:0}
.tong-title{font-size:18px;font-weight:600;color:var(--n1);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin:0 0 var(--sp-2)}
.tong-meta{margin:var(--sp-2) 0 var(--sp-3);color:var(--n4);font-size:14px}
.tong-meta span{margin-right:36px}
.tong-meta b{font-weight:normal;color:var(--n1)}
.tong-desc{background:var(--n6);font-size:14px;color:var(--n4);padding:var(--sp-3);margin-bottom:var(--sp-4);border-radius:var(--r-md)}
.tong-btn{display:inline-block;height:32px;line-height:32px;padding:0 var(--sp-5);text-align:center;font-size:14px;font-weight:500;color:#fff;background:var(--primary);border-radius:var(--r-lg);text-decoration:none;transition:background .15s}
.tong-btn:hover{background:var(--primary-300);text-decoration:none}
.tong-video{width:328px;height:185px;flex-shrink:0;border-radius:var(--r-lg);overflow:hidden;position:relative;cursor:pointer;background:var(--primary-50)}
.tong-video img{position:absolute;left:0;top:0;width:100%;height:100%;object-fit:cover}
.tong-video .play-icon{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:2;width:30px;height:25px;background:url(https://lstatic.xisaiwang.com/educity/pc/cmsng/img/index/vid_icon.png) no-repeat center/contain;pointer-events:none}
.tong-video .thumb-title{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;color:#fff;font-size:18px;font-weight:600;width:288px;z-index:2;pointer-events:none}

.sb-qr-ad {
    display: flex;
    align-items: center;
    gap: var(--sp-4);
    padding: var(--sp-4);
    margin-bottom: var(--sp-4);
    background: #fff;
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-card)
}

.sb-qr-ad .sqr-img {
    width: 140px;
    height: 140px;
    flex-shrink: 0;
    border-radius: var(--r-md);
    overflow: hidden;
    background: var(--sec-4)
}

.sb-qr-ad .sqr-img img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain
}

.sb-qr-ad .sqr-info {
    min-width: 0;
    flex: 1
}

.sb-qr-ad .sqr-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--n1);
    line-height: 1.4;
    margin-bottom: var(--sp-2)
}

.sb-qr-ad .sqr-desc {
    font-size: 13px;
    color: var(--n3);
    line-height: 1.6;
    word-break: break-all
}

.sb-qr-promo {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    padding-bottom: var(--sp-3);
    border-bottom: 1px solid var(--n6);
    margin-bottom: var(--sp-3)
}

.sb-qr-promo .sq-img {
    width: 100px;
    height: 100px;
    border-radius: var(--r-md);
    background: var(--sec-4);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--n4);
    font-size: 10px;
    flex-shrink: 0
}

.sb-qr-promo .sq-text {
    font-size: 13px;
    color: var(--n2);
    line-height: 1.5;
    min-width: 0
}

.sb-qr-promo .sq-text strong {
    display: block;
    font-size: 14px;
    color: var(--n1);
    margin-bottom: 2px;
    white-space: nowrap
}

.sb-qr-promo .sq-text .sq-desc {
    font-size: 12px;
    color: var(--n3);
    white-space: nowrap
}

.sb-read-list a {
    display: block;
    padding: 8px 0;
    font-size: 13px;
    color: var(--n2);
    line-height: 1.5;
    border-bottom: 1px dashed var(--n5);
    transition: color .1s
}

.sb-read-list a:hover {
    color: var(--primary);
    text-decoration: none
}

.sb-read-list a:last-child {
    border-bottom: none
}

.sb-read-list .hot {
    color: var(--error)
}

.sb-tiku-list {
    display: grid;
    grid-template-columns:1fr 1fr;
    gap: var(--sp-2)
}

.sb-tiku-list a {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 6px;
    padding: 8px 10px;
    border-radius: var(--r-lg);
    background: var(--primary-100);
    text-decoration: none;
    transition: background .1s
}

.sb-tiku-list a:hover {
    background: var(--primary-200)
}

.sb-tiku-list .sti-icon {
    width: 27px;
    height: 28px;
    flex-shrink: 0
}

.sb-tiku-list .sti-icon img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain
}

.sb-tiku-list .sti-info {
    min-width: 0;
    flex: 1
}

.sb-tiku-list .sti-info .sti-t {
    font-size: 14px;
    font-weight: 500;
    color: var(--n1);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis
}

.sb-tiku-list .sti-info .sti-d {
    font-size: 12px;
    color: var(--n4);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 1px
}

.sb-tiku-btn {
    display: block;
    text-align: center;
    height: 40px;
    line-height: 40px;
    background: var(--primary);
    color: #fff;
    font-size: 14px;
    border-radius: 20px;
    margin-top: var(--sp-3);
    text-decoration: none;
    transition: background .1s
}

