/* ============================================================
   蜗牛壳AI课堂 - 前台设计系统 (woniubox)
   Design: 科技 / 教育 / 专业 / 双主题(浅色默认 + 深色)
   品牌色: indigo(#4f46e5) + violet(#7c3aed) + cyan(#06b6d4) + emerald(#10b981)
   ============================================================ */

/* ============ CSS Variables - Light (默认) ============ */
:root,
[data-theme="light"] {
    --primary: #4f46e5;
    --primary-2: #7c3aed;
    --primary-light: #6366f1;
    --primary-dark: #3730a3;
    --primary-bg: #eef2ff;
    --accent: #06b6d4;
    --accent-2: #10b981;

    --bg: #ffffff;
    --bg-alt: #f7f8fc;
    --bg-card: #ffffff;
    --bg-hover: #f1f5f9;
    --bg-elevated: #ffffff;
    --bg-soft: #f8fafc;

    --text: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;

    --border: #e7e9f2;
    --border-light: #f1f3f9;

    --success: #16a34a; --success-bg: #f0fdf4;
    --danger: #ef4444;  --danger-bg: #fef2f2;
    --warning: #f59e0b; --warning-bg: #fffbeb;
    --info: #3b82f6;    --info-bg: #eff6ff;

    --radius-sm: 10px;
    --radius: 14px;
    --radius-lg: 22px;
    --radius-xl: 28px;

    --shadow-sm: 0 1px 3px rgba(15,23,42,.06), 0 1px 2px rgba(15,23,42,.04);
    --shadow: 0 6px 24px rgba(15,23,42,.07);
    --shadow-lg: 0 18px 50px rgba(15,23,42,.10);
    --shadow-glow: 0 10px 30px rgba(79,70,229,.25);

    --header-h: 68px;
    --container-w: 1180px;
    --transition: .25s cubic-bezier(.4,0,.2,1);

    --gradient-brand: linear-gradient(135deg, #4f46e5 0%, #7c3aed 55%, #06b6d4 110%);
    --gradient-brand-soft: linear-gradient(135deg, #eef2ff 0%, #f5f3ff 50%, #ecfeff 100%);
    --gradient-hero: radial-gradient(1200px 500px at 80% -10%, #ede9fe 0%, transparent 60%),
                      radial-gradient(900px 500px at 0% 10%, #cffafe 0%, transparent 55%),
                      linear-gradient(180deg, #ffffff 0%, #f7f8fc 100%);
}

/* ============ Dark Theme ============ */
[data-theme="dark"] {
    --primary: #818cf8;
    --primary-2: #a78bfa;
    --primary-light: #a5b4fc;
    --primary-dark: #6366f1;
    --primary-bg: #1e1b4b;
    --accent: #22d3ee;
    --accent-2: #34d399;

    --bg: #0b1020;
    --bg-alt: #0f152b;
    --bg-card: #141b33;
    --bg-hover: #1c2440;
    --bg-elevated: #18213d;
    --bg-soft: #111937;

    --text: #e8ecf6;
    --text-secondary: #aab4cf;
    --text-muted: #6b7693;
    --text-inverse: #0b1020;

    --border: #243154;
    --border-light: #1b2440;

    --success: #34d399; --success-bg: #06281c;
    --danger: #f87171;  --danger-bg: #2c1414;
    --warning: #fbbf24; --warning-bg: #2a2110;
    --info: #60a5fa;    --info-bg: #10243f;

    --shadow-sm: 0 1px 3px rgba(0,0,0,.4);
    --shadow: 0 6px 24px rgba(0,0,0,.45);
    --shadow-lg: 0 18px 50px rgba(0,0,0,.55);
    --shadow-glow: 0 10px 30px rgba(129,140,248,.35);

    --gradient-brand: linear-gradient(135deg, #6366f1 0%, #a78bfa 55%, #22d3ee 110%);
    --gradient-brand-soft: linear-gradient(135deg, #1e1b4b 0%, #2e1065 50%, #083344 100%);
    --gradient-hero: radial-gradient(1200px 500px at 80% -10%, #312e81 0%, transparent 60%),
                      radial-gradient(900px 500px at 0% 10%, #164e63 0%, transparent 55%),
                      linear-gradient(180deg, #0b1020 0%, #0f152b 100%);
}

/* ============ Reset & Base ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
                 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    transition: background var(--transition), color var(--transition);
    min-height: 100vh;
    overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-light); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; font-size: inherit; color: inherit; }
h1, h2, h3, h4, h5 { line-height: 1.3; font-weight: 700; color: var(--text); }
.container { max-width: var(--container-w); margin: 0 auto; padding: 0 20px; }
.section { padding: 72px 0; }
.text-muted { color: var(--text-muted); }
.gradient-text {
    background: var(--gradient-brand);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

