/* ==========================================================================
   main.css - 主样式（暗色霓虹科技风：深蓝黑底 + 霓虹紫/青/粉 + 光晕）
   ========================================================================== */

:root {
    /* === 配色系统（暗色霓虹科技风） === */
    --bg-primary: #0a0e1a;                 /* 深蓝黑主背景 */
    --bg-secondary: #0f1424;               /* 次级背景 */
    --bg-card: rgba(20, 28, 48, 0.55);     /* 玻璃卡片底 */
    --bg-card-hover: rgba(28, 38, 64, 0.72);
    --bg-input: #11182b;                   /* 输入框 */
    --border: rgba(124, 58, 237, 0.22);    /* 霓虹紫边框 */
    --border-light: rgba(124, 58, 237, 0.12);
    --border-strong: rgba(0, 240, 255, 0.35);/* 霓虹青强边框 */

    --text-primary: #e8ecf6;
    --text-secondary: #aab4c8;
    --text-muted: #6b7689;
    --text-dim: #4a5366;

    /* === 主题色（霓虹紫 / 青 / 粉） === */
    --accent: #7c3aed;          /* 霓虹紫 */
    --accent-2: #00f0ff;        /* 霓虹青 */
    --accent-3: #f472b6;        /* 霓虹粉 */
    --accent-4: #10b981;        /* 成功绿 */
    --warn: #f59e0b;
    --danger: #ef4444;

    --gradient-1: linear-gradient(135deg, #7c3aed 0%, #00f0ff 100%);
    --gradient-2: linear-gradient(135deg, #00f0ff 0%, #7c3aed 100%);
    --gradient-3: linear-gradient(135deg, #f472b6 0%, #7c3aed 100%);
    --gradient-4: linear-gradient(135deg, #1a1140 0%, #0a0e1a 100%);
    --gradient-blue-soft: linear-gradient(135deg, rgba(124,58,237,0.18) 0%, rgba(0,240,255,0.10) 100%);

    /* === 阴影（深色 + 霓虹光晕） === */
    --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 12px 36px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 28px 64px rgba(0, 0, 0, 0.55);
    --glow-blue: 0 0 36px rgba(124, 58, 237, 0.45);
    --glow-cyan: 0 0 36px rgba(0, 240, 255, 0.4);

    /* === 圆角 === */
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;

    /* === 字体 === */
    --font-base: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont,
                 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    --font-display: 'Orbitron', 'Inter', sans-serif;
}

body {
    font-family: var(--font-base);
    color: var(--text-primary);
    background: var(--bg-primary);
    font-size: 16px;
    line-height: 1.7;
    font-weight: 400;
    letter-spacing: 0.01em;
    overflow-x: hidden;
    position: relative;
}

/* === 全局背景层（暗色霓虹：粒子 + 网格 + 光晕） === */
.particle-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 1;
}

.grid-bg {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(124, 58, 237, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.05) 1px, transparent 1px);
    background-size: 80px 80px;
    mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
    pointer-events: none;
    z-index: 0;
}

/* 霓虹光晕 */
.orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    z-index: 0;
    pointer-events: none;
    opacity: 0.55;
}
.orb-1 {
    width: 540px; height: 540px;
    top: -140px; left: -100px;
    background: radial-gradient(circle, rgba(124,58,237,0.5), transparent 70%);
}
.orb-2 {
    width: 480px; height: 480px;
    bottom: -120px; right: -80px;
    background: radial-gradient(circle, rgba(0,240,255,0.4), transparent 70%);
}
.orb-3 {
    width: 380px; height: 380px;
    top: 40%; left: 55%;
    background: radial-gradient(circle, rgba(244,114,182,0.32), transparent 70%);
}

/* 自定义霓虹光标 */
.cursor {
    position: fixed; top: 0; left: 0;
    width: 8px; height: 8px;
    border-radius: 50%;
    background: #00f0ff;
    box-shadow: 0 0 12px #00f0ff;
    transform: translate(-50%, -50%);
    pointer-events: none; z-index: 9999;
    transition: width .2s, height .2s;
}
.cursor-follower {
    position: fixed; top: 0; left: 0;
    width: 32px; height: 32px;
    border: 1px solid rgba(124,58,237,0.6);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none; z-index: 9998;
    transition: all .12s ease-out;
}

/* === 容器 === */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 32px;
    position: relative;
    z-index: 1;
}

/* === Section === */
.section {
    padding: 82px 0;
    position: relative;
    z-index: 1;
}
.section.section-bg-soft {
    background: var(--bg-secondary);
}