.sb-tiku-btn:hover {
    background: var(--primary-300);
    text-decoration: none;
    color: #fff
}

/* ===== WeChat Modal ===== */
.wx-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .45);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s, visibility .2s
}

.wx-modal-overlay.open {
    opacity: 1;
    visibility: visible
}

.wx-modal {
    position: relative;
    background: #fff;
    border-radius: 16px;
    padding: 32px 28px 24px;
    width: 320px;
    max-width: 90vw;
    text-align: center;
    box-shadow: 0 12px 48px rgba(0, 0, 0, .2);
    transform: translateY(12px);
    transition: transform .2s
}

.wx-modal-overlay.open .wx-modal {
    transform: translateY(0)
}

.wx-modal__close {
    position: absolute;
    top: 8px;
    right: 12px;
    width: 32px;
    height: 32px;
    border: none;
    background: none;
    font-size: 22px;
    color: var(--n3);
    cursor: pointer;
    line-height: 1
}

.wx-modal__close:hover {
    color: var(--n1)
}

.wx-modal__qr {
    width: 180px;
    height: 180px;
    margin: 0 auto 16px;
    border-radius: 12px;
    overflow: hidden
}

.wx-modal__qr img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain
}

.wx-modal__title {
    font-size: 16px;
    color: var(--n2);
    margin-bottom: 14px
}

.wx-modal__title .wx-modal__hl {
    font-size: 17px;
    font-weight: 600;
    color: var(--primary)
}

.wx-modal__tags {
    display: flex;
    justify-content: center;
    gap: var(--sp-4);
    flex-wrap: wrap
}

.wx-modal__tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    color: var(--n3)
}

.wx-modal__tag .wx-modal__icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0
}

/* ===== Footer ===== */
.site-footer {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.65);
    background: #363c41;
    padding: 32px 0
}

.site-footer .container {
    width: 1200px;
    margin: 0 auto
}

.footer-main {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0
}

.footer-links {
    display: flex;
    gap: 60px
}

.footer-links__col {
    list-style: none;
    padding: 0;
    margin: 0
}

.footer-links__col li {
    margin-bottom: 10px;
    line-height: 1.5
}

.footer-links__col li:last-child {
    margin-bottom: 0
}

.footer-links__col li:first-child {
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 18px
}

.footer-links__col li a {
    color: rgba(255, 255, 255, 0.65);
    text-decoration: none;
    transition: color .2s
}

.footer-links__col li a:hover {
    color: #fff
}

.footer-contact {
    text-align: center
}

.footer-contact__title {
    font-size: 16px;
    color: #fff;
    font-weight: 600;
    margin-bottom: 18px
}

.footer-contact__info {
    margin-bottom: 20px
}

.footer-contact__info p {
    line-height: 2;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.65)
}

.footer-contact__phone {
    color: #fff;
    font-style: normal;
    font-weight: 600
}

.footer-contact__btn {
    display: inline-block;
    width: 160px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    background: var(--accent-1);
    color: #fff;
    font-size: 14px;
    border-radius: 4px;
    text-decoration: none;
    transition: all .2s
}

.footer-contact__btn:hover {
    background: var(--accent-2);
    box-shadow: 0 4px 8px rgba(255, 87, 34, 0.5);
    color: #fff
}

.footer-qrcode {
    display: flex;
    gap: 38px
}

.footer-qrcode__item {
    text-align: center;
    color: rgba(255, 255, 255, 0.8)
}

.footer-qrcode__img {
    width: 100px;
    height: 100px;
    margin-bottom: 16px;
    display: block;
    border-radius: 4px
}

.footer-qrcode__text {
    color: rgba(255, 255, 255, 0.65);
    font-size: 12px
}

.footer-bottom {
    padding: 20px 0 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center
}

.footer-bottom p {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.35);
    line-height: 28px;
    margin: 0 auto;
    display: inline-block
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.65);
    text-decoration: none;
    transition: color .2s
}

.footer-bottom a:hover {
    color: #fff
}

/* ===== Detail page styles ===== */
.guide-box {
    background: var(--n6);
    border-radius: var(--r-xl);
    box-shadow: var(--shadow-card);
    margin-bottom: var(--sp-6);
    overflow: hidden
}

.guide-box__tab-nav {
    display: flex;
    background: var(--n6);
    border-bottom: 1px solid var(--n5)
}

.guide-box__tab-nav:has(> a:only-child) {
    padding: var(--sp-4) var(--sp-5);
    font-size: 16px;
    font-weight: 600;
    color: var(--n1);
    display: flex;
    align-items: center;
    gap: var(--sp-2)
}

.guide-box__tab-nav:has(> a:only-child)::before {
    content: '';
    width: 4px;
    height: 18px;
    background: var(--primary);
    border-radius: var(--r-sm);
    flex-shrink: 0
}