/* ============ Buttons ============ */
.wb-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 22px; border-radius: var(--radius-sm);
    font-size: 15px; font-weight: 600; line-height: 1;
    transition: all var(--transition); cursor: pointer; border: 1.5px solid transparent;
    white-space: nowrap;
}
.wb-btn-sm { padding: 8px 16px; font-size: 13px; }
.wb-btn-lg { padding: 15px 30px; font-size: 16px; border-radius: var(--radius); }
.wb-btn-block { width: 100%; }
.wb-btn-primary { background: var(--gradient-brand); color: #fff; box-shadow: 0 4px 14px rgba(79,70,229,.28); }
.wb-btn-primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 8px 22px rgba(79,70,229,.38); }
.wb-btn-outline { background: transparent; color: var(--text); border-color: var(--border); }
.wb-btn-outline:hover { border-color: var(--primary); background: var(--primary-bg); color: var(--primary); }
.wb-btn-ghost { background: transparent; color: var(--text-secondary); }
.wb-btn-ghost:hover { background: var(--bg-hover); color: var(--text); }

/* ============ Header ============ */
.wb-header {
    position: fixed; top: 0; left: 0; right: 0; height: var(--header-h);
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    backdrop-filter: saturate(180%) blur(14px); -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid transparent; z-index: 200; transition: all var(--transition);
}
.wb-header.scrolled { border-bottom-color: var(--border); box-shadow: var(--shadow-sm); }
.wb-header-inner { max-width: var(--container-w); margin: 0 auto; padding: 0 20px; height: 100%;
    display: flex; align-items: center; gap: 28px; }
.wb-logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; color: var(--text) !important; white-space: nowrap; }
.wb-logo .logo-mark {
    width: 38px; height: 38px; border-radius: 11px; background: var(--gradient-brand);
    display: flex; align-items: center; justify-content: center; font-size: 22px; box-shadow: var(--shadow-glow);
}
.wb-logo .logo-text { letter-spacing: -.3px; }
.wb-logo .logo-hl { color: var(--primary); }
.wb-logo .logo-sub { font-size: 12px; font-weight: 600; color: var(--text-muted); margin-left: 2px; }

.wb-nav { display: flex; align-items: center; gap: 4px; flex: 1; }
.wb-nav li { position: relative; }
.wb-nav-link {
    display: flex; align-items: center; gap: 5px; padding: 9px 14px; border-radius: var(--radius-sm);
    color: var(--text-secondary) !important; font-size: 15px; font-weight: 500; transition: all var(--transition);
}
.wb-nav-link:hover, .wb-nav-link.active { background: var(--bg-hover); color: var(--text) !important; }
.wb-nav-link.active { color: var(--primary) !important; background: var(--primary-bg); }
.wb-nav .dropdown-menu {
    position: absolute; top: calc(100% + 8px); left: 0; min-width: 210px;
    background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius);
    box-shadow: var(--shadow-lg); padding: 8px; opacity: 0; visibility: hidden; transform: translateY(8px);
    transition: all var(--transition); z-index: 50;
}
.wb-nav li:hover .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.wb-nav .dropdown-menu a { display: block; padding: 9px 14px; border-radius: 8px; color: var(--text-secondary) !important; font-size: 14px; }
.wb-nav .dropdown-menu a:hover { background: var(--bg-hover); color: var(--primary) !important; }

.wb-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.wb-theme-toggle {
    width: 38px; height: 38px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    color: var(--text-secondary); transition: all var(--transition); border: 1px solid var(--border);
}
.wb-theme-toggle:hover { background: var(--bg-hover); color: var(--primary); }
.wb-theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .wb-theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .wb-theme-toggle .icon-moon { display: block; }

.wb-search-btn {
    width: 38px; height: 38px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
    color: var(--text-secondary); border: 1px solid var(--border); transition: all var(--transition);
}
.wb-search-btn:hover { background: var(--bg-hover); color: var(--primary); }