.section-head {
    max-width: 820px;
    margin: 0 auto 52px;
    text-align: center;
}

.section-eyebrow {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--accent);
    letter-spacing: 0.2em;
    margin-bottom: 14px;
    padding: 6px 14px;
    border: 1px solid rgba(124, 58, 237, 0.25);
    border-radius: 100px;
    background: rgba(124, 58, 237, 0.06);
}

.section-title {
    font-size: clamp(36px, 5vw, 60px);
    line-height: 1.15;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 18px;
    color: var(--text-primary);
}
.section-title span { display: inline-block; }

.title-gradient {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    position: relative;
}

.section-desc {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 720px;
    margin: 0 auto;
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 100px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    letter-spacing: 0.02em;
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--gradient-1);
    color: #fff;
    box-shadow: 0 8px 24px rgba(124, 58, 237, 0.45);
}
.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #7c3aed 0%, #00f0ff 100%);
    opacity: 0;
    transition: opacity 0.4s;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(124, 58, 237, 0.55);
}
.btn-primary:hover::before { opacity: 1; }
.btn-primary span, .btn-primary svg { position: relative; z-index: 1; }

.btn-ghost {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
}
.btn-ghost:hover {
    background: var(--bg-secondary);
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

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

/* ==========================================================================
   HEADER
   ========================================================================== */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 16px 0;
    transition: all 0.3s ease;
    background: rgba(10, 14, 26, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
}
.header.scrolled {
    background: rgba(10, 14, 26, 0.92);
    border-bottom-color: var(--border);
    padding: 10px 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--text-primary);
    flex-shrink: 0;
}
.logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}
.logo-cn {
    font-size: 17px;
    font-weight: 800;
    letter-spacing: 0.04em;
}
.logo-en {
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    margin-top: 2px;
    font-family: var(--font-mono);
}

.nav {
    display: flex;
    align-items: center;
}
.nav-list {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px;
    background: rgba(20, 28, 48, 0.55);
    border: 1px solid var(--border);
    border-radius: 100px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.nav-link {
    display: inline-flex;
    align-items: center;
    padding: 8px 18px;
    font-size: 14px;
    font-weight: 500;
    color: rgba(232, 234, 240, 0.78);
    border-radius: 100px;
    transition: all 0.3s;
    position: relative;
}
.nav-link span { position: relative; z-index: 1; }
.nav-link:hover { color: var(--text-primary); background: rgba(124, 58, 237, 0.18); }
.nav-link.active {
    color: #fff;
    background: var(--gradient-1);
    box-shadow: 0 4px 16px rgba(124, 58, 237, 0.45);
}
.nav-cta.active {
    background: var(--gradient-2);
    box-shadow: 0 4px 16px rgba(0, 240, 255, 0.3);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}
.menu-toggle {
    display: none;
    width: 40px; height: 40px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-card);
}
.menu-toggle span {
    width: 18px; height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s;
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.header-progress {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 2px;
    background: var(--gradient-1);
}
.header-progress span {
    display: block;
    height: 100%;
    width: 0%;
    background: var(--gradient-1);
    transition: width 0.1s;
}

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
    min-height: 100vh;
    padding: 112px 0 56px;
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(124, 58, 237, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(124, 58, 237, 0.05) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center top, #000 0%, transparent 60%);
    -webkit-mask-image: radial-gradient(ellipse at center top, #000 0%, transparent 60%);
    animation: grid-shift 30s linear infinite;
}
@keyframes grid-shift {
    0% { background-position: 0 0; }
    100% { background-position: 60px 60px; }
}

.hero-inner {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
}

.hero-content { position: relative; z-index: 2; }

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 18px;
    background: rgba(124, 58, 237, 0.08);
    border: 1px solid rgba(124, 58, 237, 0.25);
    border-radius: 100px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.1em;
    margin-bottom: 18px;
}
.badge-dot {
    width: 6px; height: 6px;
    background: var(--accent-2);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent-2);
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
    font-size: clamp(42px, 6vw, 80px);
    line-height: 1.05;
    font-weight: 900;
    letter-spacing: -0.03em;
    margin-bottom: 22px;
    color: var(--text-primary);
}
.title-line {
    display: block;
    overflow: hidden;
}
.title-line > span {
    display: inline-block;
}
.title-zh { color: var(--text-primary); }
.title-en {
    font-family: var(--font-display);
    font-size: 0.5em;
    color: var(--text-muted);
    margin-left: 14px;
    font-weight: 500;
    letter-spacing: 0.1em;
    vertical-align: middle;
}