.guide-box__tab-nav:has(> a:only-child) > a {
    border-bottom: none;
    font-size: 16px;
    font-weight: 600;
    color: var(--n1);
    padding: 0;
    flex: none;
    cursor: default
}

.guide-box__tab-nav:has(> a:only-child) > a:hover {
    color: var(--n1)
}

.guide-box__tab {
    flex: 1;
    text-align: center;
    padding: 10px 4px;
    font-size: 13px;
    font-weight: 500;
    color: var(--n3);
    cursor: pointer;
    transition: all .15s;
    position: relative;
    text-decoration: none;
    border-bottom: 3px solid transparent
}

.guide-box__tab:hover {
    color: var(--primary);
    text-decoration: none
}

.guide-box__tab.active {
    color: var(--primary);
    background: var(--n6);
    font-weight: 600;
    border-bottom-color: var(--primary)
}

.guide-box__panel {
    display: none;
    padding: var(--sp-3)
}

.guide-box__panel.active {
    display: block
}

.guide-arts {
    display: flex;
    flex-direction: column;
    gap: 0
}

.guide-arts__item {
    display: flex;
    align-items: flex-start;
    gap: 6px;
    padding: 8px 0;
    border-bottom: 1px dashed var(--n5);
    text-decoration: none;
    transition: color .1s
}

.guide-arts__item:last-child {
    border-bottom: none
}

.guide-arts__item:hover {
    text-decoration: none
}

.guide-arts__dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--n5);
    flex-shrink: 0;
    margin-top: 7px;
    transition: background .15s
}

.guide-arts__item:hover .guide-arts__dot {
    background: var(--primary)
}

.guide-arts__item.hot .guide-arts__dot {
    background: var(--error)
}

.guide-arts__title {
    flex: 1;
    font-size: 13px;
    color: var(--n2);
    line-height: 1.5;
    transition: color .1s;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical
}

.guide-arts__item:hover .guide-arts__title {
    color: var(--primary)
}

.guide-arts__item.hot .guide-arts__title {
    color: var(--error);
    font-weight: 500
}

.guide-courses {
    display: flex;
    flex-direction: column;
    gap: 10px
}

.guide-course {
    display: flex;
    gap: 10px;
    padding: 8px;
    border-radius: var(--r-lg);
    background: var(--primary-50);
    text-decoration: none;
    transition: all .15s;
    border: 1px solid transparent
}

.guide-course:hover {
    background: var(--primary-100);
    border-color: var(--primary-200);
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: var(--shadow-card)
}

.guide-course__cover {
    width: 80px;
    height: 50px;
    border-radius: var(--r-sm);
    overflow: hidden;
    flex-shrink: 0;
    position: relative;
    background: var(--sec-4)
}

.guide-course__cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block
}

.guide-course__cover-tag {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2px 4px;
    background: rgba(0, 0, 0, .55);
    color: #fff;
    font-size: 10px;
    text-align: center;
    line-height: 1.2
}

.guide-course__info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: center
}

.guide-course__name {
    font-size: 13px;
    font-weight: 500;
    color: var(--n1);
    line-height: 1.4;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical
}

.guide-course:hover .guide-course__name {
    color: var(--primary)
}

.guide-course__meta {
    font-size: 11px;
    color: var(--n4);
    margin-top: 3px
}

.guide-tools {
    display: grid;
    grid-template-columns:repeat(3, 1fr);
    gap: 0;
    border: 1px solid var(--n5);
    border-radius: var(--r-lg);
    overflow: hidden
}

.guide-tool {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 12px 6px;
    background: var(--n6);
    text-decoration: none;
    transition: all .15s;
    text-align: center;
    border-right: 1px solid var(--n5);
    border-bottom: 1px solid var(--n5)
}

.guide-tool:nth-child(3n) {
    border-right: none
}

.guide-tool:hover {
    background: var(--primary-200);
    text-decoration: none;
    z-index: 1
}

.guide-tool__icon {
    width: 52px;
    height: 52px;
    border-radius: var(--r-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0
}

.guide-tool__icon img {
    width: 40px;
    height: 40px
}

.guide-tool__name {
    font-size: 13px;
    font-weight: 500;
    color: var(--n1);
    line-height: 1.3
}

.guide-tool:hover .guide-tool__name {
    color: var(--primary)
}

.guide-tool__badge {
    position: absolute;
    top: 4px;
    right: 4px;
    height: 16px;
    line-height: 16px;
    padding: 0 6px;
    border-radius: 8px;
    font-size: 10px;
    font-weight: 500;
    background: var(--accent-1);
    color: #fff
}

.rec-mat-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
    border-radius: var(--r-lg);
    background: var(--primary-50)
}

.rec-mat-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--r-sm);
    flex-shrink: 0;
    overflow: hidden
}

.rec-mat-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block
}

.rec-mat-info {
    flex: 1;
    min-width: 0
}

.rec-mat-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--n1);
    line-height: 1.4;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical
}

