/* ==========================================
   ACCM资本市场 - 前台响应式样式
   主题色：橙色 #FF6B00
   ========================================== */

/* 全局重置 */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --primary: #FF6B00;
    --primary-dark: #E55A00;
    --primary-light: #FF8C33;
    --dark: #1A1A2E;
    --gray: #666666;
    --light-gray: #F5F5F5;
    --white: #FFFFFF;
    --border: #E0E0E0;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
    font-size: 15px;
    line-height: 1.7;
    color: #333;
    background: #FAFAFA;
}

a { color: var(--primary); text-decoration: none; transition: color 0.3s; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== 顶部导航栏 ===== */
.header {
    background: var(--white);
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.logo { display: flex; align-items: center; gap: 10px; }
.logo img { height: 40px; width: auto; }
.logo-text { font-size: 22px; font-weight: 800; color: var(--primary); letter-spacing: 1px; }

/* 主导航 */
.nav { display: flex; align-items: center; gap: 4px; }
.nav > li { position: relative; }
.nav > li > a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--dark);
    border-radius: 6px;
    transition: all 0.3s;
    cursor: pointer;
}
.nav > li > a:hover,
.nav > li > a.active { color: var(--primary); background: rgba(255,107,0,0.08); }

/* 下拉箭头 */
.nav > li.has-sub > a .arrow {
    display: inline-block;
    font-size: 9px;
    line-height: 1;
    transition: transform 0.3s ease;
    color: currentColor;
    margin-left: 2px;
}
.nav > li.has-sub:hover > a .arrow {
    transform: rotate(180deg);
}

/* 子菜单 */
.nav .sub-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 180px;
    background: var(--white);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    padding: 8px 0;
    z-index: 100;
    margin-top: 2px;
}
.nav .sub-menu::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 24px;
    width: 12px;
    height: 12px;
    background: #fff;
    transform: rotate(45deg);
    box-shadow: -2px -2px 6px rgba(0,0,0,0.04);
}
.nav > li:hover .sub-menu { display: block; }
.nav > li.open .sub-menu { display: block; }
.nav .sub-menu a {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
    color: var(--dark);
    white-space: nowrap;
    transition: all 0.25s;
}
.nav .sub-menu a:hover { color: var(--primary); background: rgba(255,107,0,0.06); padding-left: 24px; }

/* 顶部按钮区域 */
.header-actions { display: flex; align-items: center; gap: 10px; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 22px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.3s;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-dark); color: var(--white); transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: var(--white); }

/* QQ联系信息 */
.qq-bar {
    background: #FFF8F3;
    border-top: 1px solid #FFE0CC;
    font-size: 13px;
    color: var(--gray);
    padding: 6px 0;
}
.qq-bar .container { display: flex; justify-content: flex-end; align-items: center; gap: 20px; }
.qq-bar span { display: flex; align-items: center; gap: 4px; }
.qq-bar .icon { font-size: 15px; }

/* ===== 主视觉Banner ===== */
.hero {
    background: linear-gradient(135deg, #1A1A2E 0%, #2D2D44 50%, #1A1A2E 100%);
    color: var(--white);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}
.hero::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255,107,0,0.15) 0%, transparent 70%);
    border-radius: 50%;
}
.hero-content { position: relative; z-index: 1; max-width: 650px; }
.hero h1 { font-size: 42px; font-weight: 800; line-height: 1.3; margin-bottom: 20px; }
.hero h1 em { color: var(--primary); font-style: normal; }
.hero p { font-size: 17px; color: rgba(255,255,255,0.75); margin-bottom: 32px; line-height: 1.8; }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }

/* ===== 通用区块 ===== */
.section { padding: 70px 0; }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { font-size: 32px; font-weight: 800; color: var(--dark); margin-bottom: 12px; }
.section-title h2 em { color: var(--primary); font-style: normal; }
.section-title p { font-size: 16px; color: var(--gray); max-width: 600px; margin: 0 auto; }