.hero-subtitle {
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 30px;
    max-width: 580px;
}
.hero-subtitle strong {
    color: var(--accent);
    font-weight: 600;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 42px;
    flex-wrap: wrap;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding: 28px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.stat {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}
.stat-value {
    display: flex;
    align-items: baseline;
    flex-wrap: nowrap;
    white-space: nowrap;
    margin-bottom: 8px;
}
.stat-num {
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 900;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}
.stat-plus {
    font-family: var(--font-display);
    font-size: 22px;
    color: var(--accent-2);
    margin-left: 2px;
    display: inline-block;
    line-height: 1;
}
.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    white-space: nowrap;
}

/* === Hero Visual === */
.hero-visual {
    position: relative;
    height: 540px;
    z-index: 2;
}
.visual-orb {
    position: absolute;
    top: 50%; left: 50%;
    width: 320px; height: 320px;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, rgba(0, 240, 255, 0.18) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(40px);
    z-index: 0;
    animation: visual-orb-pulse 4s ease-in-out infinite;
}
@keyframes visual-orb-pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.8; }
}

.visual-card {
    position: absolute;
    width: 320px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow-lg);
    transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
    z-index: 1;
}
.card-glow {
    position: absolute;
    inset: -1px;
    border-radius: var(--radius);
    background: var(--gradient-1);
    opacity: 0.18;
    z-index: -1;
    filter: blur(20px);
    transition: opacity 0.4s;
}
.visual-card:hover { transform: translateY(-6px); }
.visual-card:hover .card-glow { opacity: 0.34; }

.card-1 {
    top: 0; left: 30px;
    animation: float-card 8s ease-in-out infinite;
    z-index: 3;
}
.card-2 {
    top: 80px; right: 0;
    animation: float-card 10s ease-in-out infinite 1s;
    z-index: 2;
}
.card-3 {
    bottom: 0; left: 80px;
    animation: float-card 9s ease-in-out infinite 0.5s;
    z-index: 2;
}
@keyframes float-card {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.card-head {
    display: flex;
    align-items: center;
    gap: 6px;
    padding-bottom: 12px;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--border);
}
.card-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--text-dim);
}
.card-dot:nth-child(1) { background: #ef4444; }
.card-dot:nth-child(2) { background: #f59e0b; }
.card-dot:nth-child(3) { background: #10b981; }
.card-title {
    margin-left: 8px;
    font-size: 11px;
    font-family: var(--font-mono);
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

.card-metrics {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 12px;
}
.card-metrics > div {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
}
.m-label { color: var(--text-muted); }
.m-val { font-weight: 700; color: var(--text-primary); }
.m-val.up { color: var(--accent-4); }

.kline-mini {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 8px;
    height: 80px;
}
.kline-mini svg { width: 100%; height: 100%; }

.geo-mini {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 6px 10px;
    align-items: center;
}
.geo-tag {
    font-size: 10px;
    color: var(--text-muted);
    font-family: var(--font-mono);
    text-transform: uppercase;
}
.geo-bar {
    height: 6px;
    background: var(--bg-secondary);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}
.geo-bar::after {
    content: '';
    position: absolute;
    inset: 0;
    width: var(--w, 50%);
    background: var(--gradient-1);
    border-radius: 3px;
    animation: bar-fill 2s ease-out;
}
@keyframes bar-fill {
    from { width: 0; }
}

.app-mini {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.app-row {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-secondary);
}
.app-num { font-weight: 700; }
.app-num.up { color: var(--accent-4); }
.app-num.down { color: var(--danger); }
.app-bar {
    margin-top: 6px;
    height: 4px;
    background: var(--bg-secondary);
    border-radius: 2px;
    overflow: hidden;
}
.app-bar span {
    display: block;
    height: 100%;
    width: var(--w, 0%);
    background: var(--gradient-3);
    border-radius: 2px;
    animation: bar-fill 2s ease-out;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.2em;
    z-index: 5;
    transition: color 0.3s;
}
.hero-scroll:hover { color: var(--accent); }
.scroll-mouse {
    width: 22px; height: 36px;
    border: 1.5px solid currentColor;
    border-radius: 12px;
    position: relative;
}
.scroll-wheel {
    position: absolute;
    top: 8px; left: 50%;
    transform: translateX(-50%);
    width: 3px; height: 6px;
    background: currentColor;
    border-radius: 2px;
    animation: wheel-down 1.6s ease-in-out infinite;
}
@keyframes wheel-down {
    0% { transform: translate(-50%, 0); opacity: 1; }
    100% { transform: translate(-50%, 12px); opacity: 0; }
}

