/* =====================================================
 * 鸭圈雅思真题库
 * 与原站浅色风格形成差异化：暗夜蓝底 + 青/紫/粉渐变 + 毛玻璃
 * ===================================================== */
:root {
    --bg: #060913;
    --bg-2: #0a1020;
    --panel: rgba(148, 163, 184, 0.06);
    --panel-strong: rgba(148, 163, 184, 0.1);
    --border: rgba(148, 163, 184, 0.16);
    --text: #e2e8f0;
    --muted: #94a3b8;
    --cyan: #22d3ee;
    --violet: #818cf8;
    --pink: #e879f9;
    --grad: linear-gradient(135deg, #22d3ee 0%, #818cf8 55%, #e879f9 100%);
    --glow: 0 0 24px rgba(34, 211, 238, 0.25);
    --radius: 16px;
    --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background:
        radial-gradient(900px 480px at 12% -8%, rgba(34, 211, 238, 0.14), transparent 60%),
        radial-gradient(1000px 520px at 88% -12%, rgba(129, 140, 248, 0.16), transparent 62%),
        radial-gradient(760px 420px at 50% 118%, rgba(232, 121, 249, 0.1), transparent 60%),
        var(--bg);
    background-attachment: fixed;
    color: var(--text);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a { color: inherit; text-decoration: none; }

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

.container { width: min(1180px, 92%); margin: 0 auto; }

.site-main { flex: 1; }

/* ---------- 顶部提示条 ---------- */
.notice-bar {
    text-align: center;
    font-size: 13px;
    color: var(--muted);
    padding: 8px 16px;
    background: linear-gradient(90deg, rgba(34, 211, 238, 0.08), rgba(129, 140, 248, 0.1), rgba(232, 121, 249, 0.08));
    border-bottom: 1px solid rgba(148, 163, 184, 0.08);
}

.notice-cta {
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 700;
}

/* ---------- 头部导航 ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    background: rgba(6, 9, 19, 0.72);
    border-bottom: 1px solid transparent;
    transition: border-color 0.25s ease, background 0.25s ease;
}

.site-header.scrolled {
    background: rgba(6, 9, 19, 0.9);
    border-bottom-color: var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    gap: 28px;
    height: 66px;
}

.logo {
    font-size: 19px;
    font-weight: 800;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.logo span {
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.nav-menu {
    display: flex;
    gap: 4px;
    margin-right: auto;
}

.nav-link {
    padding: 8px 12px;
    border-radius: 10px;
    color: var(--muted);
    font-size: 15px;
    transition: color 0.2s ease, background 0.2s ease;
}

.nav-link:hover { color: var(--text); background: var(--panel-strong); }

.header-actions { display: flex; align-items: center; gap: 10px; }

.login-link { white-space: nowrap; }

.nav-toggle {
    display: none;
    background: var(--panel-strong);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 18px;
    width: 40px;
    height: 40px;
    cursor: pointer;
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 11px 26px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 700;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
    white-space: nowrap;
}

.btn-primary {
    background: var(--grad);
    color: #05070f;
    box-shadow: var(--glow);
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 34px rgba(129, 140, 248, 0.45); }

.btn-ghost {
    background: transparent;
    color: var(--text);
    border-color: var(--border);
}

.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }

.btn-light {
    background: #e6edf7;
    color: #05070f;
}

.btn-light:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(230, 237, 247, 0.22); }

.btn-sm { padding: 8px 18px; font-size: 14px; }

.btn-lg { padding: 14px 36px; font-size: 16px; }

.btn-block { width: 100%; }

/* ---------- 首页 Hero ---------- */
.hero {
    padding: 110px 0 90px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(148, 163, 184, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 163, 184, 0.05) 1px, transparent 1px);
    background-size: 46px 46px;
    mask-image: radial-gradient(ellipse 70% 62% at 50% 34%, #000 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse 70% 62% at 50% 34%, #000 30%, transparent 75%);
    pointer-events: none;
}

.hero-inner { position: relative; }

.hero-badge {
    display: inline-block;
    padding: 7px 18px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--panel);
    color: var(--cyan);
    font-size: 13px;
    letter-spacing: 3px;
    margin-bottom: 26px;
}

.hero-title {
    font-size: clamp(42px, 7vw, 76px);
    font-weight: 900;
    letter-spacing: 2px;
    line-height: 1.15;
    background: linear-gradient(120deg, #67e8f9 0%, #a5b4fc 45%, #f0abfc 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 60px rgba(129, 140, 248, 0.25);
}

.hero-sub {
    margin-top: 18px;
    font-size: clamp(16px, 2.4vw, 21px);
    color: var(--muted);
    letter-spacing: 6px;
}

.hero-actions { margin-top: 42px; display: flex; justify-content: center; gap: 18px; flex-wrap: wrap; }

.hero-stats {
    margin-top: 70px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.stat {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px 10px;
    backdrop-filter: blur(8px);
}

.stat b {
    display: block;
    font-size: 32px;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.stat span { font-size: 13px; color: var(--muted); }

/* ---------- 通用区块 ---------- */
.section { padding: 86px 0; }

.section-alt {
    background: linear-gradient(180deg, transparent, rgba(129, 140, 248, 0.05) 40%, transparent);
}

.section-title, .page-title { text-align: center; }

.section-title {
    font-size: 34px;
    font-weight: 800;
    letter-spacing: 2px;
}

.section-desc {
    text-align: center;
    color: var(--muted);
    margin-top: 10px;
    letter-spacing: 4px;
    font-size: 14px;
}

/* ---------- 首页：四大核心能力 ---------- */
.feature-grid {
    margin-top: 52px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
}

