/* ============================
   TOP帮考研信息门户 - 全局样式
   ============================ */

:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #818cf8;
    --accent: #f59e0b;
    --accent-2: #ec4899;
    --bg: #f8fafc;
    --bg-2: #ffffff;
    --bg-soft: #f1f5f9;
    --text: #0f172a;
    --text-2: #475569;
    --text-3: #94a3b8;
    --border: #e2e8f0;
    --success: #10b981;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
    --shadow: 0 4px 12px rgba(15, 23, 42, .08);
    --shadow-lg: 0 20px 40px -10px rgba(79, 70, 229, .18);
    --radius: 14px;
    --radius-sm: 10px;
    --radius-lg: 22px;
    --transition: .25s cubic-bezier(.4, 0, .2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }

/* ============================
   顶部导航 Header
   ============================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: saturate(180%) blur(18px);
    -webkit-backdrop-filter: saturate(180%) blur(18px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    transition: box-shadow var(--transition);
}

.site-header.scrolled {
    box-shadow: 0 4px 20px rgba(15, 23, 42, .06);
}

.header-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 16px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.brand {
    display: flex;
    align-items: center;
    background: #fff;
    border-radius: 8px;
    padding: 4px 8px;
}

.brand-img {
    height: 48px;
    width: auto;
    display: block;
}

.brand-logo {
    width: 38px;
    height: 38px;
    border-radius: 11px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-2) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 800;
    font-size: 16px;
    -webkit-text-fill-color: #fff;
}

.nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav a {
    padding: 9px 18px;
    border-radius: 10px;
    color: var(--text-2);
    font-size: 15px;
    font-weight: 500;
    transition: all var(--transition);
    position: relative;
}

.nav a:hover {
    color: var(--primary);
    background: rgba(79, 70, 229, 0.07);
}

.nav a.active {
    color: var(--primary);
    background: rgba(79, 70, 229, 0.1);
    font-weight: 600;
}

.nav a.active::after {
    content: "";
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: -3px;
    width: 20px;
    height: 3px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent-2));
}

.header-cta {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
    box-shadow: 0 6px 18px -6px rgba(79, 70, 229, 0.6);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 24px -6px rgba(79, 70, 229, 0.7);
}

.btn-ghost {
    background: transparent;
    color: var(--text-2);
    border: 1px solid var(--border);
}

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

.btn-ai {
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
    color: #fff;
    box-shadow: 0 6px 18px -6px rgba(6, 182, 212, 0.6);
}

.btn-ai:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 24px -6px rgba(6, 182, 212, 0.7);
}

/* 移动端菜单 */
.menu-toggle { display: none; }

/* ============================
   Hero 区域
   ============================ */
.hero {
    position: relative;
    padding: 80px 28px 100px;
    overflow: hidden;
    background:
        radial-gradient(1200px 600px at 90% -10%, rgba(236, 72, 153, .18), transparent 60%),
        radial-gradient(900px 500px at -10% 30%, rgba(79, 70, 229, .18), transparent 60%),
        linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.hero-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    align-items: center;
    gap: 60px;
}

.hero-text .badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 999px;
    background: rgba(79, 70, 229, 0.08);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 22px;
}

.hero-text .badge::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.25);
}

.hero-text h1 {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1px;
    margin-bottom: 22px;
    background: linear-gradient(135deg, #0f172a 0%, #4f46e5 60%, #ec4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    font-size: 18px;
    color: var(--text-2);
    max-width: 540px;
    margin-bottom: 36px;
}

.hero-actions {
    display: flex;
    gap: 14px;
    margin-bottom: 44px;
}

.hero-stats {
    display: flex;
    gap: 36px;
}

.hero-stats .stat strong {
    display: block;
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-stats .stat span {
    font-size: 13px;
    color: var(--text-3);
}

/* Hero 装饰卡片 */
.hero-visual {
    position: relative;
    height: 460px;
}

.float-card {
    position: absolute;
    background: #fff;
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(226, 232, 240, 0.6);
    transition: transform .4s ease;
}

.float-card:hover { transform: translateY(-6px) rotate(0deg) !important; }

.float-card.c1 {
    top: 30px;
    left: 20px;
    width: 230px;
    transform: rotate(-6deg);
}