.rec-mat-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 3px
}

.rec-mat-tag-free {
    display: inline-block;
    height: 18px;
    line-height: 18px;
    padding: 0 6px;
    border-radius: 3px;
    font-size: 11px;
    font-weight: 500;
    background: var(--accent-3);
    color: var(--accent-2)
}

.rec-mat-size {
    font-size: 11px;
    color: var(--n4)
}

.rec-mat-btn {
    display: inline-block;
    height: 28px;
    line-height: 28px;
    padding: 0 12px;
    border-radius: 14px;
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    text-decoration: none;
    white-space: nowrap;
    flex-shrink: 0;
    text-align: center
}

.rec-mat-btn:hover {
    background: var(--primary-300);
    color: #fff;
    text-decoration: none
}

.study-tabs {
    margin: var(--sp-5) 0;
    background: var(--primary-50);
    border-radius: var(--r-2xl);
    padding: var(--sp-5)
}

.tab-nav {
    display: flex;
    gap: var(--sp-2);
    margin-bottom: var(--sp-4)
}

.tab-nav .tab {
    padding: var(--sp-2) var(--sp-5);
    font-size: 14px;
    font-weight: 500;
    color: var(--n3);
    cursor: pointer;
    border: none;
    background: #fff;
    border-radius: var(--r-lg);
    transition: all .15s;
    font-family: var(--font);
    box-shadow: var(--shadow-card)
}

.tab-nav .tab:hover {
    color: var(--primary)
}

.tab-nav .tab.active {
    color: #fff;
    background: var(--primary);
    font-weight: 600;
    box-shadow: none
}

.tab-panel {
    display: none
}

.tab-panel.active {
    display: block
}

.study-item {
    display: flex;
    align-items: center;
    gap: var(--sp-4);
    padding: var(--sp-4);
    border-radius: var(--r-xl);
    background: #fff;
    margin-bottom: var(--sp-2);
    transition: box-shadow .15s, transform .15s
}

.study-item:last-child {
    margin-bottom: 0
}

.study-item:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-1px);
    text-decoration: none;
}

.study-item .si-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--r-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0
}

.study-item .si-icon svg {
    width: 24px;
    height: 24px
}

.study-item .si-info {
    flex: 1;
    min-width: 0
}

.study-item .si-title {
    font-size: 15px;
    font-weight: 500;
    color: var(--n1)
}

.study-item .si-meta {
    font-size: 12px;
    color: var(--n4);
    margin-top: 3px
}

.study-item .si-btn {
    height: 36px;
    line-height: 36px;
    padding: 0 var(--sp-5);
    font-size: 13px;
    font-weight: 500;
    border-radius: var(--r-lg);
    border: none;
    cursor: pointer;
    font-family: var(--font);
    white-space: nowrap;
    transition: opacity .15s
}

.study-item .si-btn.primary {
    background: var(--primary);
    color: #fff
}

.study-item .si-btn.primary:hover {
    background: var(--primary-300)
}

.study-item .si-btn.outline {
    background: #fff;
    color: var(--primary);
    border: 1px solid var(--primary)
}

.study-item .si-btn.outline:hover {
    background: var(--primary-50)
}

.study-item .si-cover {
    width: 96px;
    height: 60px;
    border-radius: var(--r-md);
    overflow: hidden;
    flex-shrink: 0;
    position: relative
}

.study-item .si-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block
}

.study-item .si-cover .si-cover-title {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, .35);
    color: #fff;
    font-size: 12px;
    font-weight: 500;
    text-align: center;
    padding: 4px 6px;
    line-height: 1.3;
    word-break: break-all
}

.guide-tool-popup {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .45);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s, visibility .2s
}

.guide-tool-popup.open {
    opacity: 1;
    visibility: visible
}

.guide-tool-popup__inner {
    position: relative;
    background: #fff;
    border-radius: 16px;
    padding: 32px 28px 24px;
    width: 320px;
    max-width: 90vw;
    text-align: center;
    box-shadow: 0 12px 48px rgba(0, 0, 0, .2);
    transform: translateY(12px);
    transition: transform .2s
}

.guide-tool-popup.open .guide-tool-popup__inner {
    transform: translateY(0)
}

.guide-tool-popup__close {
    position: absolute;
    top: 8px;
    right: 12px;
    width: 32px;
    height: 32px;
    border: none;
    background: none;
    font-size: 22px;
    color: var(--n3);
    cursor: pointer;
    line-height: 1
}

.guide-tool-popup__close:hover {
    color: var(--n1)
}

.guide-tool-popup__qrcode {
    width: 180px;
    height: 180px;
    margin: 0 auto;
    border-radius: 12px;
    overflow: hidden
}

.guide-tool-popup__qrcode img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain
}