.feature-card {
    position: relative;
    padding: 34px 30px;
    border-radius: var(--radius);
    background: var(--panel);
    border: 1px solid var(--border);
    backdrop-filter: blur(10px);
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    overflow: hidden;
}

.feature-card::after {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--grad);
    opacity: 0;
    transition: opacity 0.25s ease;
}

.feature-card:hover {
    transform: translateY(-6px);
    border-color: rgba(34, 211, 238, 0.4);
    box-shadow: 0 18px 44px rgba(2, 6, 23, 0.6);
}

.feature-card:hover::after { opacity: 1; }

.feature-icon { font-size: 34px; margin-bottom: 14px; }

.feature-card h3 {
    font-size: 21px;
    margin-bottom: 12px;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.feature-card p { color: var(--muted); font-size: 15px; text-align: justify; }

/* ---------- 首页：四科入口 ---------- */
.subject-grid {
    margin-top: 52px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}

.subject-card {
    display: block;
    padding: 30px 24px;
    border-radius: var(--radius);
    background: var(--panel);
    border: 1px solid var(--border);
    transition: transform 0.25s ease, border-color 0.25s ease;
}

.subject-card:hover { transform: translateY(-6px); border-color: rgba(232, 121, 249, 0.45); }

.subject-icon { font-size: 34px; }

.subject-card h3 { font-size: 19px; margin: 14px 0 10px; }

.subject-card p { color: var(--muted); font-size: 13.5px; min-height: 66px; }

.subject-more {
    display: inline-block;
    margin-top: 8px;
    color: var(--cyan);
    font-size: 14px;
    font-weight: 600;
}

/* ---------- CTA 横幅 ---------- */
.cta-band {
    padding: 90px 0;
    text-align: center;
    background:
        radial-gradient(600px 300px at 50% 50%, rgba(129, 140, 248, 0.16), transparent 70%),
        linear-gradient(180deg, transparent, rgba(34, 211, 238, 0.04), transparent);
}

.cta-band h2 {
    font-size: clamp(28px, 4vw, 40px);
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.cta-band p { color: var(--muted); margin: 16px 0 34px; }

/* ---------- 页脚 ---------- */
.site-footer {
    border-top: 1px solid var(--border);
    background: rgba(4, 7, 15, 0.8);
    padding: 44px 0 34px;
    margin-top: auto;
}

.footer-brand { font-weight: 800; font-size: 17px; }

.footer-brand span { color: var(--muted); font-weight: 400; font-size: 13.5px; margin-left: 12px; }

.footer-copy { color: var(--muted); font-size: 13.5px; margin-top: 14px; }

.footer-disclaimer {
    margin-top: 18px;
    color: rgba(148, 163, 184, 0.65);
    font-size: 12px;
    line-height: 1.8;
    text-align: justify;
}

/* ---------- 内页 Hero ---------- */
.page-hero {
    padding: 72px 0 50px;
    text-align: center;
    background:
        radial-gradient(700px 320px at 50% -20%, rgba(34, 211, 238, 0.12), transparent 65%);
    border-bottom: 1px solid rgba(148, 163, 184, 0.08);
}

.page-hero-sm { padding: 56px 0 42px; }

.crumb { font-size: 13px; color: var(--muted); margin-bottom: 16px; }

.crumb span { color: var(--cyan); }

.page-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    letter-spacing: 1px;
}

.subject-icon-lg { font-size: 0.85em; margin-right: 6px; }

.page-desc {
    max-width: 760px;
    margin: 16px auto 0;
    color: var(--muted);
    font-size: 15px;
}

.page-tags { margin-top: 22px; display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; }

.pill {
    padding: 6px 16px;
    border-radius: 999px;
    font-size: 13px;
    color: #c7d2fe;
    background: rgba(129, 140, 248, 0.12);
    border: 1px solid rgba(129, 140, 248, 0.3);
}

.pill-sm { padding: 3px 12px; font-size: 12px; }

.paper-info { margin-top: 22px; display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; }

/* ---------- 科目页：真题列表 ---------- */
.list-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 28px;
    align-items: start;
}

.block-title {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 1px;
    margin-bottom: 20px;
    padding-left: 14px;
    border-left: 4px solid;
    border-image: var(--grad) 1;
}

.block-title small { color: var(--muted); font-size: 13px; font-weight: 400; margin-left: 10px; }

.block-title em { color: var(--muted); font-size: 13px; font-style: normal; font-weight: 400; margin-left: 10px; }

.paper-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px 26px;
    border-radius: var(--radius);
    background: var(--panel);
    border: 1px solid var(--border);
    margin-bottom: 16px;
    transition: border-color 0.25s ease, transform 0.25s ease;
}

.paper-card:hover { border-color: rgba(34, 211, 238, 0.4); transform: translateX(4px); }

.paper-main { flex: 1; min-width: 0; }

.paper-card h3 a { font-size: 18px; }

.paper-card h3 a:hover { color: var(--cyan); }

.paper-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 22px;
    margin-top: 12px;
    color: var(--muted);
    font-size: 13.5px;
}

.freq {
    padding: 2px 12px;
    border-radius: 999px;
    font-size: 12.5px;
    font-weight: 600;
}

.freq-high { color: #fda4af; background: rgba(244, 63, 94, 0.14); border: 1px solid rgba(244, 63, 94, 0.35); }

.freq-medium { color: #fcd34d; background: rgba(251, 191, 36, 0.12); border: 1px solid rgba(251, 191, 36, 0.32); }