.float-card.c2 {
    top: 120px;
    right: 10px;
    width: 260px;
    transform: rotate(4deg);
    z-index: 2;
}

.float-card.c3 {
    bottom: 30px;
    left: 60px;
    width: 250px;
    transform: rotate(-3deg);
}

.float-card .row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.float-card .icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 16px;
}

.icon.i-1 { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.icon.i-2 { background: linear-gradient(135deg, #4f46e5, #06b6d4); }
.icon.i-3 { background: linear-gradient(135deg, #ec4899, #8b5cf6); }

.float-card .title {
    font-weight: 700;
    font-size: 15px;
}

.float-card .meta {
    font-size: 12px;
    color: var(--text-3);
}

.float-card .progress {
    height: 6px;
    background: var(--bg-soft);
    border-radius: 3px;
    overflow: hidden;
}

.float-card .progress > div {
    height: 100%;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent-2));
}

.float-card .bar-row {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-2);
    margin-top: 6px;
}

/* ============================
   主容器 / 通用
   ============================ */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 28px;
}

.section {
    padding: 80px 0;
}

.section-head {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 56px;
}

.section-head .eyebrow {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 999px;
    background: rgba(245, 158, 11, 0.12);
    color: var(--accent);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 14px;
}

.section-head h2 {
    font-size: 36px;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 14px;
    color: var(--text);
}

.section-head p {
    color: var(--text-2);
    font-size: 16px;
}

/* ============================
   功能特性 (Home)
   ============================ */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent-2));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .4s ease;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.feature-card:hover::before { transform: scaleX(1); }

.feature-card .ico {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 18px;
    color: #fff;
}

.feature-card:nth-child(1) .ico { background: linear-gradient(135deg, #4f46e5, #06b6d4); }
.feature-card:nth-child(2) .ico { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.feature-card:nth-child(3) .ico { background: linear-gradient(135deg, #ec4899, #8b5cf6); }
.feature-card:nth-child(4) .ico { background: linear-gradient(135deg, #10b981, #06b6d4); }

.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.feature-card p {
    color: var(--text-2);
    font-size: 14px;
    line-height: 1.7;
}

/* ============================
   院校信息 (Home)
   ============================ */
.colleges-section {
    background: linear-gradient(180deg, #fff 0%, #f8fafc 100%);
}

.colleges-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 28px;
}

.search-box {
    position: relative;
    flex: 1;
    max-width: 360px;
}

.search-box input {
    width: 100%;
    padding: 12px 18px 12px 44px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #fff;
    font-size: 14px;
    color: var(--text);
    transition: all var(--transition);
    outline: none;
    font-family: inherit;
}

.search-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

.search-box::before {
    content: "🔍";
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 15px;
    opacity: 0.6;
}

.province-tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 24px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--border);
}

.province-tab {
    padding: 8px 16px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--border);
    font-size: 13px;
    color: var(--text-2);
    cursor: pointer;
    transition: all var(--transition);
    font-weight: 500;
}

.province-tab:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.province-tab.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.province-info {
    display: flex;
    align-items: baseline;
    gap: 14px;
    margin-bottom: 20px;
}

.province-info h3 {
    font-size: 24px;
    font-weight: 800;
    color: var(--text);
}

.province-info .count {
    color: var(--text-3);
    font-size: 14px;
}

.college-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
}

.college-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
    transition: all var(--transition);
    position: relative;
    cursor: pointer;
    overflow: hidden;
}

.college-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.college-card::after {
    content: "→";
    position: absolute;
    right: 18px;
    top: 50%;
    transform: translateY(-50%) translateX(8px);
    opacity: 0;
    color: var(--primary);
    font-weight: 700;
    transition: all var(--transition);
}

.college-card:hover::after {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
}

.college-card .card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 6px;
}

.college-card .name {
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.college-card .school-logo {
    width: 36px;
    height: 36px;
    border-radius: 6px;
    object-fit: contain;
    flex-shrink: 0;
    background: #f8fafc;
    padding: 2px;
}

.college-card .type {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 6px;
    background: var(--bg-soft);
    color: var(--text-2);
    font-size: 12px;
    font-weight: 500;
}