.guide-tool-popup__title {
    font-size: 17px;
    font-weight: 600;
    color: var(--n1);
    margin-bottom: 6px
}

.guide-tool-popup__subtitle {
    font-size: 14px;
    color: var(--n3);
    margin-bottom: 12px
}

.guide-tool-popup__desc {
    font-size: 12px;
    color: var(--n4);
    padding-top: 12px;
    border-top: 1px solid var(--n5)
}

.ad_div .myadvertise {
    position: relative
}

.gg_wz {
    position: absolute;
    right: 10px;
    bottom: 0;
    width: 30px;
    height: 14px;
    line-height: 14px;
    text-align: center;
    font-size: 10px !important;
    background: rgba(0, 0, 0, .3);
    z-index: 2;
    color: #fff;
    -webkit-transform-origin-x: 0;
    -webkit-transform: scale(.80)
}

.gg_sm {
    display: none !important;
    position: absolute;
    right: 0;
    bottom: 0;
    width: 14px;
    height: 14px;
    line-height: 14px;
    text-align: center;
    font-size: 10px !important;
    border-radius: 16px;
    background: rgba(0, 0, 0, .3);
    z-index: 99;
    color: #fff;
    font-family: Arial;
    -webkit-transform-origin-x: 0;
    -webkit-transform: scale(.80);
    cursor: pointer
}

.adv_closeIcon {
    position: absolute;
    right: 5px;
    top: 5px;
    width: 20px;
    height: 20px;
    background: url(https://lstatic.xisaiwang.com/educity/pc/www/images/close.png) center no-repeat;
    background-size: 15px auto;
    z-index: 9;
    cursor: pointer
}

.detail-top-fixed.fixed {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 999
}

.detail-top-fixed img {
    width: 100% !important
}

.author-action-bar {
    display: flex;
    gap: 12px;
    margin: var(--sp-3) 0
}

.author-action-bar .action-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: var(--r-md);
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
    transition: all .15s;
    cursor: pointer;
    border: 1px solid transparent
}

.author-action-bar .action-btn svg {
    flex-shrink: 0
}

.author-action-bar .action-btn--wechat {
    color: #fff;
    background: #07c160;
    border-color: #07c160
}

.author-action-bar .action-btn--wechat:hover {
    background: #06ad56;
    border-color: #06ad56
}

.author-action-bar .action-btn--primary {
    color: #fff;
    background: var(--primary);
    border-color: var(--primary)
}

.author-action-bar .action-btn--primary:hover {
    background: #2b5ce6;
    border-color: #2b5ce6
}

.teacher-modal {
    width: 500px;
    padding: 20px;
    box-sizing: border-box;
}

.down-info-wrap {
    width: 88%;
    margin: 0 auto;
    padding-top: 25px;
    border-top: 1px solid #eee;
}

.down-info-wrap .down-info-left {
    margin-bottom: 15px;
    float: left !important;
    width: 250px;
}

.down-info-wrap .down-info {
    text-align: left;
    font-size: 14px;
    color: #666;
    line-height: 2;
}

.down-info-wrap .down-info-right {
    float: right !important;
    width: 150px;
}

.down-info-wrap .down-info-btn {
    line-height: 50px;
    width: 100%;
    margin-top: 20px;
    text-align: center;
    background-color: rgb(24, 144, 255);
    color: #fff;
    border-radius: 50px;
    font-size: 17px;
}

.down-info-wrap .down-info-btn a {
    color: #ffffff;
}

.teacher-qr-wrap {
    width: 150px;
    margin: 15px auto;
    margin-bottom: 0px;
}

.teacher-qr-code {
    width: 100%;
    height: auto;
    margin: 10px 0px;
}

.teacher-modal .p-text {
    text-align: center;
    font-size: 16px;
}

.site-header__login {
    position: relative;
}
.site-header__login img {
    display: inline-block;
    margin-right: 3px;
    vertical-align: middle;
    width: 24px;
    height: 24px;
    border-radius: 100%;
}
.site-header__login .un_sty#newname {
    max-width: 110px;
    display: inline-block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    vertical-align: middle;
    font-style: inherit;
}
.site-header__login .newlogin_ul {
    display: none;
    position: absolute;
    left: 0;
    top: 40px;
    min-width: 100px;
    padding: 0 0;
    box-sizing: border-box;
    background: rgba(255, 255, 255, 0.85);
    z-index: 9;
    border-radius: 6px;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
}
.site-header__login .newlogin_ul li a {
    color: #666;
    margin: 0 0 !important;
    text-align: center;
    display: block;
    line-height: 45px;
    border-bottom: 1px solid #eee;
    position: relative;
}