/* ===== 平台介绍（左右布局） ===== */
.intro-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.intro-text .subtitle {
    display: inline-block;
    font-size: 13px;
    color: var(--primary);
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 14px;
    padding: 4px 14px;
    background: rgba(255,107,0,0.08);
    border-radius: 4px;
}
.intro-text h2 {
    font-size: 30px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 20px;
    line-height: 1.35;
}
.intro-text h2 em { color: var(--primary); font-style: normal; }
.intro-text p {
    font-size: 15px;
    color: #555;
    line-height: 1.9;
    margin-bottom: 14px;
}
.intro-text .intro-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 12px;
    font-weight: 600;
    color: var(--primary);
}
.intro-text .intro-more:hover { gap: 10px; }

.intro-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.stat-card {
    background: linear-gradient(135deg, #FFF8F3 0%, #FFEFE0 100%);
    border-radius: 14px;
    padding: 28px 22px;
    border-left: 4px solid var(--primary);
    transition: transform 0.3s;
}
.stat-card:hover { transform: translateY(-4px); }
.stat-card .num {
    font-size: 34px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 10px;
    letter-spacing: -1px;
}
.stat-card .num small { font-size: 18px; margin-left: 2px; }
.stat-card .label { font-size: 13px; color: #666; }

/* 功能卡片 */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card {
    background: var(--white);
    border-radius: 12px;
    padding: 36px 28px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    border: 1px solid transparent;
}
.feature-card:hover { transform: translateY(-5px); border-color: var(--primary); box-shadow: 0 8px 30px rgba(255,107,0,0.12); }
.feature-icon {
    width: 64px; height: 64px;
    margin: 0 auto 20px;
    background: rgba(255,107,0,0.1);
    border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    font-size: 28px;
}
.feature-card h3 { font-size: 18px; font-weight: 700; color: var(--dark); margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--gray); line-height: 1.8; }

/* ===== 账户类型对比 ===== */
.account-compare {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
    align-items: stretch;
}
.account-card {
    background: #fff;
    border-radius: 16px;
    padding: 34px 28px;
    box-shadow: var(--shadow);
    text-align: center;
    border: 2px solid transparent;
    position: relative;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
}
.account-card:hover { transform: translateY(-6px); box-shadow: 0 14px 40px rgba(0,0,0,0.1); }
.account-card.featured {
    border-color: var(--primary);
    box-shadow: 0 12px 40px rgba(255,107,0,0.18);
}
.account-card.featured::before {
    content: '★ 推荐';
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    padding: 4px 16px;
    border-radius: 12px;
    letter-spacing: 1px;
    white-space: nowrap;
}
.account-card h3 {
    font-size: 20px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 4px;
}
.account-card .tag {
    font-size: 12px;
    color: var(--gray);
    margin-bottom: 4px;
}
.account-card .price {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary);
    margin: 18px 0 6px;
    line-height: 1;
}
.account-card .price span {
    font-size: 14px;
    color: var(--gray);
    font-weight: 400;
    display: block;
    margin-top: 6px;
}
.account-features {
    margin: 24px 0;
    text-align: left;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 20px 0;
    flex: 1;
}
.account-features li {
    padding: 8px 0;
    font-size: 14px;
    color: #444;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    line-height: 1.6;
}
.account-features li::before {
    content: '✓';
    color: var(--primary);
    font-weight: 800;
    flex-shrink: 0;
    font-size: 15px;
}
.account-card .btn { width: 100%; padding: 12px 0; }

/* 交易品种表格 */
.platform-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}
.platform-table th {
    background: var(--primary);
    color: var(--white);
    padding: 14px 20px;
    font-size: 14px;
    font-weight: 600;
    text-align: left;
}
.platform-table td {
    padding: 14px 20px;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
    color: #444;
}
.platform-table tr:last-child td { border-bottom: none; }
.platform-table tr:hover td { background: #FFF8F3; }

/* ===== 全球办公室 ===== */
.office-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.office-card {
    background: #fff;
    border-radius: 12px;
    padding: 30px 26px;
    box-shadow: var(--shadow);
    border-top: 4px solid var(--primary);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}
.office-card::after {
    content: '';
    position: absolute;
    bottom: -30px;
    right: -30px;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(255,107,0,0.08), transparent 70%);
    border-radius: 50%;
}
.office-card:hover { transform: translateY(-5px); box-shadow: 0 12px 32px rgba(255,107,0,0.15); }
.office-card .flag {
    font-size: 34px;
    margin-bottom: 14px;
    display: inline-block;
    position: relative;
    z-index: 1;
}
.office-card h3 {
    font-size: 18px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 6px;
    position: relative;
    z-index: 1;
}
.office-card .city {
    font-size: 13px;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}
.office-card p {
    font-size: 13px;
    color: var(--gray);
    line-height: 1.8;
    position: relative;
    z-index: 1;
}
.office-card .office-contact {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px dashed var(--border);
    font-size: 12px;
    color: #888;
    position: relative;
    z-index: 1;
}