.wb-user-area { display: flex; align-items: center; gap: 8px; }
.wb-user-dropdown { position: relative; }
.wb-user-btn { display: flex; align-items: center; gap: 8px; padding: 5px 10px 5px 6px; border-radius: 999px; transition: background var(--transition); border: 1px solid var(--border); }
.wb-user-btn:hover { background: var(--bg-hover); }
.wb-avatar { width: 30px; height: 30px; border-radius: 50%; background: var(--gradient-brand); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 700; }
.wb-user-name { font-size: 14px; color: var(--text); font-weight: 500; }
.wb-user-dropdown .wb-dropdown-menu {
    position: absolute; top: calc(100% + 8px); right: 0; min-width: 170px; background: var(--bg-elevated);
    border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 6px; display: none; z-index: 60;
}
.wb-user-dropdown.open .wb-dropdown-menu { display: block; }
.wb-dropdown-menu a { display: block; padding: 9px 14px; border-radius: 8px; color: var(--text-secondary) !important; font-size: 14px; }
.wb-dropdown-menu a:hover { background: var(--bg-hover); color: var(--primary) !important; }
.wb-dropdown-divider { height: 1px; background: var(--border); margin: 5px 0; }

/* 会员图标（仅移动/平板显示，PC 隐藏） */
.wb-only-mobile { display: none; }
.wb-member-icon {
    width: 38px; height: 38px; border-radius: 50%;
    display: none; align-items: center; justify-content: center;
    color: var(--text-secondary); border: 1px solid var(--border);
    transition: all var(--transition);
}
.wb-member-icon:hover { background: var(--bg-hover); color: var(--primary); }
.wb-member-icon svg { width: 20px; height: 20px; }

.wb-menu-toggle { display: none; width: 42px; height: 42px; border-radius: 10px; align-items: center; justify-content: center; color: var(--text); border: 1px solid var(--border); }
.wb-menu-toggle span { display: block; width: 20px; height: 2px; background: var(--text); border-radius: 2px; position: relative; transition: .25s; }
.wb-menu-toggle span::before, .wb-menu-toggle span::after { content: ''; position: absolute; left: 0; width: 20px; height: 2px; background: var(--text); border-radius: 2px; transition: .25s; }
.wb-menu-toggle span::before { top: -6px; } .wb-menu-toggle span::after { top: 6px; }

/* ============ Mobile Drawer ============ */
.wb-drawer-overlay { position: fixed; inset: 0; background: rgba(8,12,24,.5); opacity: 0; visibility: hidden; transition: .3s; z-index: 290; }
.wb-drawer-overlay.open { opacity: 1; visibility: visible; }
.wb-drawer {
    position: fixed; top: 0; right: 0; bottom: 0; width: 84%; max-width: 360px; background: var(--bg-elevated);
    z-index: 300; transform: translateX(100%); transition: transform .32s cubic-bezier(.4,0,.2,1);
    display: flex; flex-direction: column; box-shadow: var(--shadow-lg);
}
.wb-drawer.open { transform: translateX(0); }
.wb-drawer-head { display: flex; align-items: center; justify-content: space-between; padding: 18px 20px; border-bottom: 1px solid var(--border); }
.wb-drawer-close { width: 40px; height: 40px; border-radius: 10px; display: flex; align-items: center; justify-content: center; color: var(--text); }
.wb-drawer-close:hover { background: var(--bg-hover); }
.wb-drawer-nav { flex: 1; overflow-y: auto; padding: 12px 16px; }
.wb-drawer-nav > li { border-bottom: 1px solid var(--border-light); }
.wb-drawer-link { display: flex; align-items: center; justify-content: space-between; width: 100%; padding: 15px 8px; color: var(--text) !important; font-size: 16px; font-weight: 600; }
.wb-drawer-sub { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.wb-drawer-sub.open { max-height: 400px; }
.wb-drawer-sub a { display: block; padding: 11px 18px; color: var(--text-secondary) !important; font-size: 14px; }
.wb-drawer-sub a:hover { color: var(--primary) !important; }
.wb-drawer-footer { padding: 18px 20px; border-top: 1px solid var(--border); }
.wb-drawer-footer .wb-btn { width: 100%; }

/* ============ Search Modal ============ */
.wb-search-modal { position: fixed; inset: 0; z-index: 320; display: none; align-items: flex-start; justify-content: center; padding-top: 14vh; }
.wb-search-modal.open { display: flex; }
.wb-search-modal .sm-overlay { position: absolute; inset: 0; background: rgba(8,12,24,.55); backdrop-filter: blur(4px); }
.wb-search-modal .sm-box { position: relative; width: min(640px, 92vw); background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); padding: 22px; animation: smIn .25s ease; }
@keyframes smIn { from { opacity: 0; transform: translateY(-12px); } to { opacity: 1; transform: translateY(0); } }
.wb-search-modal .sm-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.wb-search-modal .sm-close { width: 36px; height: 36px; border-radius: 10px; display: flex; align-items: center; justify-content: center; color: var(--text-muted); }
.wb-search-modal .sm-close:hover { background: var(--bg-hover); }
.wb-search-input-wrap { display: flex; align-items: center; gap: 10px; padding: 12px 16px; border: 2px solid var(--border); border-radius: var(--radius); background: var(--bg); transition: border-color .2s; }
.wb-search-input-wrap:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-bg); }
.wb-search-input-wrap input { flex: 1; border: none; outline: none; background: transparent; font-size: 16px; color: var(--text); }
.wb-search-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.wb-search-tag { padding: 6px 14px; border-radius: 999px; background: var(--bg-hover); color: var(--text-secondary) !important; font-size: 13px; }
.wb-search-tag:hover { background: var(--primary-bg); color: var(--primary) !important; }