/* ==========================================================================
   CERAMIC SPOTLIGHT（陶瓷产业数字化 重点推荐）
   ========================================================================== */
.ceramic-spotlight {
    position: relative;
    background:
        radial-gradient(900px 400px at 15% 0%, rgba(124, 58, 237, 0.06), transparent 70%),
        radial-gradient(700px 380px at 90% 100%, rgba(0, 240, 255, 0.05), transparent 70%);
}
.ceramic-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 56px;
    align-items: center;
}
.ceramic-text .section-eyebrow {
    color: var(--accent);
}
.ceramic-text .section-desc {
    margin-top: 16px;
}
.ceramic-text .section-desc strong {
    color: var(--text-primary);
    font-weight: 700;
}
.ceramic-flow {
    list-style: none;
    margin: 32px 0;
    display: grid;
    gap: 18px;
}
.ceramic-flow li {
    display: flex;
    gap: 18px;
    align-items: flex-start;
}
.cf-num {
    flex-shrink: 0;
    width: 42px; height: 42px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 12px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 16px;
    color: #fff;
    background: var(--gradient-1);
    box-shadow: 0 6px 18px rgba(124, 58, 237, 0.28);
}
.ceramic-flow h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}
.ceramic-flow p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.ceramic-showcase { position: relative; }
.ceramic-case {
    position: relative;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--bg-card);
    padding: 28px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}
.ceramic-case-glow {
    position: absolute;
    top: -40%; right: -30%;
    width: 320px; height: 320px;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.22), transparent 70%);
    filter: blur(20px);
    pointer-events: none;
}
.ceramic-case-head {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 18px;
}
.cc-tag {
    font-size: 12px;
    font-weight: 700;
    color: #fff;
    padding: 4px 12px;
    border-radius: 100px;
    background: var(--gradient-1);
}
.cc-site {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-secondary);
    letter-spacing: 0.04em;
}
.ceramic-stage {
    position: relative;
    height: 240px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 14px;
    margin-bottom: 22px;
    border-radius: var(--radius-sm);
    background:
        radial-gradient(420px 200px at 50% 120%, rgba(0, 240, 255, 0.12), transparent 70%),
        linear-gradient(180deg, #0f1424, #0a0e1a);
    overflow: hidden;
}
.ceramic-ring {
    position: absolute;
    top: 50%; left: 50%;
    width: 180px; height: 180px;
    transform: translate(-50%, -60%);
    border: 1px dashed rgba(124, 58, 237, 0.3);
    border-radius: 50%;
    animation: ceramic-spin 18s linear infinite;
}
@keyframes ceramic-spin {
    to { transform: translate(-50%, -60%) rotate(360deg); }
}
.ceramic-vase {
    position: relative;
    width: 56px;
    border-radius: 28px 28px 18px 18px / 40px 40px 18px 18px;
    background: linear-gradient(160deg, rgba(47,155,255,0.7), rgba(26,95,191,0.7) 55%, rgba(111,79,240,0.7));
    box-shadow: 0 10px 30px rgba(124, 58, 237, 0.25), inset 0 0 18px rgba(255,255,255,0.5);
    z-index: 1;
}
.ceramic-vase::before {
    content: "";
    position: absolute;
    top: -10px; left: 50%;
    transform: translateX(-50%);
    width: 22px; height: 12px;
    border-radius: 4px;
    background: linear-gradient(160deg, rgba(47,155,255,0.8), rgba(26,95,191,0.8));
}
.ceramic-vase.cv1 { height: 120px; }
.ceramic-vase.cv2 { height: 160px; width: 64px; }
.ceramic-vase.cv3 { height: 100px; }
.ceramic-case-foot { position: relative; }
.ceramic-case-foot h3 {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 4px;
}
.ceramic-case-foot p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

/* ==========================================================================
   ABOUT
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 72px;
}
.about-card {
    position: relative;
    padding: 32px 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all 0.4s;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.about-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 2px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s;
}
.about-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md);
    background: var(--bg-card);
}
.about-card:hover::before { transform: scaleX(1); }

.card-num {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--accent);
    letter-spacing: 0.15em;
    margin-bottom: 14px;
}
.about-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}
.about-card p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-secondary);
}
.card-ic {
    position: absolute;
    bottom: 24px; right: 24px;
    width: 40px; height: 40px;
    color: var(--accent);
    opacity: 0.25;
    transition: opacity 0.3s;
}
.about-card:hover .card-ic { opacity: 1; color: var(--accent-2); }