/* 新闻列表 */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}
.news-card:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(0,0,0,0.1); }
.news-card-img {
    width: 100%; height: 180px;
    background: linear-gradient(135deg, #FF6B00 0%, #FF8C33 100%);
    display: flex; align-items: center; justify-content: center;
    color: rgba(255,255,255,0.6);
    font-size: 40px;
    overflow: hidden;
}
.news-card-body { padding: 20px; }
.news-card-date { font-size: 13px; color: var(--gray); margin-bottom: 8px; }
.news-card h3 { font-size: 16px; font-weight: 700; color: var(--dark); margin-bottom: 10px; line-height: 1.5; }
.news-card p { font-size: 13px; color: var(--gray); line-height: 1.7; margin-bottom: 12px; }
.news-card .read-more { font-size: 13px; font-weight: 600; color: var(--primary); }

/* 文章详情 */
.article-detail { background: var(--white); border-radius: 12px; padding: 40px; box-shadow: var(--shadow); }
.article-detail h1 { font-size: 28px; font-weight: 800; color: var(--dark); margin-bottom: 16px; line-height: 1.4; }
.article-meta { font-size: 14px; color: var(--gray); margin-bottom: 28px; padding-bottom: 20px; border-bottom: 1px solid var(--border); }
.article-content { font-size: 15px; line-height: 1.9; color: #444; }
.article-content img { border-radius: 8px; margin: 16px 0; }
.article-content h2 { font-size: 22px; font-weight: 700; margin: 28px 0 14px; color: var(--dark); }
.article-content h3 { font-size: 18px; font-weight: 700; margin: 22px 0 10px; color: var(--dark); }
.article-content p { margin-bottom: 14px; }
.article-content ul, .article-content ol { padding-left: 24px; margin-bottom: 14px; }
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }

/* ===== 监管信息 ===== */
.regulation-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.regulation-card {
    background: linear-gradient(135deg, #1A1A2E 0%, #2D2D44 100%);
    border-radius: 14px;
    padding: 30px 26px;
    color: #fff;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s;
}
.regulation-card:hover { transform: translateY(-5px); }
.regulation-card::after {
    content: '';
    position: absolute;
    top: -40%;
    right: -30%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(255,107,0,0.28), transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}
.regulation-card .badge {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    font-weight: 800;
    padding: 5px 14px;
    border-radius: 6px;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
    letter-spacing: 1px;
}
.regulation-card h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}
.regulation-card p {
    font-size: 13px;
    color: rgba(255,255,255,0.75);
    line-height: 1.8;
    position: relative;
    z-index: 1;
    margin-bottom: 12px;
}
.regulation-card .license {
    font-size: 12px;
    color: var(--primary-light);
    margin-top: 14px;
    position: relative;
    z-index: 1;
    font-family: 'Courier New', monospace;
    padding-top: 12px;
    border-top: 1px solid rgba(255,255,255,0.12);
    letter-spacing: 0.5px;
}

/* ===== 平台历程时间轴 ===== */
.timeline {
    position: relative;
    padding-left: 44px;
    max-width: 860px;
    margin: 0 auto;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 11px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary) 0%, rgba(255,107,0,0.15) 100%);
}
.timeline-item {
    position: relative;
    margin-bottom: 36px;
    padding-bottom: 4px;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-item::before {
    content: '';
    position: absolute;
    left: -39px;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 4px rgba(255,107,0,0.15);
    z-index: 1;
}
.timeline-year {
    display: inline-block;
    font-size: 13px;
    font-weight: 800;
    color: #fff;
    background: var(--primary);
    padding: 3px 14px;
    border-radius: 20px;
    margin-bottom: 10px;
    letter-spacing: 1px;
}
.timeline-item h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}
.timeline-item p {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.85;
}