/* ============ Hero ============ */
.wb-hero { position: relative; padding: calc(var(--header-h) + 64px) 0 72px; background: var(--gradient-hero); overflow: hidden; }
.wb-hero::after { content: ''; position: absolute; inset: 0; background-image: linear-gradient(rgba(79,70,229,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(79,70,229,.04) 1px, transparent 1px); background-size: 48px 48px; mask-image: radial-gradient(circle at 50% 30%, #000, transparent 75%); }
.wb-hero .container { position: relative; z-index: 1; }
.wb-hero-inner { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.wb-hero-badge { display: inline-flex; align-items: center; gap: 8px; padding: 7px 16px; background: var(--bg-card); border: 1px solid var(--border); border-radius: 999px; font-size: 13px; font-weight: 600; color: var(--primary); box-shadow: var(--shadow-sm); margin-bottom: 22px; }
.wb-hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 0 4px rgba(16,163,129,.18); }
.wb-hero-title { font-size: 52px; line-height: 1.12; margin-bottom: 18px; letter-spacing: -.5px; }
.wb-hero-sub { font-size: 18px; color: var(--text-secondary); margin-bottom: 30px; max-width: 560px; }
.wb-hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.wb-hero-stats { display: flex; gap: 30px; margin-top: 40px; }
.wb-hero-stats .hs-num { font-size: 30px; font-weight: 800; background: var(--gradient-brand); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.wb-hero-stats .hs-label { font-size: 13px; color: var(--text-muted); }
.wb-hero-stats .hs-divider { width: 1px; background: var(--border); }

/* Hero visual (animated cards) */
.wb-hero-visual { position: relative; height: 380px; }
.wb-float-card {
    position: absolute; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px;
    width: 140px; height: 140px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg); font-weight: 700; color: var(--text); animation: wbFloat 4s ease-in-out infinite; text-align: center; padding: 10px;
}
.wb-float-card .fc-icon { font-size: 38px; }
.wb-float-card .fc-label { font-size: 13px; color: var(--text-secondary); font-weight: 600; }
.wb-fc-1 { top: 10px; left: 6%; animation-delay: 0s; }
.wb-fc-2 { top: 40px; right: 2%; animation-delay: .6s; }
.wb-fc-3 { bottom: 30px; left: 18%; animation-delay: 1.2s; }
.wb-fc-4 { bottom: 50px; right: 8%; animation-delay: 1.8s; }
@keyframes wbFloat { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }

/* ============ Section common ============ */
.wb-sec-head { text-align: center; max-width: 720px; margin: 0 auto 48px; }
.wb-sec-tag { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 2px; color: var(--primary); text-transform: uppercase; margin-bottom: 12px; }
.wb-sec-title { font-size: 34px; margin-bottom: 14px; letter-spacing: -.5px; }
.wb-sec-sub { font-size: 17px; color: var(--text-secondary); }
.wb-sec-head.left { text-align: left; margin-left: 0; }

/* ============ Topic Cards (核心学习方向) ============ */
.wb-topic-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.wb-topic-card {
    position: relative; display: flex; flex-direction: column; padding: 28px 24px; border-radius: var(--radius-lg);
    background: var(--bg-card); border: 1px solid var(--border); overflow: hidden; transition: all var(--transition); color: var(--text) !important;
}
.wb-topic-card::before { content: ''; position: absolute; inset: 0; background: var(--gradient-brand); opacity: 0; transition: opacity .3s; }
.wb-topic-card > * { position: relative; z-index: 1; }
.wb-topic-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.wb-topic-card:hover::before { opacity: .06; }
.wb-topic-icon { width: 56px; height: 56px; border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 28px; background: var(--primary-bg); margin-bottom: 18px; }
.wb-topic-card h3 { font-size: 19px; margin-bottom: 8px; }
.wb-topic-card p { font-size: 14px; color: var(--text-secondary); flex: 1; margin-bottom: 16px; }
.wb-topic-card .wb-topic-link { font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; transition: gap .2s; }
.wb-topic-card:hover .wb-topic-link { gap: 10px; }