.freq-low { color: #94a3b8; background: rgba(148, 163, 184, 0.12); border: 1px solid rgba(148, 163, 184, 0.3); }

.freq-inline { font-weight: 700; }

/* ---------- 科目页：侧栏 ---------- */
.side-panel {
    position: sticky;
    top: 92px;
    padding: 26px;
    border-radius: var(--radius);
    background: var(--panel);
    border: 1px solid var(--border);
}

.side-panel h3 { font-size: 17px; margin-bottom: 16px; }

.mode-list { list-style: none; }

.mode-list li { margin-bottom: 16px; }

.mode-list b {
    display: block;
    color: var(--cyan);
    font-size: 14.5px;
    margin-bottom: 4px;
}

.mode-list span { color: var(--muted); font-size: 13px; display: block; }

/* ---------- 试卷详情 ---------- */
.paper-section { margin-bottom: 44px; }

.question {
    padding: 26px 28px;
    border-radius: var(--radius);
    background: var(--panel);
    border: 1px solid var(--border);
    margin-bottom: 18px;
}

.q-head { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }

.q-no { font-weight: 800; color: var(--cyan); font-size: 16px; }

.q-type {
    font-size: 12px;
    color: #c7d2fe;
    background: rgba(129, 140, 248, 0.12);
    border: 1px solid rgba(129, 140, 248, 0.3);
    padding: 2px 12px;
    border-radius: 999px;
}

.q-stem { font-size: 16px; font-weight: 600; margin-bottom: 14px; }

.options { list-style: none; display: grid; gap: 10px; }

.options li {
    padding: 12px 16px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: rgba(148, 163, 184, 0.04);
    font-size: 15px;
}

.options li b { color: var(--cyan); margin-right: 8px; }

.options li.is-answer {
    border-color: rgba(52, 211, 153, 0.55);
    background: rgba(16, 185, 129, 0.08);
}

.ans-mark { color: #34d399; font-weight: 700; font-size: 13px; margin-left: 10px; }

.analysis {
    margin-top: 18px;
    padding: 20px 22px;
    border-radius: 12px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(34, 211, 238, 0.25);
    border-left: 4px solid #22d3ee;
}

.analysis-title { font-weight: 800; color: var(--cyan); margin-bottom: 12px; }

.analysis p { color: #cbd5e1; font-size: 14px; margin-bottom: 10px; }

.analysis b { color: var(--text); }

.key-sentence {
    padding: 12px 16px;
    border-radius: 10px;
    background: rgba(34, 211, 238, 0.06);
    color: #a5f3fc;
    font-size: 14px;
    margin-bottom: 12px;
    font-style: italic;
}

.grammar { color: #94a3b8; font-style: normal; margin-top: 8px; }

.syn-table { width: 100%; border-collapse: collapse; font-size: 13.5px; margin-top: 6px; }

.syn-table th, .syn-table td {
    padding: 8px 14px;
    text-align: left;
    border-bottom: 1px solid rgba(148, 163, 184, 0.14);
}

.syn-table th { color: var(--cyan); font-weight: 700; }

.syn-table td { color: #cbd5e1; }

.paper-tip {
    margin-top: 30px;
    padding: 20px 24px;
    border-radius: var(--radius);
    background: linear-gradient(90deg, rgba(129, 140, 248, 0.1), rgba(232, 121, 249, 0.08));
    border: 1px solid rgba(129, 140, 248, 0.3);
    color: #c7d2fe;
    font-size: 14px;
}

.paper-tip a { color: var(--pink); font-weight: 700; margin-left: 6px; }

/* ---------- 词汇页 ---------- */
.vocab-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 26px;
    flex-wrap: wrap;
}

.vocab-search {
    flex: 1;
    min-width: 240px;
    padding: 12px 20px;
    border-radius: 999px;
    background: var(--panel);
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 15px;
    outline: none;
}

.vocab-search:focus { border-color: var(--cyan); }

.vocab-count { color: var(--muted); font-size: 13.5px; }

.word-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }

.word-card {
    padding: 24px;
    border-radius: var(--radius);
    background: var(--panel);
    border: 1px solid var(--border);
    transition: border-color 0.25s ease, transform 0.25s ease;
}

.word-card:hover { transform: translateY(-4px); border-color: rgba(34, 211, 238, 0.4); }

.word-card.status-learning { border-color: rgba(251, 191, 36, 0.45); }

.word-card.status-mastered { border-color: rgba(52, 211, 153, 0.5); }

.word-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }

.word-top h3 {
    font-size: 20px;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.phonetic { color: var(--muted); font-size: 13.5px; margin-top: 4px; }

.meaning { margin-top: 10px; font-size: 14.5px; }

.meaning b { color: var(--cyan); margin-right: 6px; }

.example { margin-top: 12px; color: #a5f3fc; font-size: 13.5px; font-style: italic; }

.example-cn { color: var(--muted); font-size: 13px; margin-top: 4px; }

.word-actions { margin-top: 16px; }

.status-btn {
    padding: 6px 18px;
    border-radius: 999px;
    font-size: 13px;
    cursor: pointer;
    background: transparent;
    color: var(--muted);
    border: 1px solid var(--border);
}

.status-btn[data-status="learning"] { color: #fcd34d; border-color: rgba(251, 191, 36, 0.5); }

.status-btn[data-status="mastered"] { color: #34d399; border-color: rgba(52, 211, 153, 0.5); }

/* ---------- 模考页 ---------- */
.mock-card {
    display: flex;
    align-items: center;
    gap: 22px;
    padding: 26px 30px;
    border-radius: var(--radius);
    background: var(--panel);
    border: 1px solid var(--border);
    margin-bottom: 16px;
    transition: border-color 0.25s ease, transform 0.25s ease;
}