.college-card .type.tag-985 { background: rgba(239, 68, 68, 0.1); color: #dc2626; }
.college-card .type.tag-211 { background: rgba(245, 158, 11, 0.1); color: #d97706; }
.college-card .type.tag-双一流 { background: rgba(79, 70, 229, 0.1); color: var(--primary); }

.college-card .card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.college-card .chsi-link {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 4px 10px;
    border-radius: 6px;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.08), rgba(236, 72, 153, 0.08));
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    transition: all var(--transition);
    text-decoration: none;
}

.college-card .chsi-link:hover {
    background: linear-gradient(135deg, var(--primary), var(--accent-2));
    color: #fff;
    transform: translateY(-1px);
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-3);
    grid-column: 1 / -1;
}

.empty-state .emoji { font-size: 48px; margin-bottom: 12px; }

/* ============================
   备考指南页面
   ============================ */
.page-hero {
    padding: 70px 28px 50px;
    background:
        radial-gradient(800px 400px at 80% 0%, rgba(236, 72, 153, 0.12), transparent 60%),
        radial-gradient(600px 300px at 0% 100%, rgba(79, 70, 229, 0.12), transparent 60%),
        linear-gradient(180deg, #ffffff, #f8fafc);
    text-align: center;
}

.page-hero h1 {
    font-size: 42px;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 14px;
    background: linear-gradient(135deg, var(--text) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-hero p {
    color: var(--text-2);
    font-size: 17px;
    max-width: 600px;
    margin: 0 auto;
}

.timeline-scroll {
    position: relative;
    margin-top: 30px;
    height: 900px;
    overflow-y: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: #fff;
    box-shadow: var(--shadow-sm);
    scrollbar-width: thin;
    scrollbar-color: var(--primary) transparent;
}

.timeline-scroll::-webkit-scrollbar {
    width: 6px;
}

.timeline-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.timeline-scroll::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 3px;
}

.timeline-scroll::-webkit-scrollbar-thumb:hover {
    background: var(--accent-2);
}

.timeline-image {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
}

.timeline-iframe {
    border: none;
}

.zhihu-post {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    color: #1a1a1a;
    line-height: 1.8;
    padding: 24px;
    max-width: 768px;
    margin: 0 auto;
}

.zhihu-post .post-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid #f0f0f0;
}

.zhihu-post .author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.zhihu-post .avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, #4f46e5, #ec4899);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}

.zhihu-post .name {
    font-weight: 600;
    font-size: 16px;
    color: #1a1a1a;
}

.zhihu-post .bio {
    font-size: 13px;
    color: #999;
    margin-top: 2px;
}

.zhihu-post .meta {
    font-size: 13px;
    color: #999;
}

.zhihu-post .post-title {
    font-size: 24px;
    font-weight: 700;
    line-height: 1.4;
    color: #1a1a1a;
    margin-bottom: 16px;
}

.zhihu-post .post-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.zhihu-post .post-tags span {
    padding: 6px 14px;
    background: #f6f6f6;
    color: #4f46e5;
    border-radius: 16px;
    font-size: 13px;
}

.zhihu-post .stage-card {
    background: #fff;
    border: 1px solid #f0f0f0;
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.zhihu-post .stage-card::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, #4f46e5, #ec4899);
}

.zhihu-post .stage-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.zhihu-post .stage-number {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, #4f46e5, #ec4899);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}

.zhihu-post .stage-period {
    font-size: 14px;
    font-weight: 600;
    color: #4f46e5;
}

.zhihu-post .stage-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
    color: #1a1a1a;
}

.zhihu-post .stage-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.zhihu-post .subject-section {
    margin-bottom: 16px;
}

.zhihu-post .subject-section:last-child {
    margin-bottom: 0;
}

.zhihu-post .subject-section h4 {
    font-size: 15px;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
}

.zhihu-post .subject-section ul {
    margin: 0;
    padding-left: 24px;
}

.zhihu-post .subject-section li {
    font-size: 14px;
    color: #666;
    margin-bottom: 6px;
    line-height: 1.7;
}

.zhihu-post .subject-section li:last-child {
    margin-bottom: 0;
}

.zhihu-post .tips-card {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05), rgba(236, 72, 153, 0.05));
    border: 1px solid rgba(79, 70, 229, 0.1);
    border-radius: 12px;
    padding: 24px;
    margin-top: 24px;
}