.about-philosophy {
    text-align: center;
    padding: 54px 34px;
    background: radial-gradient(ellipse at center, rgba(124, 58, 237, 0.06), transparent 70%);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}
.about-philosophy::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.philosophy-quote {
    max-width: 720px;
    margin: 0 auto;
    position: relative;
}
.quote-mark {
    position: absolute;
    top: -30px; left: -20px;
    font-family: var(--font-display);
    font-size: 120px;
    color: var(--accent);
    opacity: 0.18;
    line-height: 1;
}
.philosophy-quote p {
    font-size: 24px;
    line-height: 1.6;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 18px;
}
.philosophy-quote em {
    font-style: normal;
    color: var(--accent);
    font-weight: 700;
}
.quote-author {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-muted);
    letter-spacing: 0.1em;
}

/* ==========================================================================
   SERVICES
   ========================================================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.service-card {
    position: relative;
    padding: 32px 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.service-card::after {
    content: '';
    position: absolute;
    bottom: 0; right: 0;
    width: 200px; height: 200px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.1), transparent 70%);
    border-radius: 50%;
    transform: translate(50%, 50%) scale(0);
    transition: transform 0.5s;
}
.service-card:hover {
    transform: translateY(-6px);
    border-color: rgba(124, 58, 237, 0.35);
    box-shadow: var(--shadow-md);
}
.service-card:hover::after {
    transform: translate(50%, 50%) scale(1);
}

.service-large {
    grid-column: span 2;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.06), rgba(0, 240, 255, 0.03));
    border-color: rgba(124, 58, 237, 0.2);
}

.service-icon {
    width: 56px; height: 56px;
    flex: 0 0 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.12), rgba(0, 240, 255, 0.08));
    border: 1px solid rgba(124, 58, 237, 0.2);
    border-radius: 14px;
    color: var(--accent);
    position: relative;
    z-index: 1;
}
.service-icon svg { width: 28px; height: 28px; }

.service-head {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 18px;
    position: relative;
    z-index: 1;
}
.service-head h3 {
    margin-bottom: 0;
}
.service-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 0;
    color: var(--text-primary);
    line-height: 1.3;
}
.service-large h3 { font-size: 32px; }

.service-card p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 14px;
}

.service-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 18px;
}
.service-list li {
    position: relative;
    padding-left: 24px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}
.service-list li::before {
    content: '';
    position: absolute;
    left: 0; top: 8px;
    width: 14px; height: 2px;
    background: var(--gradient-1);
    border-radius: 1px;
}

.service-stat-row {
    display: flex;
    gap: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}
.service-stat-row > div {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.ss-num {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}
.ss-lbl {
    font-size: 12px;
    color: var(--text-muted);
}

.service-cta {
    grid-column: 1 / -1;
    justify-self: center;
    width: 100%;
    max-width: 760px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 44px 36px;
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(124, 58, 237, 0.08));
    border-color: rgba(124, 58, 237, 0.25);
    box-shadow: 0 0 50px rgba(124, 58, 237, 0.08);
}
.service-cta h3 {
    font-size: 32px;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 16px;
}
.service-cta p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 22px;
    max-width: 420px;
}

/* ==========================================================================
   CASES
   ========================================================================== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.case-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.4s;
    box-shadow: var(--shadow-sm);
}
.case-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-strong);
    box-shadow: var(--shadow-lg);
}

.case-cover {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
    background: linear-gradient(135deg, #161a2e, #0a0e1a);
}

.case-screenshot {
    position: absolute;
    inset: 0;
    padding: 20px;
}
.ss-window {
    width: 100%; height: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
}
.ss-bar {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 8px 12px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}
.ss-bar span {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--text-dim);
}
.ss-bar span:nth-child(1) { background: #ef4444; }
.ss-bar span:nth-child(2) { background: #f59e0b; }
.ss-bar span:nth-child(3) { background: #10b981; }
.ss-content {
    flex: 1;
    padding: 16px;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Case 1: Peltier */
.case-cover-1 .ss-content {
    background: linear-gradient(135deg, #10182c 0%, #0a0e1a 100%);
    color: var(--text-primary);
    align-items: center;
    text-align: center;
}
.ss-logo {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 900;
    letter-spacing: 0.15em;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 6px;
}
.ss-tagline {
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.3em;
    color: var(--text-muted);
    margin-bottom: 16px;
}
.ss-temp {
    display: flex;
    align-items: flex-start;
    margin-bottom: 14px;
}
.ss-temp-num {
    font-family: var(--font-display);
    font-size: 48px;
    font-weight: 900;
    background: linear-gradient(180deg, #7c3aed, #00f0ff);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}
.ss-temp-lbl {
    font-size: 18px;
    color: var(--accent);
    margin-top: 4px;
    margin-left: 4px;
}
.ss-bars {
    display: flex;
    align-items: flex-end;
    gap: 6px;
    height: 40px;
    width: 100%;
    justify-content: center;
}
.ss-bars span {
    flex: 1;
    max-width: 12px;
    background: var(--gradient-1);
    border-radius: 2px 2px 0 0;
    height: var(--h, 50%);
    animation: bar-rise 2s ease-out;
}
@keyframes bar-rise {
    from { height: 0; }
}