.site-header__login .newlogin_ul li:last-child a {
    border-bottom: 0;
}

.site-header__login:hover .newlogin_ul {
    display: block;
}

.site-header__login .newlogin_ul::after {
    position: absolute;
    content: '';
    left: 50%;
    top: -10px;
    margin-left: -10px;
    width: 0;
    height: 0;
    border-width: 0 10px 10px;
    border-style: solid;
    border-color: transparent transparent #fff;
}

.site-header__login .newlogin_ul .cirnum {
    box-sizing: border-box;
    color: #fff;
    background: red;
    font-size: 12px;
    border-radius: 50px;
    font-style: normal;
    display: inline-block;
    line-height: initial;
    min-width: 8px;
    min-height: 8px;
    position: absolute;
    top: 7px;
    padding: 0px 4px;
}

.cservice_wrap {
    width: auto;
    white-space: nowrap;
    cursor: pointer;
    display: block;
    position: fixed;
    right: 0px;
    bottom: 0px;
    z-index: 999;
    height: 42px;
    border-radius: 4px;
    overflow: hidden;
    background: rgb(31, 140, 235);
    box-shadow: rgba(0, 0, 0, 0.06) 0px 1px 6px, rgba(0, 0, 0, 0.16) 0px 2px 32px;
}

.cservice_info {
    position: relative;
    width: 42px;
    height: 42px;
    display: inline-block;
}

.cservice_icon {
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    z-index: 1;
    background: center center no-repeat;
    background-image: url(https://lstatic.xisaiwang.com/educity2/pc/images/courseDetail/cs_letter.png);
}

.cservice_iconAbs {
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    background: #000;
    opacity: 0.2;
    filter: alpha(opacity=20);
}

.cservice_num {
    position: absolute;
    top: 5px;
    right: 5px;
    z-index: 10;
    height: 14px;
    min-width: 14px;
    line-height: 14px;
    border-radius: 7px;
    background: red;
    font-size: 12px;
    color: #FFFFFF;
    letter-spacing: 0.47px;
    text-align: center;
}

.cservice_middle {
    width: auto;
    font-weight: normal;
    display: inline-block;
    vertical-align: top;
    line-height: 42px;
    padding: 0 8px;
    font-size: 16px;
    color: #FFFFFF;
    letter-spacing: 0.83px;
    word-break: break-all;
    text-align: center;
}

.cservice_middle {
    width: auto;
    font-weight: normal;
    display: inline-block;
    vertical-align: top;
    line-height: 42px;
    padding: 0 8px;
    font-size: 16px;
    color: #FFFFFF;
    letter-spacing: 0.83px;
    word-break: break-all;
    text-align: center;
}

.cservice_window {
    display: inline-block;
    width: 42px;
    height: 42px;
    background: center center no-repeat;
    background-image: url(https://lstatic.xisaiwang.com/educity2/pc/images/courseDetail/cs_totop.png);
}

.ecv2_footer {
    font-size: 14px;
    color: #999999;
    background-color: #363c41;
}

.ecv2_footer_bottom {
    text-align: center;
    padding: 10px 0;
    border-top: 1px solid #42484d;
}

.ecv2_footer_bottom p {
    line-height: 28px;
    margin: 0 auto;
    display: inline-block;
    vertical-align: middle;
}

.ecv2_footer_top ol {
    float: left;
    margin-right: 160px;
}

.ecv2_footer_top {
    padding: 30px 0 20px;
    overflow: hidden
}

.ecv2_footer_top ol li {
    margin-bottom: 10px;
    list-style: none;
    padding-left: 0;
}

.ecv2_footer_top ol li:last-child {
    margin-bottom: 0;
}

.ecv2_footer_top ol li a {
    color: #9b9ea0;
}

.ecv2_footer_top ol li a:hover {
    color: #ff6a00;
}

.ecv2_footer_top ol li:first-child {
    color: #d7d8d9;
    margin-bottom: 18px;
}

.ecv2_footer_nextto {
    float: left;
    text-align: center;
}

.ecv2_footer_nextto h3 {
    font-size: 28px;
    color: #ffffff;
    opacity: 0.8;
    font-weight: normal;
}

.ecv2_footer_nextto span {
    color: #999;
    display: block;
    margin: 10px 0 30px;
}

.ecv2_footer_nextto dd a {
    display: inline-block;
    width: 160px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    color: #fff;
    background-color: #ff773a;
    border-radius: 4px;
}

.ecv2_footer_nextto dd a img {
    width: 17px;
    height: 20px;
    margin-right: 8px;
    vertical-align: middle;
}

.ecv2_footer_codes {
    float: right;
}

.ecv2_footer_codes li {
    float: left;
    margin-left: 38px;
    text-align: center;
    color: #cccccc;
}

.ecv2_footer_codes li>img {
    width: 100px;
    height: 100px;
    margin-bottom: 16px;
}