.zhihu-post .tips-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: #1a1a1a;
}

.zhihu-post .tips-card ul {
    margin: 0;
    padding-left: 24px;
}

.zhihu-post .tips-card li {
    font-size: 14px;
    color: #666;
    margin-bottom: 8px;
}

.zhihu-post .tips-card li strong {
    color: #4f46e5;
}

.zhihu-post .ending {
    text-align: center;
    padding: 32px 0;
    margin-top: 24px;
}

.zhihu-post .ending p {
    font-size: 16px;
    color: #4f46e5;
    font-weight: 500;
}

.zhihu-post .end-icons {
    font-size: 32px;
    margin-top: 12px;
}

.zhihu-post .post-footer {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid #f0f0f0;
}

.zhihu-post .actions {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
}

.zhihu-post .action-btn {
    padding: 10px 20px;
    border: 1px solid #d9d9d9;
    border-radius: 8px;
    background: #fff;
    font-size: 14px;
    color: #666;
    cursor: pointer;
    transition: all 0.2s;
}

.zhihu-post .action-btn:hover {
    background: #f6f6f6;
    border-color: #4f46e5;
    color: #4f46e5;
}

.zhihu-post .stats {
    font-size: 13px;
    color: #999;
}

.timeline {
    position: relative;
    margin-top: 30px;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 24px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--primary), var(--accent-2));
}

.tl-item {
    position: relative;
    padding-left: 70px;
    margin-bottom: 32px;
}

.tl-item .dot {
    position: absolute;
    left: 12px;
    top: 6px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent-2));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
    box-shadow: 0 0 0 4px #fff, 0 4px 12px rgba(79, 70, 229, 0.3);
}

.tl-item .card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 26px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}

.tl-item .card:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow);
}

.tl-item h3 {
    font-size: 20px;
    margin-bottom: 6px;
    color: var(--text);
}

.tl-item .period {
    display: inline-block;
    font-size: 12px;
    color: var(--primary);
    font-weight: 600;
    background: rgba(79, 70, 229, 0.08);
    padding: 3px 10px;
    border-radius: 6px;
    margin-bottom: 12px;
}

.tl-item ul li {
    padding: 4px 0 4px 20px;
    position: relative;
    color: var(--text-2);
    font-size: 14px;
}

.tl-item ul li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: 700;
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
    margin-top: 50px;
}

.experience-showcase {
    display: flex;
    gap: 20px;
    margin-top: 30px;
}

.exp-card {
    flex: 1;
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    transition: all var(--transition);
    position: relative;
    border: 1px solid var(--border);
}

.exp-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.exp-card .exp-visual {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.exp-card .exp-visual img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #f8f9fa;
    transition: transform 0.4s ease;
}

.exp-card:hover .exp-visual img {
    transform: scale(1.08);
}

.exp-card .exp-icon {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.12);
}

.exp-card .exp-info {
    padding: 16px 18px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.exp-card .exp-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.exp-card .exp-tags {
    display: flex;
    gap: 6px;
}

.exp-card .exp-tag {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    background: rgba(79, 70, 229, 0.08);
    color: var(--primary);
}

.exp-card .exp-tag-cross {
    background: rgba(239, 68, 68, 0.08);
    color: #ef4444;
}

.exp-card .exp-tag-gold {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
}

.exp-card .exp-tag-highlight {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: #fff;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.exp-card .exp-score {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-2);
}

.exp-card .exp-info h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 5px;
    line-height: 1.4;
}

.exp-card .exp-info p {
    font-size: 13px;
    color: var(--text-2);
    line-height: 1.5;
}

.exp-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
}

.guide-subject {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: all var(--transition);
}

.guide-subject:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.guide-subject h4 {
    font-size: 18px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.guide-subject .pill {
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 6px;
    background: var(--primary);
    color: #fff;
    font-weight: 600;
}

.guide-subject ul li {
    padding: 6px 0;
    color: var(--text-2);
    font-size: 14px;
    border-bottom: 1px dashed var(--border);
}