.mock-card:hover { border-color: rgba(232, 121, 249, 0.4); transform: translateX(4px); }

.mock-main { flex: 1; }

.mock-card h3 { font-size: 19px; }

.mock-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 22px;
    margin-top: 12px;
    color: var(--muted);
    font-size: 13.5px;
}

/* ---------- 课程页 ---------- */
.course-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }

.course-card {
    padding: 28px;
    border-radius: var(--radius);
    background: var(--panel);
    border: 1px solid var(--border);
    transition: border-color 0.25s ease, transform 0.25s ease;
}

.course-card:hover { transform: translateY(-5px); border-color: rgba(34, 211, 238, 0.4); }

.course-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }

.pill-type {
    color: #f0abfc;
    background: rgba(232, 121, 249, 0.12);
    border-color: rgba(232, 121, 249, 0.35);
}

.price { font-weight: 800; color: #34d399; font-size: 19px; }

.price del { color: var(--muted); font-size: 13px; font-weight: 400; margin-left: 6px; }

.price.free { color: #22d3ee; }

.course-card h3 { font-size: 19px; margin-bottom: 12px; }

.course-meta { display: flex; gap: 20px; color: var(--muted); font-size: 13.5px; margin-bottom: 10px; }

.suit { color: var(--muted); font-size: 13.5px; margin-bottom: 20px; }

/* ---------- 登录 / 注册 ---------- */
.auth-wrap { display: flex; align-items: center; justify-content: center; padding: 90px 16px; }

.auth-card {
    width: min(460px, 100%);
    padding: 42px 40px;
    border-radius: 20px;
    background: var(--panel);
    border: 1px solid var(--border);
    backdrop-filter: blur(12px);
    box-shadow: 0 24px 60px rgba(2, 6, 23, 0.55);
}

.auth-card h1 {
    font-size: 26px;
    text-align: center;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.auth-sub { text-align: center; color: var(--muted); font-size: 13px; margin: 10px 0 26px; }

.form-error {
    padding: 12px 16px;
    border-radius: 10px;
    background: rgba(244, 63, 94, 0.1);
    border: 1px solid rgba(244, 63, 94, 0.4);
    color: #fda4af;
    font-size: 13.5px;
    margin-bottom: 18px;
}

.auth-card label { display: block; font-size: 13.5px; color: var(--muted); margin-bottom: 16px; }

.auth-card input, .auth-card select {
    display: block;
    width: 100%;
    margin-top: 7px;
    padding: 12px 16px;
    border-radius: 10px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 15px;
    outline: none;
}

.auth-card input:focus, .auth-card select:focus { border-color: var(--cyan); }

.auth-card select option { background: #0a1020; }

.auth-card .btn { margin-top: 8px; }

.auth-alt { text-align: center; color: var(--muted); font-size: 13.5px; margin-top: 20px; }

.auth-alt a { color: var(--cyan); font-weight: 700; }

.auth-tip { text-align: center; color: rgba(148, 163, 184, 0.6); font-size: 12.5px; margin-top: 10px; }

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.6s ease, transform 0.6s ease; }

.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1020px) {
    .feature-grid { grid-template-columns: 1fr; }
    .subject-grid { grid-template-columns: repeat(2, 1fr); }
    .word-grid { grid-template-columns: repeat(2, 1fr); }
    .course-grid { grid-template-columns: 1fr; }
    .list-layout { grid-template-columns: 1fr; }
    .side-panel { position: static; }
}

@media (max-width: 860px) {
    .nav-toggle { display: block; }
    .nav-menu {
        display: none;
        position: absolute;
        top: 66px;
        left: 0;
        right: 0;
        flex-direction: column;
        padding: 12px 4%;
        background: rgba(6, 9, 19, 0.97);
        border-bottom: 1px solid var(--border);
    }
    .nav-menu.open { display: flex; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .paper-card, .mock-card { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
    .subject-grid, .word-grid { grid-template-columns: 1fr; }
    .hero { padding: 70px 0 60px; }
    .section { padding: 60px 0; }
    .login-link { display: none; }
}

/* ---------- yaquan.site 对齐组件（列表页 / 详情页） ---------- */
.part-tabs { display: flex; flex-wrap: wrap; gap: 10px; margin: 0 0 20px; }

.part-tabs .ptab {
    font: inherit; font-size: 13px;
    color: var(--muted);
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 6px 18px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.part-tabs .ptab:hover { color: var(--cyan); border-color: rgba(34, 211, 238, 0.45); }

.part-tabs .ptab.active {
    color: #04121a;
    font-weight: 700;
    background: var(--grad);
    border-color: transparent;
}

.pc-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 8px; }

.part-badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    color: #67e8f9;
    background: rgba(34, 211, 238, 0.12);
    border: 1px solid rgba(34, 211, 238, 0.35);
    border-radius: 999px;
    padding: 2px 12px;
}

.fq-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    border-radius: 999px;
    padding: 2px 12px;
    border: 1px solid;
}

.fq-tag[data-fq="超高频"] { color: #fda4af; background: rgba(244, 63, 94, 0.12); border-color: rgba(244, 63, 94, 0.4); }
.fq-tag[data-fq="高频"]   { color: #fdba74; background: rgba(249, 115, 22, 0.12); border-color: rgba(249, 115, 22, 0.4); }
.fq-tag[data-fq="中频"]   { color: #fde047; background: rgba(234, 179, 8, 0.1);  border-color: rgba(234, 179, 8, 0.35); }
.fq-tag[data-fq="低频"]   { color: #94a3b8; background: rgba(148, 163, 184, 0.1); border-color: rgba(148, 163, 184, 0.3); }
.fq-tag[data-fq="保留题"] { color: #c4b5fd; background: rgba(139, 92, 246, 0.12); border-color: rgba(139, 92, 246, 0.4); }