.ecv2_footer {
    font-size: 12px;
}

.ecv2_footer_top ol>li:first-child {
    font-size: 14px;
}

/*.ecv2_footer_top ol li a {
    color: #fff;
}*/

.ecv2_footer_nextto span {
    color: #fff;
}

.ecv2_footer_bottom p {
    color: #9b9ea0;
}

.ecv2_footer_nextto dd a {
    margin: 0 auto;
    width: 140px;
    text-align: center;
    line-height: 32px;
    background-color: #fd5f39;
    color: #fff;
    height: auto;
    border-radius: 0;
}

.ecv2_footer_nextto dd a img {
    width: 13px;
    height: auto;
}

.nextto_title {
    font-size: 14px;
    color: #D7D8D9;
    text-align: left;
}

.nextto_list {
    font-size: 12px;
    color: #9B9EA0;
    line-height: 26px;
    text-align: left;
    margin-top: 14px;
}

.nextto_phone {
    display: inline-block;
    font-size: 16px;
    font-style: normal;
}

.nextto_online {
    display: block;
    width: 96px;
    height: 32px;
    background: #FD5F39;
    border-radius: 6px;
    line-height: 32px;
    background-color: #FD5F39;
    color: #fff;
    text-align: center;
    margin-top: 14px;
    font-size: 12px;
}

.ecv2_footer .ecv2_footer_bottom a {
    color: #9b9ea0;
}

.ecv2_footer .ecv2_footer_bottom a:hover {
    color: #ff6a00;
}

.ecv2_footer .ecv2_footer_codes p {
    color: #fff;
}

.ecv2_container {
    width: 1200px;
    margin: 0 auto;
}

.pull-left {
    float: left !important;
}
.ad_l {
    width: 70px;
    height: 70px;
}
.pull-left {
    float: left !important;
}

.clearfix:after {
    content: "";
    display: block;
    height: 0;
    clear: both;
    visibility: hidden;
}
.ad_r p {
    font-size: 18px;
    margin: 8px 10px;
    font-weight: 600;
}
.mfsx {
    border: 1px solid #ff908a;
    padding: 5px 10px;
    border-radius: 8px;
    color: #ff908a;
    position: absolute;
    right: 30px;
    top: 30px;
    line-height: 22px;
    cursor: pointer;
}
.pc-pop-login, .pc-pop-login iframe {
    border-radius: 20px !important;
}

.authority-source {
    margin: var(--sp-5) 0 0;
    padding: var(--sp-5);
    border: 1px solid #e8e8e8;
    border-radius: 8px;
    background: #fafafa;
}

#art-content img {
    display: inline-block;
}

#art-content table {
    width: 100%!important;
}

#art-content table>tbody>tr>td,
#art-content table>tbody>tr>th,
#art-content table>tfoot>tr>td,
#art-content table>tfoot>tr>th,
#art-content table>thead>tr>td,
#art-content table>thead>tr>th {
    border: 1px solid #ddd;
}

._xs-pop-wrap ._xs-pop-opa {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.2);
    z-index: 9999;
}

._xs-pop-wrap ._xs-pop-main {
    background-color: #fff;
    min-width: 450px;
    padding: 15px 25px;
    border-radius: 10px;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 99999;
}

._xs-pop-wrap._xs_aliyun_pop ._xs-pop-main {
    width: 500px;
    box-shadow: 0 0 10px #999;
}

._xs-pop-wrap ._xs-pop-step {
    position: absolute;
    bottom: -150px;
    left: 0;
    width: 100%;
    padding: 20px 0;
    background: #FFFFFF;
    border-radius: 10px;
    display: flex;
    justify-content: center;
}

._xs-pop-wrap ._xs-pop-step ._xs_icon {
    position: relative;
    font-size: 14px;
    box-sizing: border-box;
    margin: 0 30px;
    text-align: center;
}

._xs-pop-wrap ._xs-pop-step ._xs_icon::after {
    content: '';
    position: absolute;
    right: -35px;
    top: 14px;
    height: 19px;
    min-width: 19px;
    background-repeat: no-repeat;
    background-position: center;
    background-size: auto 19px;
    background-image: url('../img/xs_iconstep.png');
}

._xs-pop-wrap ._xs-pop-step ._xs_icon:last-child::after {
    width: 0;
    min-width: 0;
}

._xs-pop-wrap ._xs-pop-step ._xs_icon:nth-child(1) {
    color: #3977FF;
    cursor: pointer;
}

._xs-pop-wrap ._xs-pop-step ._xs_icon i {
    display: block;
    vertical-align: middle;
    width: auto;
    height: 40px;
    min-width: 40px;
    background-repeat: no-repeat;
    background-position: center;
    background-size: auto 40px;
    margin-bottom: 15px;
}

._xs-pop-wrap ._xs-pop-step ._xs_icon i._xs_icon1 {
    background-image: url('../img/xs_icon1.png');
}

._xs-pop-wrap ._xs-pop-step ._xs_icon i._xs_icon2 {
    background-image: url('../img/xs_icon2.png');
}