.guide-subject ul li:last-child { border-bottom: none; }

.more-btn {
    display: block;
    margin-top: 16px;
    margin-left: auto;
    padding: 8px 14px;
    background: transparent;
    border: none;
    color: var(--primary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.more-btn:hover {
    color: var(--accent-2);
    transform: translateX(4px);
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

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

.modal-content {
    background: #fff;
    border-radius: var(--radius);
    padding: 32px;
    max-width: 400px;
    width: 90%;
    text-align: center;
    transform: scale(0.9);
    transition: transform 0.3s;
}

.modal-overlay.show .modal-content {
    transform: scale(1);
}

.modal-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.modal-text {
    font-size: 14px;
    color: var(--text-2);
    margin-bottom: 24px;
}

.modal-btn {
    padding: 10px 28px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

.modal-btn:hover {
    background: var(--accent-2);
}

.login-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s;
}

.login-modal.show {
    pointer-events: auto;
    opacity: 1;
}

.login-modal .modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
}

.login-modal .modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: #fff;
    border-radius: 16px;
    padding: 32px;
    width: 320px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s;
}

.login-modal.show .modal-content {
    transform: translate(-50%, -50%) scale(1);
}

.login-modal .modal-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    border: none;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 50%;
    font-size: 20px;
    color: var(--text-3);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.login-modal .modal-close:hover {
    background: rgba(0, 0, 0, 0.1);
    color: var(--text);
}

.login-modal .qr-code-box {
    width: 100%;
    aspect-ratio: 1;
    background: #f8fafc;
    border-radius: 12px;
    border: 2px dashed var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-modal .qr-code-placeholder {
    text-align: center;
}

.login-modal .qr-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.login-modal .qr-code-placeholder p {
    font-size: 14px;
    color: var(--text-2);
    margin: 0;
}

/* ============================
   在线刷题页面
   ============================ */
.practice-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 28px;
    margin-top: 20px;
}

.practice-side {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    height: fit-content;
    position: sticky;
    top: 90px;
}

.practice-side h4 {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-3);
    margin-bottom: 14px;
}

.practice-side .cat-list li {
    padding: 10px 14px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-2);
    transition: all var(--transition);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.practice-side .cat-list li:hover {
    background: var(--bg-soft);
    color: var(--primary);
}

.practice-side .cat-list li.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
}

.practice-side .cat-list li .num {
    font-size: 12px;
    opacity: 0.7;
}

.practice-main {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 36px;
}

.question-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 22px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--border);
}

.question-bar .progress-pill {
    background: var(--bg-soft);
    border-radius: 999px;
    padding: 6px 14px;
    font-size: 13px;
    color: var(--text-2);
    font-weight: 600;
}

.question-bar .progress-pill strong {
    color: var(--primary);
    font-size: 15px;
}

.question-title {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.6;
    margin-bottom: 24px;
    color: var(--text);
}

.question-title .qtype {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 6px;
    background: rgba(245, 158, 11, 0.12);
    color: var(--accent);
    font-size: 12px;
    font-weight: 600;
    margin-right: 8px;
    vertical-align: middle;
}

.options {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 26px;
}

.option {
    padding: 14px 18px;
    border: 1.5px solid var(--border);
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 15px;
    color: var(--text);
}

.option:hover {
    border-color: var(--primary-light);
    background: rgba(79, 70, 229, 0.04);
}

.option.selected {
    border-color: var(--primary);
    background: rgba(79, 70, 229, 0.08);
    color: var(--primary);
    font-weight: 600;
}

.option .letter {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--bg-soft);
    color: var(--text-2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
    flex-shrink: 0;
}

.option.selected .letter {
    background: var(--primary);
    color: #fff;
}

.option.correct {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.06);
    color: var(--success);
}

.option.correct .letter { background: var(--success); color: #fff; }

.option.wrong {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.05);
    color: #ef4444;
}

.option.wrong .letter { background: #ef4444; color: #fff; }

.feedback {
    padding: 16px 18px;
    border-radius: 12px;
    margin-bottom: 22px;
    font-size: 14px;
    line-height: 1.7;
    display: none;
}

.feedback.show { display: block; }

.feedback.right {
    background: rgba(16, 185, 129, 0.08);
    border-left: 4px solid var(--success);
    color: #065f46;
}

.feedback.wrong {
    background: rgba(239, 68, 68, 0.06);
    border-left: 4px solid #ef4444;
    color: #991b1b;
}