/* ===== 开户流程 ===== */
.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
    position: relative;
}
.step-item {
    text-align: center;
    padding: 34px 22px;
    background: #fff;
    border-radius: 14px;
    box-shadow: var(--shadow);
    position: relative;
    transition: all 0.3s;
}
.step-item:hover { transform: translateY(-5px); box-shadow: 0 12px 32px rgba(255,107,0,0.12); }
.step-num {
    width: 52px;
    height: 52px;
    margin: 0 auto 18px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 800;
    box-shadow: 0 6px 16px rgba(255,107,0,0.3);
}
.step-item h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}
.step-item p {
    font-size: 13px;
    color: var(--gray);
    line-height: 1.75;
}

/* ===== FAQ 手风琴 ===== */
.faq-list { max-width: 900px; margin: 0 auto; }
.faq-item {
    background: #fff;
    border-radius: 10px;
    margin-bottom: 14px;
    border: 1px solid var(--border);
    overflow: hidden;
    transition: box-shadow 0.3s, border-color 0.3s;
}
.faq-item[open] {
    border-color: var(--primary);
    box-shadow: 0 4px 18px rgba(255,107,0,0.08);
}
.faq-item summary {
    padding: 18px 56px 18px 24px;
    cursor: pointer;
    font-weight: 700;
    font-size: 15px;
    color: var(--dark);
    list-style: none;
    position: relative;
    transition: color 0.3s;
    line-height: 1.5;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::-moz-list-bullet { list-style: none; }
.faq-item summary:hover { color: var(--primary); }
.faq-item summary::after {
    content: '+';
    position: absolute;
    right: 22px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 24px;
    color: var(--primary);
    font-weight: 300;
    line-height: 1;
    transition: transform 0.3s;
}
.faq-item[open] summary::after {
    content: '−';
    transform: translateY(-50%) rotate(180deg);
}
.faq-item .faq-body {
    padding: 4px 24px 20px;
    color: #555;
    font-size: 14px;
    line-height: 1.9;
    border-top: 1px solid #F5F5F5;
    margin-top: -1px;
    padding-top: 16px;
}
.faq-item .faq-body p { margin-bottom: 10px; }
.faq-item .faq-body ul { padding-left: 20px; list-style: disc; margin-bottom: 10px; }

/* 分页 */
.pagination { display: flex; justify-content: center; gap: 6px; margin-top: 40px; flex-wrap: wrap; }
.pagination a, .pagination span {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 38px; height: 38px; padding: 0 12px;
    border-radius: 6px; font-size: 14px; font-weight: 500;
    background: var(--white); color: #444; border: 1px solid var(--border);
    transition: all 0.3s;
}
.pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination .current { background: var(--primary); color: var(--white); border-color: var(--primary); }

/* ===== 底部 ===== */
.footer {
    background: var(--white);
    border-top: 3px solid var(--primary);
    padding: 56px 0 0;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; margin-bottom: 40px; }
.footer h4 { font-size: 16px; font-weight: 700; color: var(--dark); margin-bottom: 18px; position: relative; padding-bottom: 10px; }
.footer h4::after { content: ''; position: absolute; bottom: 0; left: 0; width: 30px; height: 3px; background: var(--primary); border-radius: 2px; }
.footer p { font-size: 13px; color: var(--gray); line-height: 1.9; margin-bottom: 8px; }
.footer ul li { margin-bottom: 10px; }
.footer ul li a { font-size: 13px; color: var(--gray); }
.footer ul li a:hover { color: var(--primary); padding-left: 4px; }
.footer-contact li { display: flex; align-items: flex-start; gap: 8px; font-size: 13px; color: var(--gray); }

.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}
.footer-bottom p { font-size: 12px; color: #999; margin: 0; }
.footer-bottom .links { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-bottom .links a { font-size: 12px; color: #999; }

/* ===== 移动端底部固定按钮 ===== */
.mobile-bottom-bar {
    display: none;
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: var(--white);
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
    padding: 8px 16px;
    gap: 12px;
    z-index: 9999;
    padding-bottom: calc(8px + env(safe-area-inset-bottom, 0px));
}
.mobile-bottom-bar .btn { flex: 1; padding: 12px 0; font-size: 15px; border-radius: 8px; }