/* Case 2: Clayport */
.case-cover-2 .ss-content {
    background: linear-gradient(135deg, #1a1430 0%, #0a0e1a 100%);
    align-items: stretch;
}
.ss-ceramic-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at top, rgba(111, 79, 240, 0.12), transparent 60%);
}
.ss-ceramic-title {
    position: relative;
    z-index: 2;
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 900;
    letter-spacing: 0.1em;
    color: var(--text-primary);
    line-height: 1.1;
    text-align: center;
    margin-bottom: 14px;
}
.ss-ceramic-title span {
    display: block;
    background: linear-gradient(90deg, #00f0ff, #f472b6);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.ss-ceramic-vases {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 12px;
    flex: 1;
    position: relative;
    z-index: 2;
}
.vase {
    width: 30px;
    background: linear-gradient(180deg, #d4a574 0%, #8b5a2b 100%);
    border-radius: 50% 50% 4px 4px / 20% 20% 4px 4px;
    box-shadow: var(--shadow-sm);
}
.vase.v1 { height: 60%; }
.vase.v2 {
    height: 80%;
    background: linear-gradient(180deg, #f0e6d2 0%, #b08968 100%);
    width: 36px;
}
.vase.v3 {
    height: 50%;
    background: linear-gradient(180deg, #4a4a4a 0%, #1a1a1a 100%);
}

/* Case 3: Charging */
.case-cover-3 .ss-content {
    background: linear-gradient(180deg, #10182c 0%, #0a0e1a 100%);
}
.ss-charge-head {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 8px 12px;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 8px;
    margin-bottom: 12px;
}
.ss-charge-icon {
    width: 32px; height: 32px;
    background: var(--gradient-1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 900;
    font-size: 18px;
}
.ss-charge-icon::after { content: '⚡'; }
.ss-charge-stat {
    display: flex;
    flex-direction: column;
}
.ss-charge-num {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
}
.ss-charge-lbl {
    font-size: 10px;
    color: var(--text-muted);
}
.ss-charge-grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
}
.ss-charge-cell {
    background: rgba(0, 240, 255, 0.06);
    border: 1px solid rgba(0, 240, 255, 0.15);
    border-radius: 4px;
    position: relative;
}
.ss-charge-cell::before {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: var(--h, 60%);
    background: var(--gradient-3);
    border-radius: 0 0 3px 3px;
    opacity: 0.8;
}
.ss-charge-cell.c1::before { --h: 80%; }
.ss-charge-cell.c2::before { --h: 45%; }
.ss-charge-cell.c3::before { --h: 95%; }
.ss-charge-cell.c4::before { --h: 30%; }
.ss-charge-cell.c5::before { --h: 70%; }
.ss-charge-cell.c6::before { --h: 55%; }

/* Case 4: Quants */
.case-cover-4 .ss-content {
    background: linear-gradient(180deg, #0f1424, #0a0e1a);
}
.ss-quants-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}
.ss-quants-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
}
.ss-quants-price {
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 700;
    color: var(--danger);
}
.ss-quants-price em {
    font-style: normal;
    font-size: 10px;
    color: var(--text-muted);
    margin-left: 4px;
}
.ss-quants-kline {
    width: 100%;
    height: 80px;
    margin-bottom: 12px;
}
.ss-quants-tags {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.q-tag {
    font-size: 10px;
    padding: 3px 8px;
    border-radius: 4px;
    font-family: var(--font-mono);
}
.q-tag.q-on { background: rgba(16, 185, 129, 0.12); color: #047857; }
.q-tag.q-warn { background: rgba(245, 158, 11, 0.12); color: #b45309; }