/* ============ Feature Cards ============ */
.wb-feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.wb-feature-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 32px 26px; transition: all var(--transition); }
.wb-feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.wb-feature-icon { width: 54px; height: 54px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 26px; margin-bottom: 18px; }
.wb-feature-icon.i1 { background: #eef2ff; } .wb-feature-icon.i2 { background: #f5f3ff; }
.wb-feature-icon.i3 { background: #ecfeff; } .wb-feature-icon.i4 { background: #f0fdf4; }
.wb-feature-icon.i5 { background: #fff7ed; } .wb-feature-icon.i6 { background: #fdf2f8; }
.wb-feature-card h3 { font-size: 18px; margin-bottom: 10px; }
.wb-feature-card p { font-size: 14px; color: var(--text-secondary); }

/* ============ Product / Article Cards ============ */
.wb-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.wb-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; transition: all var(--transition); display: flex; flex-direction: column; }
.wb-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.wb-card .wb-card-cover { aspect-ratio: 16/9; background: var(--gradient-brand-soft); display: flex; align-items: center; justify-content: center; font-size: 44px; overflow: hidden; }
.wb-card .wb-card-cover img { width: 100%; height: 100%; object-fit: cover; }
.wb-card .wb-card-body { padding: 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.wb-card .wb-card-tag { align-self: flex-start; font-size: 12px; font-weight: 600; color: var(--primary); background: var(--primary-bg); padding: 3px 12px; border-radius: 999px; }
.wb-card h3 { font-size: 18px; line-height: 1.4; }
.wb-card h3 a { color: var(--text) !important; }
.wb-card h3 a:hover { color: var(--primary) !important; }
.wb-card p { font-size: 14px; color: var(--text-secondary); flex: 1; }
.wb-card .wb-card-meta { display: flex; align-items: center; justify-content: space-between; font-size: 13px; color: var(--text-muted); margin-top: auto; }
.wb-card .wb-read-more { color: var(--primary); font-weight: 600; }

/* ============ CTA / Inquiry ============ */
.wb-cta { background: var(--gradient-brand); border-radius: var(--radius-xl); padding: 56px 48px; text-align: center; color: #fff; position: relative; overflow: hidden; }
.wb-cta h2 { color: #fff; font-size: 30px; margin-bottom: 12px; }
.wb-cta p { color: rgba(255,255,255,.9); margin-bottom: 26px; font-size: 16px; }
.wb-cta .wb-btn-outline { border-color: rgba(255,255,255,.6); color: #fff !important; }
.wb-cta .wb-btn-outline:hover { background: rgba(255,255,255,.14); }

.wb-inquiry-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.wb-inquiry-info h2 { font-size: 30px; margin-bottom: 14px; }
.wb-inquiry-info p { color: var(--text-secondary); margin-bottom: 22px; font-size: 16px; }
.wb-inquiry-feats { display: flex; flex-direction: column; gap: 12px; }
.wb-inquiry-feats li { display: flex; align-items: center; gap: 10px; color: var(--text-secondary); font-size: 15px; }
.wb-inquiry-feats .ck { width: 22px; height: 22px; border-radius: 50%; background: var(--success-bg); color: var(--success); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.wb-inquiry-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 30px; box-shadow: var(--shadow); }
.wb-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.wb-form-group { margin-bottom: 16px; }
.wb-form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 7px; color: var(--text); }
.wb-form-group .req { color: var(--danger); }
.wb-input, .wb-textarea, .wb-select {
    width: 100%; padding: 12px 15px; border: 1.5px solid var(--border); border-radius: var(--radius-sm);
    background: var(--bg); color: var(--text); font-size: 15px; outline: none; transition: all var(--transition); font-family: inherit;
}
.wb-input:focus, .wb-textarea:focus, .wb-select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-bg); }
.wb-textarea { resize: vertical; min-height: 110px; }
.wb-select-wrap { position: relative; }
.wb-select-wrap .wb-select { appearance: none; padding-right: 40px; }
.wb-select-wrap .sel-arrow { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); pointer-events: none; color: var(--text-muted); }

/* ============ Page Hero (inner pages) ============ */
.wb-page-hero { padding: calc(var(--header-h) + 50px) 0 40px; background: var(--gradient-hero); }
.wb-page-hero h1 { font-size: 40px; margin-bottom: 12px; letter-spacing: -.5px; }
.wb-page-hero p { font-size: 17px; color: var(--text-secondary); max-width: 640px; }
.wb-breadcrumb { font-size: 14px; color: var(--text-muted); margin-bottom: 14px; }
.wb-breadcrumb a { color: var(--text-muted); } .wb-breadcrumb a:hover { color: var(--primary); }