.qt-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }

.qt-chip {
    font-size: 12px;
    color: var(--muted);
    background: var(--panel-strong);
    border: 1px dashed var(--border);
    border-radius: 8px;
    padding: 3px 10px;
}

.qt-chip b { color: #c7d2fe; margin-right: 6px; }

.confirm-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
    font-size: 12px;
    color: var(--muted);
}

.confirm-row b { color: #67e8f9; }

.confirm-avatars { display: inline-flex; }

.confirm-avatars .cav {
    width: 20px; height: 20px;
    border-radius: 50%;
    background: var(--grad);
    border: 2px solid var(--bg);
    margin-left: -6px;
}

.confirm-avatars .cav:first-child { margin-left: 0; }

.audio-card {
    padding: 22px 26px;
    border-radius: var(--radius);
    background: var(--panel);
    border: 1px solid var(--border);
    margin-bottom: 18px;
}

.audio-card audio { width: 100%; margin-top: 10px; }

.transcript {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--panel);
    margin-bottom: 18px;
    overflow: hidden;
}

.transcript > summary {
    cursor: pointer;
    padding: 16px 24px;
    font-weight: 700;
    color: #c7d2fe;
    list-style: none;
}

.transcript[open] > summary { border-bottom: 1px dashed var(--border); }

.transcript > summary::-webkit-details-marker { display: none; }

.article-body { padding: 10px 26px 20px; max-height: 420px; overflow-y: auto; }

.article-body p {
    font-size: 13px;
    line-height: 1.9;
    color: var(--muted);
    margin: 2px 0;
}

.req-bar {
    font-size: 13px;
    color: #fdba74;
    background: rgba(249, 115, 22, 0.08);
    border: 1px solid rgba(249, 115, 22, 0.3);
    border-radius: 10px;
    padding: 10px 16px;
    margin-bottom: 14px;
}

.req-bar b { color: #fdba74; }

.ans-fold { margin-top: 14px; }

.ans-fold > summary {
    cursor: pointer;
    font-size: 13px;
    font-weight: 700;
    color: var(--cyan);
    list-style: none;
    display: inline-block;
    padding: 6px 16px;
    border: 1px solid rgba(34, 211, 238, 0.35);
    border-radius: 999px;
}

.ans-fold > summary::-webkit-details-marker { display: none; }

.ans-fold .analysis { margin-top: 14px; }

.ans-line { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }

.ans-text {
    font-size: 18px;
    font-weight: 800;
    color: #4ade80;
    background: rgba(74, 222, 128, 0.1);
    border: 1px solid rgba(74, 222, 128, 0.35);
    border-radius: 8px;
    padding: 2px 14px;
}

.q-stem b { color: var(--cyan); }
.fq-tag[data-fq="新题"] { color: #86efac; background: rgba(34, 197, 94, 0.1); border-color: rgba(34, 197, 94, 0.35); }

/* =====================================================
 * 搜题 + 复制题目链接（对齐 yaquan.site/listening-select）
 * ===================================================== */
.search-bar { display: flex; gap: 10px; margin: 4px 0 14px; }

.sb-input-wrap { flex: 1; position: relative; }

.sb-input-wrap svg {
    position: absolute; left: 13px; top: 50%; transform: translateY(-50%);
    width: 16px; height: 16px; color: var(--muted); pointer-events: none;
}

.sb-input {
    width: 100%; padding: 10px 14px 10px 38px;
    border-radius: 12px; font-size: 14px; font-family: var(--font);
    background: var(--panel-strong); border: 1px solid var(--border);
    color: var(--text); outline: none;
    transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.sb-input::placeholder { color: var(--muted); }

.sb-input:focus {
    border-color: rgba(34, 211, 238, 0.5);
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.12);
}

.sb-btn { padding: 10px 26px; font-size: 14px; flex-shrink: 0; }
.sb-btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }

.sb-hint {
    font-size: 12.5px; color: var(--muted);
    background: var(--panel); border: 1px dashed var(--border);
    border-radius: 10px; padding: 7px 14px; margin: 0 0 14px;
}

.sr-head {
    display: flex; align-items: center; justify-content: space-between;
    gap: 12px; padding-bottom: 14px; margin: 6px 0 18px;
    border-bottom: 2px solid var(--border);
}

.sr-head-l { display: flex; align-items: center; gap: 12px; }

.sr-title { font-size: 20px; font-weight: 700; color: var(--text); }

.sr-count {
    padding: 3px 14px; border-radius: 999px;
    font-size: 12px; font-weight: 700; color: #04121a;
    background: linear-gradient(135deg, #22d3ee, #818cf8);
}

.sr-back {
    padding: 8px 18px; border-radius: 10px; cursor: pointer;
    font-size: 13.5px; font-weight: 700; font-family: var(--font);
    color: var(--text); background: var(--panel-strong);
    border: 1px solid var(--border); transition: all 0.25s ease;
}

.sr-back:hover { border-color: rgba(34, 211, 238, 0.45); color: var(--cyan); }

.share-btn {
    margin-left: auto; flex-shrink: 0;
    width: 30px; height: 30px; border-radius: 50%;
    display: inline-flex; align-items: center; justify-content: center;
    background: rgba(34, 211, 238, 0.08); color: var(--cyan);
    cursor: pointer; transition: all 0.2s ease;
}