/* Case 5: App */
.case-screenshot-mobile {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f0e6d2 0%, #e8d4b8 100%);
}
.phone-frame {
    width: 140px;
    height: 240px;
    background: #1a1a1a;
    border-radius: 18px;
    padding: 4px;
    position: relative;
    box-shadow: var(--shadow-md);
}
.phone-notch {
    position: absolute;
    top: 8px; left: 50%;
    transform: translateX(-50%);
    width: 36px; height: 6px;
    background: #1a1a1a;
    border-radius: 3px;
    z-index: 2;
}
.phone-screen {
    width: 100%; height: 100%;
    background: linear-gradient(180deg, #fff5e6, #f5e6d3);
    border-radius: 14px;
    padding: 16px 12px 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    color: #2a1810;
    overflow: hidden;
}
.m-avatar {
    width: 28px; height: 28px;
    background: #f59e0b;
    border-radius: 50%;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}
.m-avatar::after { content: '🐱'; }
.m-name {
    font-size: 11px;
    font-weight: 700;
    margin-bottom: 2px;
}
.m-slogan {
    font-size: 7px;
    color: #6b5d4f;
    margin-bottom: 8px;
}
.m-stats {
    display: flex;
    gap: 6px;
    width: 100%;
    margin-bottom: 8px;
}
.m-stats > div {
    flex: 1;
    background: rgba(20, 28, 48, 0.6);
    border-radius: 6px;
    padding: 4px;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.m-stat-num {
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 800;
    line-height: 1;
}
.m-stat-num.up { color: #10b981; }
.m-stat-num.down { color: #ef4444; }
.m-stat-lbl {
    font-size: 6px;
    color: #6b5d4f;
    margin-top: 2px;
}
.m-bar {
    width: 100%;
    height: 3px;
    background: rgba(0, 0, 0, 0.08);
    border-radius: 2px;
    overflow: hidden;
    margin-top: auto;
}
.m-bar span {
    display: block;
    height: 100%;
    width: var(--w, 0%);
    background: linear-gradient(90deg, #10b981, #22c55e);
    border-radius: 2px;
}

/* Case 6: GEO */
.case-cover-6 .ss-content {
    background: linear-gradient(180deg, #161a2e, #0f1424);
}
.ss-geo-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}
.ss-geo-logo {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 900;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.ss-geo-badge {
    font-family: var(--font-mono);
    font-size: 8px;
    padding: 3px 6px;
    background: rgba(0, 240, 255, 0.12);
    color: var(--accent);
    border-radius: 4px;
    letter-spacing: 0.1em;
}
.ss-geo-rows {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
    justify-content: center;
}
.ss-geo-row {
    display: flex;
    align-items: center;
    gap: 8px;
}
.ss-geo-tag {
    font-family: var(--font-mono);
    font-size: 8px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    width: 36px;
    text-align: right;
}
.ss-geo-bar {
    flex: 1;
    height: 6px;
    background: var(--bg-secondary);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}
.ss-geo-bar::after {
    content: '';
    position: absolute;
    inset: 0;
    width: var(--w, 50%);
    background: var(--gradient-1);
    border-radius: 3px;
    animation: bar-fill 2s ease-out;
}

.case-shine {
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(120deg, transparent 30%, rgba(255, 255, 255, 0.4) 50%, transparent 70%);
    transition: left 0.8s;
    pointer-events: none;
}
.case-card:hover .case-shine { left: 100%; }

.case-info {
    padding: 24px 28px 28px;
}
.case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
}
.case-tags span {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--accent);
    padding: 3px 10px;
    background: rgba(124, 58, 237, 0.07);
    border: 1px solid rgba(124, 58, 237, 0.18);
    border-radius: 100px;
}
.case-info h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.3;
}
.case-info p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 16px;
}
.case-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    transition: gap 0.3s;
}
.case-link:hover { gap: 10px; }
.case-link.disabled {
    color: var(--text-muted);
    cursor: default;
}

/* ==========================================================================
   TECH
   ========================================================================== */
.tech-body {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(360px, 0.85fr);
    gap: 32px;
    align-items: stretch;
}
.tech-cta {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 28px;
    min-height: 100%;
    padding: 32px 36px;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.06), rgba(0, 240, 255, 0.03));
    border: 1px solid rgba(124, 58, 237, 0.2);
    border-radius: var(--radius);
}
.tech-cta-text { max-width: 520px; }
.tech-cta-text h3 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}
.tech-cta-text p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* === 技术栈词云 === */
.tech-cloud {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 24px;
    background:
        radial-gradient(ellipse at center, rgba(124, 58, 237, 0.05), transparent 70%),
        linear-gradient(180deg, #0f1424, #0a0e1a);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    position: relative;
    overflow: hidden;
}
.tech-cloud::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(124, 58, 237, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.04) 1px, transparent 1px);
    background-size: 44px 44px;
    pointer-events: none;
}
.tech-cloud-img {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    position: relative;
    z-index: 1;
}