/* ============ About page ============ */
.wb-about-lead { font-size: 19px; line-height: 1.9; color: var(--text-secondary); max-width: 820px; }
.wb-value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.wb-value-card { padding: 28px 24px; border-radius: var(--radius-lg); background: var(--bg-card); border: 1px solid var(--border); }
.wb-value-card .vc-icon { font-size: 34px; margin-bottom: 14px; }
.wb-value-card h3 { font-size: 18px; margin-bottom: 8px; }
.wb-value-card p { font-size: 14px; color: var(--text-secondary); }
.wb-stat-band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 36px; background: var(--gradient-brand); border-radius: var(--radius-xl); color: #fff; }
.wb-stat-band .sb-item { text-align: center; }
.wb-stat-band .sb-num { font-size: 38px; font-weight: 800; }
.wb-stat-band .sb-label { font-size: 14px; opacity: .9; }
.wb-timeline { max-width: 760px; margin: 0 auto; position: relative; padding-left: 28px; }
.wb-timeline::before { content: ''; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--border); }
.wb-tl-item { position: relative; padding-bottom: 30px; }
.wb-tl-item::before { content: ''; position: absolute; left: -25px; top: 6px; width: 14px; height: 14px; border-radius: 50%; background: var(--gradient-brand); border: 3px solid var(--bg); }
.wb-tl-item .tl-year { font-weight: 700; color: var(--primary); }
.wb-tl-item h4 { font-size: 17px; margin: 4px 0 6px; }
.wb-tl-item p { color: var(--text-secondary); font-size: 14px; }

/* ============ Contact page ============ */
.wb-contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; }
.wb-contact-info .ci-item { display: flex; gap: 14px; padding: 18px 0; border-bottom: 1px solid var(--border-light); }
.wb-contact-info .ci-icon { width: 44px; height: 44px; border-radius: 12px; background: var(--primary-bg); color: var(--primary); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.wb-contact-info .ci-item h4 { font-size: 15px; margin-bottom: 3px; }
.wb-contact-info .ci-item p, .wb-contact-info .ci-item a { color: var(--text-secondary); font-size: 14px; }

/* ============ Blog list ============ */
.wb-blog-layout { display: grid; grid-template-columns: 1fr 300px; gap: 40px; align-items: start; }
.wb-blog-list { display: flex; flex-direction: column; gap: 22px; }
.wb-post { display: grid; grid-template-columns: 220px 1fr; gap: 22px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; transition: all var(--transition); }
.wb-post:hover { box-shadow: var(--shadow); }
.wb-post .wb-post-cover { aspect-ratio: 4/3; background: var(--gradient-brand-soft); display: flex; align-items: center; justify-content: center; font-size: 40px; }
.wb-post .wb-post-cover img { width: 100%; height: 100%; object-fit: cover; }
.wb-post .wb-post-body { padding: 22px 22px 22px 0; display: flex; flex-direction: column; gap: 8px; }
.wb-post .wb-post-meta { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--text-muted); }
.wb-post .wb-post-cat { color: var(--primary); font-weight: 600; }
.wb-post h3 { font-size: 20px; line-height: 1.4; }
.wb-post h3 a { color: var(--text) !important; } .wb-post h3 a:hover { color: var(--primary) !important; }
.wb-post p { font-size: 14px; color: var(--text-secondary); flex: 1; }
.wb-sidebar { position: sticky; top: calc(var(--header-h) + 20px); display: flex; flex-direction: column; gap: 22px; }
.wb-side-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 22px; }
.wb-side-card h4 { font-size: 16px; margin-bottom: 14px; padding-bottom: 10px; border-bottom: 1px solid var(--border-light); }
.wb-cat-list li { margin-bottom: 4px; }
.wb-cat-list a { display: flex; justify-content: space-between; padding: 8px 12px; border-radius: 8px; color: var(--text-secondary) !important; font-size: 14px; }
.wb-cat-list a:hover, .wb-cat-list a.active { background: var(--primary-bg); color: var(--primary) !important; }
.wb-tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.wb-tag-cloud a { padding: 5px 12px; border-radius: 999px; background: var(--bg-hover); color: var(--text-secondary) !important; font-size: 13px; }
.wb-tag-cloud a:hover { background: var(--primary-bg); color: var(--primary) !important; }