.feedback strong { display: block; margin-bottom: 6px; }

.q-actions {
    display: flex;
    justify-content: space-between;
    gap: 12px;
}

.q-actions .btn { min-width: 120px; }

/* ============================
   统计与打卡模块
   ============================ */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 30px;
}

.stat-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent-2));
}

.stat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.stat-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
}

.stat-badge {
    padding: 4px 12px;
    border-radius: 12px;
    background: var(--bg-soft);
    color: var(--text-2);
    font-size: 12px;
    font-weight: 500;
}

.stat-badge.primary {
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary);
}

.accuracy-circle {
    position: relative;
    width: 180px;
    height: 180px;
    margin: 0 auto 24px;
}

.accuracy-ring {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.accuracy-inner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.accuracy-num {
    font-size: 48px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.accuracy-unit {
    font-size: 20px;
    color: var(--text-2);
    margin-left: 2px;
}

.stat-details {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.stat-details > div {
    text-align: center;
    padding: 12px 8px;
    background: var(--bg);
    border-radius: 10px;
}

.stat-label {
    display: block;
    font-size: 12px;
    color: var(--text-3);
    margin-bottom: 4px;
}

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

.stat-value.correct { color: var(--success); }
.stat-value.wrong { color: #ef4444; }

.stat-trend {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.trend-bar {
    flex: 1;
    height: 6px;
    background: var(--bg-soft);
    border-radius: 3px;
    overflow: hidden;
}

.trend-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent-2));
    border-radius: 3px;
    transition: width 0.5s ease;
}

.trend-text {
    font-size: 13px;
    color: var(--success);
    font-weight: 500;
}

.calendar-grid {
    margin-bottom: 16px;
}

.calendar-header {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    font-size: 12px;
    color: var(--text-3);
    margin-bottom: 8px;
    font-weight: 500;
}

.calendar-body {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.calendar-day:hover {
    background: var(--bg-soft);
}

.calendar-day.active {
    background: linear-gradient(135deg, var(--primary), var(--accent-2));
    color: #fff;
}

.calendar-day.today {
    border: 2px solid var(--primary);
}

.calendar-day.today.active {
    border: 2px solid #fff;
}

.calendar-day.other-month {
    color: var(--text-3);
    opacity: 0.4;
}

.calendar-day.has-dot::after {
    content: "";
    position: absolute;
    bottom: 4px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--success);
}

.calendar-legend {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
    font-size: 12px;
    color: var(--text-2);
}

.calendar-legend .dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border);
    margin-right: 6px;
}

.calendar-legend .dot.active {
    background: linear-gradient(135deg, var(--primary), var(--accent-2));
}

.calendar-legend .dot.today {
    border: 2px solid var(--primary);
    background: transparent;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ============================
   AI 答疑页面
   ============================ */
.qa-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 24px;
    height: calc(100vh - 200px);
    min-height: 600px;
    margin-top: 20px;
}

.qa-side {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px 20px;
}

.qa-side h4 {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-3);
    margin-bottom: 14px;
}

.qa-suggest {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.qa-suggest button {
    text-align: left;
    padding: 12px 14px;
    border-radius: 10px;
    background: var(--bg-soft);
    color: var(--text-2);
    font-size: 13px;
    line-height: 1.5;
    transition: all var(--transition);
}

.qa-suggest button:hover {
    background: rgba(79, 70, 229, 0.08);
    color: var(--primary);
    transform: translateX(4px);
}

.chat {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-head {
    padding: 16px 22px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.04), rgba(236, 72, 153, 0.04));
}

.chat-head .avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent-2));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.chat-head .info h5 { font-size: 15px; margin-bottom: 2px; }
.chat-head .info span { font-size: 12px; color: var(--text-3); }
.chat-head .status {
    margin-left: auto;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
}

.chat-body {
    flex: 1;
    overflow-y: auto;
    padding: 24px 22px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.bubble {
    max-width: 78%;
    padding: 14px 18px;
    border-radius: 16px;
    line-height: 1.7;
    font-size: 14.5px;
    animation: bubbleIn 0.3s ease;
    word-break: break-word;
}