.share-btn svg { width: 15px; height: 15px; }

.share-btn:hover {
    background: var(--cyan); color: #04121a;
    transform: scale(1.12); box-shadow: 0 0 16px rgba(34, 211, 238, 0.4);
}

.toast {
    position: fixed; left: 50%; bottom: 40px; z-index: 9999;
    transform: translateX(-50%) translateY(16px);
    padding: 10px 24px; border-radius: 999px;
    font-size: 14px; color: var(--text);
    background: rgba(10, 16, 32, 0.96);
    border: 1px solid rgba(34, 211, 238, 0.35);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5), 0 0 18px rgba(34, 211, 238, 0.18);
    opacity: 0; pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- 考试作答模式（对齐 yaquan.site /listening-test，浅色试卷纸风格） ---------- */
.exam-wrap { padding: 24px 0 70px; }

.exam-topbar {
    position: sticky; top: 66px; z-index: 40;
    background: rgba(10, 14, 26, 0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: 14px 0;
}

.exam-topbar-in { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; }

.exam-paper-meta { min-width: 260px; }

.exam-title { font-size: 20px; font-weight: 800; color: var(--text); margin: 0 0 8px; }

.exam-pills { display: flex; flex-wrap: wrap; gap: 8px; }

.exam-tools { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }

.exam-timer {
    display: flex; align-items: center; gap: 8px;
    color: var(--muted); font-size: 13px;
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--panel);
}

.exam-timer b { color: var(--cyan); font-size: 15px; }

.exam-audio {
    display: flex; align-items: center; gap: 12px;
    padding: 6px 12px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.audio-toggle {
    width: 34px; height: 34px; border: none; border-radius: 50%;
    background: var(--grad); color: #04121a;
    font-size: 13px; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
}

.audio-toggle .ic-pause { display: none; }
.audio-toggle.playing .ic-play { display: none; }
.audio-toggle.playing .ic-pause { display: inline; }

.audio-progress {
    position: relative; width: 180px; height: 4px;
    background: rgba(148, 163, 184, 0.25);
    border-radius: 2px; cursor: pointer;
}

.audio-fill { position: absolute; left: 0; top: 0; height: 100%; width: 0; background: var(--cyan); border-radius: 2px; transition: width 0.15s linear; }

.audio-time { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }

.audio-dot { width: 6px; height: 6px; border-radius: 50%; background: #8BA58B; animation: examPulse 1.5s ease-in-out infinite; }

@keyframes examPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(1.6); }
}

.btn-exam {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 8px 18px; border-radius: 6px;
    font: inherit; font-size: 13px; font-weight: 700;
    cursor: pointer; text-decoration: none; border: none;
}

.btn-exam-primary { background: #8BA58B; color: #fff; }
.btn-exam-primary:hover { background: #7d967e; }
.btn-exam-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-exam-ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.btn-exam-ghost:hover { color: var(--text); border-color: rgba(34, 211, 238, 0.45); }

.exam-body { margin-top: 26px; }

/* 题组 = 浅色试卷卡片 */
.qgroup {
    background: #FFFEFB;
    color: #2B2118;
    border: 1px solid #E9DFD2;
    border-radius: 12px;
    padding: 26px 28px;
    margin-bottom: 26px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

.qgroup-req { font-size: 14px; line-height: 1.8; margin-bottom: 20px; color: #2B2118; }

.qgroup-req .req-img { max-width: 100%; height: auto; margin: 12px 0; border: 1px solid #E9DFD2; border-radius: 6px; }

/* 地图/流程表格 */
.map-table-wrap { overflow-x: auto; }

.map-table { display: inline-block; min-width: max-content; border: 1px solid #000; border-radius: 4px; overflow: hidden; margin-bottom: 8px; }

.map-row { display: flex; border-bottom: 1px solid #D9CCBB; background: #fff; }
.map-row:last-child { border-bottom: none; }

.map-head { background: #F6F1EA; border-bottom: 1px solid #000; }
.map-head .c-letter { font-weight: 700; }

.c-no { width: 36px; padding: 8px 6px; border-right: 1px solid #000; font-size: 13px; text-align: center; font-weight: 700; display: flex; align-items: center; justify-content: center; }

.c-label { width: 220px; padding: 8px 12px; border-right: 1px solid #000; font-size: 13px; line-height: 1.5; white-space: nowrap; }

.c-letter { width: 50px; padding: 8px 6px; display: flex; align-items: center; justify-content: center; border-right: 1px solid #D9CCBB; font-size: 13px; }
.c-letter:last-child { border-right: none; }
.c-letter input[type="radio"] { width: 14px; height: 14px; cursor: pointer; accent-color: #5A4A3A; }

/* 行内填空 */
.fill-list { display: flex; flex-direction: column; gap: 14px; }

.fill-item { font-size: 14px; line-height: 2; color: #2B2118; }

.blank-input {
    width: 170px; padding: 2px 8px; margin: 0 4px;
    border: 1px solid #97897A; border-radius: 3px;
    font: inherit; font-size: 14px;
    background: #fff; color: #2B2118;
    outline: none; vertical-align: baseline;
}
.blank-input:focus { border-color: hsl(45, 95%, 45%); box-shadow: 0 0 0 2px rgba(212, 160, 23, 0.18); }

/* 选择题 */
.choice-q { margin-bottom: 26px; }
.choice-q:last-child { margin-bottom: 0; }

.choice-stem { font-size: 14px; line-height: 1.7; margin-bottom: 4px; color: #2B2118; }