/* ============ Blog detail (prose) ============ */
.wb-article-wrap { max-width: 820px; margin: 0 auto; }
.wb-prose { font-size: 16.5px; line-height: 1.95; color: var(--text-secondary); }
.wb-prose h2 { font-size: 26px; margin: 36px 0 16px; color: var(--text); }
.wb-prose h3 { font-size: 21px; margin: 28px 0 12px; color: var(--text); }
.wb-prose p { margin-bottom: 18px; }
.wb-prose ul, .wb-prose ol { margin: 0 0 18px 22px; }
.wb-prose li { margin-bottom: 8px; }
.wb-prose ul li { list-style: disc; } .wb-prose ol li { list-style: decimal; }
.wb-prose a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.wb-prose code { background: var(--bg-hover); padding: 2px 7px; border-radius: 5px; font-size: .9em; font-family: 'SF Mono', Consolas, monospace; color: var(--primary-2); }
.wb-prose pre { background: #0f172a; color: #e2e8f0; padding: 18px; border-radius: var(--radius); overflow-x: auto; margin-bottom: 18px; }
.wb-prose pre code { background: none; color: inherit; padding: 0; }
.wb-prose blockquote { border-left: 4px solid var(--primary); padding: 8px 18px; margin: 0 0 18px; background: var(--primary-bg); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text); }
.wb-prose img { border-radius: var(--radius); margin: 10px 0; }
.wb-prose table { width: 100%; border-collapse: collapse; margin-bottom: 18px; }
.wb-prose th, .wb-prose td { border: 1px solid var(--border); padding: 10px 12px; text-align: left; }
.wb-prose th { background: var(--bg-hover); }

.wb-prevnext { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 36px; }
.wb-pn-card { padding: 16px 20px; border: 1px solid var(--border); border-radius: var(--radius); transition: all var(--transition); }
.wb-pn-card:hover { border-color: var(--primary); background: var(--primary-bg); }
.wb-pn-card .pn-dir { font-size: 12px; color: var(--text-muted); }
.wb-pn-card .pn-title { font-size: 15px; font-weight: 600; color: var(--text); }
.wb-pn-card.next { text-align: right; }

/* ============ Product detail ============ */
.wb-product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.wb-product-hero { aspect-ratio: 16/10; border-radius: var(--radius-xl); background: var(--gradient-brand-soft); display: flex; align-items: center; justify-content: center; font-size: 80px; overflow: hidden; }
.wb-product-hero img { width: 100%; height: 100%; object-fit: cover; }
.wb-product-info h1 { font-size: 32px; margin-bottom: 12px; }
.wb-product-info .wb-price { font-size: 26px; font-weight: 800; color: var(--primary); margin: 14px 0; }
.wb-product-meta { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0; }
.wb-product-meta span { font-size: 13px; padding: 5px 13px; background: var(--bg-hover); border-radius: 999px; color: var(--text-secondary); }
.wb-related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* ============ Search / Tag ============ */
.wb-result-tabs { display: flex; gap: 10px; margin-bottom: 28px; flex-wrap: wrap; }
.wb-result-tab { padding: 9px 18px; border-radius: 999px; border: 1px solid var(--border); font-size: 14px; font-weight: 600; color: var(--text-secondary) !important; }
.wb-result-tab.active, .wb-result-tab:hover { background: var(--primary-bg); color: var(--primary) !important; border-color: transparent; }
.wb-empty { text-align: center; padding: 70px 20px; color: var(--text-muted); }
.wb-empty .wb-empty-icon { font-size: 56px; margin-bottom: 12px; }

/* ============ Pagination ============ */
.wb-pagination { display: flex; justify-content: center; gap: 8px; margin-top: 40px; flex-wrap: wrap; }
.wb-pagination a, .wb-pagination span { min-width: 40px; height: 40px; padding: 0 12px; display: inline-flex; align-items: center; justify-content: center; border-radius: 10px; border: 1px solid var(--border); color: var(--text-secondary) !important; font-size: 14px; }
.wb-pagination a:hover { border-color: var(--primary); color: var(--primary) !important; }
.wb-pagination .current { background: var(--gradient-brand); color: #fff !important; border-color: transparent; }