/* ===== 移动端汉堡菜单 ===== */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    background: none;
    border: none;
}
.hamburger span {
    display: block; width: 24px; height: 2px;
    background: var(--dark); border-radius: 2px; transition: all 0.3s;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .office-grid { grid-template-columns: repeat(2, 1fr); }
    .account-compare { grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .regulation-grid { grid-template-columns: repeat(2, 1fr); }
    .steps { grid-template-columns: repeat(2, 1fr); }
    .intro-block { gap: 40px; }
}

@media (max-width: 768px) {
    body { padding-bottom: 70px; font-size: 14px; }
    .mobile-bottom-bar { display: flex; }
    .hamburger { display: flex; }

    .nav {
        display: none;
        position: absolute;
        top: 68px; left: 0; right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 12px 16px;
        box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        gap: 0;
        max-height: calc(100vh - 68px);
        overflow-y: auto;
    }
    .nav.open { display: flex; }
    .nav > li { width: 100%; }
    .nav > li > a {
        padding: 13px 16px;
        border-radius: 8px;
        width: 100%;
        justify-content: space-between;
    }
    .nav > li.has-sub > a .arrow { margin-left: auto; }
    .nav > li.open > a .arrow { transform: rotate(180deg); }

    .nav .sub-menu {
        position: static;
        display: none;
        box-shadow: none;
        padding: 6px 0 6px 16px;
        margin: 0;
        background: var(--light-gray);
        border-radius: 8px;
        margin-top: 4px;
    }
    .nav .sub-menu::before { display: none; }
    .nav .sub-menu a { padding: 11px 16px; border-radius: 6px; }
    .nav .sub-menu a:hover { padding-left: 20px; background: rgba(255,107,0,0.08); }
    .nav > li:hover .sub-menu { display: none; }
    .nav > li.open .sub-menu { display: block; }

    .header-actions .btn { display: none; }
    .qq-bar .container { justify-content: center; flex-wrap: wrap; gap: 10px; }

    .hero { padding: 50px 0; }
    .hero h1 { font-size: 28px; }
    .hero p { font-size: 15px; }
    .hero-btns { flex-direction: column; }
    .hero-btns .btn { width: 100%; text-align: center; }

    .section { padding: 44px 0; }
    .section-title { margin-bottom: 32px; }
    .section-title h2 { font-size: 24px; }
    .features-grid { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .article-detail { padding: 24px 18px; }
    .article-detail h1 { font-size: 22px; }

    .office-grid { grid-template-columns: 1fr; }
    .account-compare { grid-template-columns: 1fr; gap: 20px; }
    .account-card.featured { transform: none; }
    .account-card.featured::before { top: -12px; }
    .regulation-grid { grid-template-columns: 1fr; }
    .steps { grid-template-columns: 1fr; }

    .intro-block { grid-template-columns: 1fr; gap: 32px; }
    .intro-text h2 { font-size: 24px; }
    .intro-stats { grid-template-columns: 1fr 1fr; gap: 14px; }
    .stat-card { padding: 20px 16px; }
    .stat-card .num { font-size: 26px; }

    .timeline { padding-left: 34px; }
    .timeline::before { left: 8px; }
    .timeline-item::before { left: -32px; width: 12px; height: 12px; }

    .faq-item summary { padding: 15px 48px 15px 18px; font-size: 14px; }
    .faq-item summary::after { right: 16px; font-size: 22px; }
    .faq-item .faq-body { padding: 14px 18px 18px; font-size: 13px; }

    .footer-bottom { flex-direction: column; text-align: center; }
    .footer-bottom .links { flex-wrap: wrap; justify-content: center; }
}

/* ===== 404页面 ===== */
.error-page {
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    min-height: 60vh; text-align: center; padding: 40px 20px;
}
.error-code { font-size: 120px; font-weight: 900; color: var(--primary); line-height: 1; margin-bottom: 16px; }
.error-page h1 { font-size: 24px; color: var(--dark); margin-bottom: 12px; }
.error-page p { font-size: 15px; color: var(--gray); margin-bottom: 28px; }

/* 面包屑 */
.breadcrumb { font-size: 13px; color: var(--gray); padding: 16px 0; }
.breadcrumb a { color: var(--gray); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { margin: 0 6px; }