.choice-opts { display: flex; flex-direction: column; gap: 8px; margin-top: 10px; }

.choice-opt {
    display: inline-flex; align-items: center; gap: 10px;
    font-size: 14px; cursor: pointer;
    padding: 8px 14px; border-radius: 6px;
    border: 1px solid #E9DFD2; background: #fff;
    align-self: flex-start; max-width: 100%;
    transition: border-color 0.15s ease, background 0.15s ease;
}

.choice-opt:hover { border-color: #C9B895; }

.choice-opt.selected { border: 2px solid hsl(45, 95%, 45%); background: #F6F1EA; padding: 7px 13px; }

.opt-letter {
    width: 22px; height: 22px; border-radius: 50%;
    background: #F6F1EA; border: 1px solid #E9DFD2;
    color: #5A4A3A; font-size: 12px; font-weight: 700;
    display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0;
}

.choice-opt.selected .opt-letter { background: hsl(45, 95%, 45%); border-color: hsl(45, 95%, 45%); color: #fff; }

.choice-opt input { position: absolute; opacity: 0; pointer-events: none; }

/* 判分结果 */
.exam-result { margin-top: 6px; }

.score-card {
    display: flex; align-items: center; gap: 26px; flex-wrap: wrap;
    background: #FFFEFB; border: 1px solid #E9DFD2; border-radius: 12px;
    padding: 24px 28px; color: #2B2118;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

.score-main { display: flex; align-items: baseline; gap: 4px; }
.score-main b { font-size: 46px; font-weight: 800; color: hsl(45, 95%, 45%); }
.score-main span { font-size: 20px; color: #8B7B66; }

.score-rate b { font-size: 18px; color: #2B579A; }
.score-detail { font-size: 13px; color: #5A4A3A; margin-top: 4px; }

.score-btns { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 12px; }

.result-title { font-size: 18px; font-weight: 800; color: var(--text); margin: 30px 0 14px; }

.review-list { display: grid; gap: 14px; }

.review-item {
    background: #FFFEFB; color: #2B2118;
    border: 1px solid #E9DFD2; border-left: 4px solid #94a3b8;
    border-radius: 10px; padding: 16px 20px;
}

.review-item.ok { border-left-color: #8BA58B; }
.review-item.bad { border-left-color: #e11d48; }
.review-item.blank { border-left-color: #94a3b8; }

.rv-head { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.rv-no { font-size: 15px; font-weight: 800; color: #5A4A3A; }

.rv-mark { font-size: 13px; font-weight: 700; padding: 2px 10px; border-radius: 999px; }
.rv-mark.ok { color: #3f6b40; background: rgba(139, 165, 139, 0.2); }
.rv-mark.bad { color: #e11d48; background: rgba(225, 29, 72, 0.1); }
.rv-mark.blank { color: #8B7B66; background: rgba(148, 163, 184, 0.15); }

.rv-ans p { margin: 2px 0; font-size: 14px; }
.rv-user { color: #5A4A3A; }
.rv-correct { color: #2B579A; font-weight: 700; }

.review-item .key-sentence { font-size: 13px; line-height: 1.7; background: #F6F1EA; border-radius: 8px; padding: 10px 14px; margin: 10px 0; }

.rv-expl { font-size: 13px; line-height: 1.7; margin-top: 8px; }

/* 恢复练习弹窗 */
.exam-modal {
    position: fixed; inset: 0; z-index: 90;
    background: rgba(4, 6, 14, 0.72);
    display: flex; align-items: center; justify-content: center;
}

.exam-modal-card {
    background: var(--panel-strong, #101828);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 30px 34px;
    text-align: center;
    max-width: 360px;
}

.exam-modal-card h3 { font-size: 18px; color: var(--text); margin: 0 0 8px; }
.exam-modal-card p { font-size: 14px; color: var(--muted); margin: 0 0 20px; }

.exam-modal-btns { display: flex; gap: 12px; justify-content: center; }

@media (max-width: 860px) {
    .exam-topbar { position: static; }
    .exam-topbar-in { flex-direction: column; align-items: stretch; }
    .exam-tools { justify-content: space-between; }
    .audio-progress { width: 110px; }
    .qgroup { padding: 18px 16px; }
    .c-label { width: 150px; }
}

/* ================================================================
   阅读考试模式（对齐 yaquan.site /test：双栏 + 分钟倒计时 + 答题卡）
   ================================================================ */
.rtest { position: relative; }

/* 顶栏：白底 + 棕色分隔线 + 分钟倒计时 + 交卷 */
.rtest-topbar { background: #FFFFFF; border-bottom: 1px solid #5A4A3A; position: sticky; top: 0; z-index: 120; }
.rtest-topbar-in { display: flex; justify-content: space-between; align-items: center; padding: 10px 24px; gap: 16px; }
.rtest-logo { font-size: 18px; font-weight: 800; color: #7C5C43; text-decoration: none; letter-spacing: 0.5px; }
.rtest-logo:hover { color: #5A4A3A; }
.rtest-clock { display: flex; align-items: center; gap: 8px; font-size: 14px; color: #5A4A3A; font-weight: bold; }
.rtest-clock b { font-size: 16px; }
.rtest-actions { display: flex; gap: 12px; align-items: center; }
.btn-rtest { padding: 8px 16px; border: none; border-radius: 4px; font-size: 14px; font-weight: bold; cursor: pointer; transition: all 0.2s; text-decoration: none; display: inline-block; }
.btn-rtest.primary { background: #7C5C43; color: #FFFFFF; }
.btn-rtest.primary:hover { background: #5A4A3A; }
.btn-rtest.primary:disabled { background: #B8A79A; cursor: not-allowed; }
.btn-rtest.ghost { background: transparent; color: #7C5C43; border: 1px solid #C9B895; }
.btn-rtest.ghost:hover { background: #F6F1EA; color: #5A4A3A; }