._xs-pop-wrap ._xs-pop-step ._xs_icon i._xs_icon3 {
    background-image: url('../img/xs_icon3.png');
}

._xs-pop-wrap ._xs-pop-step ._xs_icon:nth-child(1) i._xs_icon1 {
    background-image: url('../img/xs_icon1act.png');
}

/* ._xs-pop-wrap ._xs-pop-step ._xs_icon:hover i._xs_icon2 {
    background-image: url('../img/xs_icon2act.png');
}
._xs-pop-wrap ._xs-pop-step ._xs_icon:hover i._xs_icon3 {
    background-image: url('../img/xs_icon3act.png');
} */
._xs-pop-wrap ._xs-pop-title {
    font-size: 18px;
    font-weight: bold;
    text-align: center;
    padding-top: 23px;
    margin-bottom: 20px;
}

._xs-pop-wrap ._xs-pop-gou {
    font-size: 18px;
    font-weight: bold;
    color: #09BB07;
    text-align: center;
    margin-bottom: 20px;
    margin-top: 15px;
}

._xs-pop-wrap ._xs-pop-gou i {
    display: block;
    width: 50px;
    height: 50px;
    margin: 0 auto;
    margin-bottom: 10px;
    background: url(../img/_xs_gou.png) left top no-repeat;
    background-size: 100% auto;
}

._xs-pop-wrap ._xs-pop-cha {
    font-size: 18px;
    font-weight: bold;
    color: #FE3336;
    text-align: center;
    margin-bottom: 20px;
    margin-top: 15px;
}

._xs-pop-wrap ._xs-pop-cha i {
    display: block;
    width: 50px;
    height: 50px;
    margin: 0 auto;
    margin-bottom: 10px;
    background: url(../img/_xs_cha.png) left top no-repeat;
    background-size: 100% auto;
}

._xs-pop-wrap ._xs-pop-p1 {
    font-size: 15px;
    margin-bottom: 23px;
}

._xs-pop-wrap ._xs-pop-p2 {
    font-size: 18px;
    margin-bottom: 23px;
    margin-top: 23px;
}

._xs-pop-wrap ._xs-pop-img {
    margin-bottom: 23px;
}

._xs-pop-wrap ._xs-pop-img img {
    width: 200px;
    max-width: 200px;
    display: inline-block;
}

._xs-pop-wrap ._xs-pop-content {
    padding: 0 0;
    font-size: 15px;
    text-align: center;
}

._xs-pop-wrap ._xs-pop-main ._xs-pop-footer {
    display: flex;
    align-items: center;
    justify-content: center;
    padding-bottom: 13px;
}

._xs-pop-wrap._hide-footer ._xs-pop-main ._xs-pop-footer {
    display: none;
}

._xs-pop-wrap ._xs-pop-main ._xs-pop-footer .btn-default {
    min-width: 100px;
    height: 36px;
    border-radius: 18px;
    background-color: #EBF1FF;
    color: #3977FF;
    font-size: 14px;
    border: 0;
    outline: none;
    display: inline-block;
    text-align: center;
    line-height: 36px;
    cursor: pointer;
    margin: 0 10px;
    border: 1px solid #3977FF;
    box-sizing: border-box;
    padding: 0 20px;
}

._xs-pop-wrap ._xs-pop-main ._xs-pop-footer .btn-fresh {
    margin-top: 0.45rem;
}

._xs-pop-wrap ._xs-pop-main ._xs-pop-footer .btn-noclick {
    background-color: #D7D7D7 !important;
}

._xs-pop-wrap ._xs-pop-main ._xs-pop-footer .btn-fresh span {
    display: none;
}

._xs-pop-wrap ._xs-pop-main ._xs-pop-footer .btn-noclick span {
    display: inline-block;
}

._xs-pop-wrap ._xs-pop-main ._xs-pop-footer .btn-primary {
    min-width: 100px;
    padding: 0 20px;
    height: 36px;
    border-radius: 18px;
    background-color: #3977FF;
    color: #fff;
    font-size: 14px;
    outline: none;
    border: 0;
    display: inline-block;
    text-align: center;
    line-height: 36px;
    cursor: pointer;
    box-sizing: border-box;
}

._xs-pop-wrap ._xs-pop-main ._xs-pop-footer .btn-primary:hover {
    background-color: #5155ff;
}

._xs-pop-wrap ._xs-pop-main ._xs-pop-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 20px;
    height: 20px;
    cursor: pointer;
    background: url('https://lstatic.xisaiwang.com/educity2/pc/images/live/icon_m_close.png') center center no-repeat;
    background-size: 12px auto;
}

.artN_pop_tips {
    background: #F6F6F6;
    border-radius: 10px;
    padding: 12px;
    box-sizing: border-box;
    margin-top: 20px;
    font-size: 14px;
}