/* ============ Footer ============ */
.wb-footer { background: var(--bg-alt); border-top: 1px solid var(--border); padding: 56px 0 28px; margin-top: 40px; }
.wb-footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 36px; }
.wb-footer .f-brand .wb-logo { margin-bottom: 14px; }
.wb-footer .f-desc { color: var(--text-secondary); font-size: 14px; max-width: 300px; }
.wb-footer .f-social { display: flex; gap: 10px; margin-top: 16px; }
.wb-footer .f-social a { width: 38px; height: 38px; border-radius: 10px; background: var(--bg-card); border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; color: var(--text-secondary); transition: all var(--transition); }
.wb-footer .f-social a:hover { background: var(--primary); color: #fff; border-color: transparent; }
.wb-footer h4 { font-size: 15px; margin-bottom: 16px; }
.wb-footer .f-links li { margin-bottom: 10px; }
.wb-footer .f-links a { color: var(--text-secondary) !important; font-size: 14px; }
.wb-footer .f-links a:hover { color: var(--primary) !important; }
.wb-footer .f-contact li { display: flex; gap: 8px; align-items: flex-start; color: var(--text-secondary); font-size: 14px; margin-bottom: 10px; }
.wb-footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; padding-top: 24px; margin-top: 36px; border-top: 1px solid var(--border); font-size: 13px; color: var(--text-muted); }
.wb-footer-bottom a { color: var(--text-muted); }

/* ============ Floating actions ============ */
.wb-fab { position: fixed; right: 22px; bottom: 22px; display: flex; flex-direction: column; gap: 12px; z-index: 150; opacity: 0; transform: translateY(20px); pointer-events: none; transition: all .3s; }
.wb-fab.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.wb-fab a, .wb-fab button { width: 46px; height: 46px; border-radius: 14px; background: var(--bg-elevated); border: 1px solid var(--border); box-shadow: var(--shadow); display: flex; align-items: center; justify-content: center; color: var(--text-secondary); transition: all var(--transition); }
.wb-fab a:hover, .wb-fab button:hover { background: var(--primary); color: #fff; border-color: transparent; }

/* ============ Toast ============ */
.wb-toast { position: fixed; top: 84px; left: 50%; transform: translateX(-50%) translateY(-12px); padding: 13px 26px; border-radius: var(--radius-sm); color: #fff; font-weight: 600; font-size: 14px; z-index: 999; opacity: 0; transition: all .3s; box-shadow: var(--shadow-lg); }
.wb-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.wb-toast.success { background: #16a34a; } .wb-toast.error { background: #ef4444; }

/* ============ Animations ============ */
.fade-up { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.fade-up.in { opacity: 1; transform: translateY(0); }

/* ============ Responsive ============ */
@media (max-width: 1024px) {
    .wb-hero-inner { grid-template-columns: 1fr; gap: 36px; }
    .wb-hero-visual { display: none; }
    .wb-topic-grid { grid-template-columns: repeat(2, 1fr); }
    .wb-feature-grid, .wb-grid-3 { grid-template-columns: repeat(2, 1fr); }
    .wb-blog-layout { grid-template-columns: 1fr; }
    .wb-sidebar { position: static; flex-direction: row; flex-wrap: wrap; }
    .wb-sidebar .wb-side-card { flex: 1; min-width: 240px; }
    .wb-related-grid { grid-template-columns: repeat(2, 1fr); }

    /* 移动/平板顶栏：隐藏内联导航与登录注册文字按钮，改为 搜索/主题/会员/菜单 四图标 */
    .wb-nav { display: none; }
    .wb-user-area { display: none; }
    .wb-login-links { display: none; }
    .wb-menu-toggle { display: flex; }
    .wb-only-mobile { display: flex; }
    .wb-member-icon { display: flex; }
    .wb-actions { gap: 8px; }
}
@media (max-width: 760px) {
    .wb-user-name { display: none; }
    .wb-header-inner { gap: 12px; }
    .section { padding: 52px 0; }
    .wb-hero { padding-top: calc(var(--header-h) + 36px); }
    .wb-hero-title { font-size: 34px; }
    .wb-hero-stats { gap: 18px; flex-wrap: wrap; }
    .wb-sec-title { font-size: 26px; }
    .wb-topic-grid, .wb-feature-grid, .wb-grid-3, .wb-value-grid, .wb-related-grid { grid-template-columns: 1fr; }
    .wb-inquiry-wrap, .wb-contact-grid, .wb-product-detail { grid-template-columns: 1fr; gap: 28px; }
    .wb-form-row { grid-template-columns: 1fr; }
    .wb-post { grid-template-columns: 1fr; }
    .wb-post .wb-post-cover { aspect-ratio: 16/9; }
    .wb-post .wb-post-body { padding: 18px; }
    .wb-stat-band { grid-template-columns: repeat(2, 1fr); gap: 16px; padding: 26px 18px; }
    .wb-prevnext { grid-template-columns: 1fr; }
    .wb-footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
    .wb-footer-bottom { flex-direction: column; align-items: flex-start; }
    .wb-cta { padding: 40px 24px; }
}
@media (max-width: 460px) {
    .wb-footer-grid { grid-template-columns: 1fr; }
}