/* 双栏主体：左文章（默认 45%，可拖拽 20–80%）/ 右题目 */
.rtest-main { display: flex; height: calc(100vh - 132px); min-height: 480px; position: relative; background: #FFFFFF; }
.rtest-passage { width: 45%; overflow-y: auto; padding: 32px 40px 96px; background: #FFFFFF; }
.rtest-divider { width: 8px; flex-shrink: 0; background: #F3E7DA; cursor: col-resize; position: relative; transition: background 0.2s; }
.rtest-divider:hover { background: #E3D0BC; }
.rdivider-grip { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 2px; height: 36px; border-radius: 2px; background: #97897A; }
.rtest-questions { flex: 1; overflow-y: auto; padding: 32px 40px 120px; background: #FFFFFF; }

.rtest-part-head { margin-bottom: 20px; }
.rtest-part { font-size: 18px; font-weight: bold; color: #000; margin-bottom: 6px; }
.rtest-part-sub { font-size: 15px; color: #000; line-height: 1.5; }
.rtest-title { font-size: 16px; font-weight: bold; color: #2B2118; margin-bottom: 24px; line-height: 1.4; }
.rpara { margin-bottom: 16px; }
.rpara-key { display: block; font-size: 13px; font-weight: 600; color: #5A4A3A; min-width: 20px; margin-bottom: 4px; }
.rpara-text { font-size: 14px; line-height: 1.6; text-align: justify; color: #2B2118; }

/* 题目分组（复用 qgroup-req/choice/map-table 样式，此处只做布局差异） */
.rgroup { margin-bottom: 32px; }
.rgroup .qgroup-req { margin-bottom: 16px; }
.rgroup .map-table-wrap { margin-bottom: 0; }

/* 当前题指示：chevron + 浅蓝底（对齐原站 #8BA5B0 / #EAF0F2） */
.chev { display: none; width: 24px; height: 32px; background: #8BA5B0; border: 1px solid #8BA5B0; border-radius: 4px; align-items: center; justify-content: center; flex-shrink: 0; margin: -2px 8px 2px 0; vertical-align: middle; }
.choice-q.current .chev, .fill-item.current .chev { display: inline-flex; }
.choice-q.current, .fill-item.current { background: #EAF0F2; border-radius: 6px; padding: 6px 8px; margin: 0 -8px; }
.map-row.current { background: #EAF0F2; }
.rgroup .choice-q { margin-bottom: 18px; }

/* 底部答题卡 pills（fixed 左下，对齐原站） */
.rtest-pills { position: fixed; bottom: 16px; left: 32px; display: flex; gap: 6px; align-items: center; z-index: 1000; flex-wrap: wrap; max-width: 70%; }
.rpill { width: 32px; height: 32px; min-width: 32px; display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: normal; color: #5A4A3A; background: transparent; border: none; border-radius: 4px; cursor: pointer; transition: all 0.2s; }
.rpill:hover { background: #F6F1EA; }
.rpill.done { background: #97897A; color: #FFFFFF; border: 2px solid #97897A; }
.rpill.current { border: 2px solid #8BA5B0; }
.rpill.done.current { border-color: #8BA5B0; }

/* 右下角 上一题/下一题（48px，米色/黑色，对齐原站） */
.rtest-nav { position: fixed; bottom: 32px; right: 32px; display: flex; gap: 12px; z-index: 1000; }
.rnav-btn { width: 48px; height: 48px; border: none; border-radius: 4px; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: background-color 0.2s; }
.rnav-prev { background: #F3E7DA; }
.rnav-prev:hover { background: #D9CCBB; }
.rnav-next { background: #000000; }
.rnav-next:hover { background: #5A4A3A; }

/* 回顾卡：段落定位徽标 */
.rv-para { margin-left: auto; font-size: 12px; color: #8BA5B0; font-weight: 600; background: #F6F1EA; border: 1px solid #E9DFD2; border-radius: 4px; padding: 2px 8px; }

/* 自定义滚动条（对齐原站） */
.custom-scrollbar::-webkit-scrollbar { width: 16px; }
.custom-scrollbar::-webkit-scrollbar-track { background: #fff; }
.custom-scrollbar::-webkit-scrollbar-thumb { background: #97897A; border-radius: 0; }
.custom-scrollbar::-webkit-scrollbar-thumb:hover { background: #97897A; }

@media (max-width: 900px) {
    .rtest-main { flex-direction: column; height: auto; }
    .rtest-passage { width: 100% !important; max-height: 44vh; border-bottom: 1px solid #E9DFD2; padding: 20px 18px 32px; }
    .rtest-divider { display: none; }
    .rtest-questions { padding: 20px 18px 140px; }
    .rtest-pills { max-width: calc(100vw - 96px); left: 16px; bottom: 12px; }
    .rtest-nav { right: 16px; bottom: 20px; }
    .rnav-btn { width: 42px; height: 42px; }
}

/* 选择题选中态：现代浏览器 :has() 即时反馈（与 .selected 同款），兜底 JS 未执行场景 */
.choice-opt:has(input:checked) { border: 2px solid hsl(45, 95%, 45%); background: #F6F1EA; padding: 7px 13px; }
.choice-opt:has(input:checked) .opt-letter { background: hsl(45, 95%, 45%); border-color: hsl(45, 95%, 45%); color: #fff; }