@keyframes bubbleIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.bubble.bot {
    background: var(--bg-soft);
    color: var(--text);
    border-bottom-left-radius: 4px;
    align-self: flex-start;
}

.bubble.user {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-bottom-right-radius: 4px;
    align-self: flex-end;
}

.bubble .name {
    font-size: 11px;
    font-weight: 600;
    opacity: 0.65;
    margin-bottom: 4px;
}

.bubble.typing {
    display: inline-flex;
    gap: 4px;
    padding: 16px 18px;
}

.bubble.typing span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-3);
    animation: bounce 1.2s infinite;
}

.bubble.typing span:nth-child(2) { animation-delay: 0.15s; }
.bubble.typing span:nth-child(3) { animation-delay: 0.3s; }

@keyframes bounce {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
    30% { transform: translateY(-6px); opacity: 1; }
}

.chat-input {
    padding: 16px 22px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 10px;
    align-items: flex-end;
    background: #fafbff;
}

.chat-input textarea {
    flex: 1;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 10px 14px;
    font-family: inherit;
    font-size: 14px;
    color: var(--text);
    background: #fff;
    resize: none;
    outline: none;
    min-height: 44px;
    max-height: 120px;
    transition: all var(--transition);
}

.chat-input textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.08);
}

.chat-input .send {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all var(--transition);
    flex-shrink: 0;
}

.chat-input .send:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 16px rgba(79, 70, 229, 0.4);
}

.chat-input .upload-btn {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--bg-soft);
    border: 1px dashed var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 300;
    color: var(--primary);
    cursor: pointer;
    transition: all var(--transition);
    flex-shrink: 0;
}

.chat-input .upload-btn:hover {
    background: rgba(79, 70, 229, 0.06);
    border-color: var(--primary);
    transform: scale(1.05);
}

.chat-input .upload-btn input[type="file"] {
    display: none;
}

/* ============================
   Footer
   ============================ */
.footer {
    background: #0f172a;
    color: #cbd5e1;
    padding: 50px 28px 24px;
    margin-top: 80px;
}

.footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 32px;
}

.footer h5 {
    color: #fff;
    font-size: 14px;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer p, .footer a {
    font-size: 14px;
    color: #94a3b8;
    line-height: 1.8;
    transition: color var(--transition);
}

.footer a:hover { color: var(--primary-light); }

.footer ul li { padding: 4px 0; }

.footer-bottom {
    max-width: 1280px;
    margin: 0 auto;
    border-top: 1px solid #1e293b;
    padding-top: 20px;
    text-align: center;
    font-size: 13px;
    color: #64748b;
}

/* ============================
   响应式
   ============================ */
@media (max-width: 1024px) {
    .hero-inner { grid-template-columns: 1fr; }
    .hero-visual { height: 380px; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .guide-grid { grid-template-columns: 1fr 1fr; }
    .experience-grid { grid-template-columns: repeat(2, 1fr); }
    .practice-layout, .qa-layout { grid-template-columns: 1fr; }
    .practice-side, .qa-side { position: static; }
    .footer-inner { grid-template-columns: 1fr 1fr; }
    .hero-text h1 { font-size: 42px; }
    .section-head h2 { font-size: 30px; }
}

@media (max-width: 720px) {
    .header-inner { padding: 14px 18px; gap: 14px; }
    .nav { display: none; position: absolute; top: 100%; left: 0; right: 0;
        flex-direction: column; padding: 16px; background: #fff;
        border-bottom: 1px solid var(--border); gap: 4px; }
    .nav.open { display: flex; }
    .menu-toggle {
        display: flex; width: 38px; height: 38px; border-radius: 10px;
        align-items: center; justify-content: center;
        background: var(--bg-soft); font-size: 18px;
    }
    .header-cta .btn-ghost { display: none; }
    .hero { padding: 50px 18px 70px; }
    .hero-text h1 { font-size: 32px; }
    .hero-stats { gap: 20px; }
    .features-grid, .guide-grid { grid-template-columns: 1fr; }
    .container { padding: 0 18px; }
    .section { padding: 50px 0; }
    .footer-inner { grid-template-columns: 1fr; gap: 24px; }
    .colleges-toolbar { flex-direction: column; align-items: stretch; }
    .search-box { max-width: 100%; }
}