/* ==========================================================================
   PROCESS
   ========================================================================== */
.section.process {
    padding-top: 58px;
    padding-bottom: 64px;
}
.section.process .section-head {
    margin-bottom: 38px;
}
.process-grid {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    gap: 12px;
    align-items: center;
}
.process-step {
    text-align: center;
    padding: 24px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all 0.3s;
    box-shadow: var(--shadow-sm);
}
.process-step:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
}
.step-num {
    display: block;
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 900;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 12px;
    line-height: 1;
}
.process-step h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.process-step p {
    font-size: 12px;
    line-height: 1.6;
    color: var(--text-secondary);
}
.process-arrow {
    text-align: center;
    font-size: 24px;
    color: var(--accent);
    font-family: var(--font-display);
}

/* ==========================================================================
   FAQ
   ========================================================================== */
.faq-container { max-width: 880px; margin: 0 auto; }
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.3s;
    box-shadow: var(--shadow-sm);
}
.faq-item[open],
.faq-item:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md);
}
.faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 28px;
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    list-style: none;
    user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-icon {
    position: relative;
    width: 20px; height: 20px;
    flex-shrink: 0;
    margin-left: 16px;
}
.faq-icon::before, .faq-icon::after {
    content: '';
    position: absolute;
    background: var(--accent);
    border-radius: 1px;
    transition: all 0.3s;
}
.faq-icon::before {
    top: 50%; left: 0;
    width: 20px; height: 2px;
    transform: translateY(-50%);
}
.faq-icon::after {
    left: 50%; top: 0;
    width: 2px; height: 20px;
    transform: translateX(-50%);
}
.faq-item[open] .faq-icon::after {
    transform: translateX(-50%) rotate(90deg);
    opacity: 0;
}
.faq-body {
    padding: 0 28px 24px;
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-secondary);
}
.faq-body p strong {
    color: var(--accent);
    font-weight: 600;
}

/* ==========================================================================
   CONTACT
   ========================================================================== */
.contact-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info { padding-right: 20px; }
.contact-info .section-eyebrow,
.contact-info .section-title,
.contact-info .section-desc { text-align: left; margin-left: 0; }

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: 40px 0;
}
.contact-row {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all 0.3s;
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}
.contact-row:hover {
    border-color: var(--accent);
    transform: translateX(4px);
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.06), #0f1424);
    box-shadow: var(--shadow-md);
}
.contact-ic {
    width: 48px; height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.12), rgba(0, 240, 255, 0.08));
    border: 1px solid rgba(124, 58, 237, 0.2);
    border-radius: 12px;
    color: var(--accent);
    flex-shrink: 0;
}
.contact-ic svg { width: 22px; height: 22px; }
.contact-row > div:last-child { display: flex; flex-direction: column; gap: 4px; }
.contact-lbl {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}
.contact-val {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.qr-block {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}
.qr {
    width: 100px; height: 100px;
    background: var(--bg-card);
    border-radius: 12px;
    padding: 8px;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border);
}
.qr-pattern {
    width: 100%; height: 100%;
    background-image:
        linear-gradient(45deg, #000 25%, transparent 25%),
        linear-gradient(-45deg, #000 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #000 75%),
        linear-gradient(-45deg, transparent 75%, #000 75%);
    background-size: 8px 8px;
    background-position: 0 0, 0 4px, 4px -4px, -4px 0;
}
.qr-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 6px;
    display: block;
    image-rendering: pixelated;
}
.qr-text { display: flex; flex-direction: column; gap: 4px; }
.qr-text strong {
    font-size: 16px;
    color: var(--text-primary);
}
.qr-text span {
    font-size: 13px;
    color: var(--text-secondary);
}

/* Form */
.contact-form {
    padding: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    align-self: end;
    text-align: left;
}
.form-head { margin-bottom: 28px; }
.form-head h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.form-head p {
    font-size: 14px;
    color: var(--text-secondary);
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}
.form-field { display: flex; flex-direction: column; margin-bottom: 16px; }
.form-row .form-field { margin-bottom: 0; }
.form-field label {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}
.form-field input,
.form-field select,
.form-field textarea {
    padding: 14px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 14px;
    color: var(--text-primary);
    transition: all 0.3s;
    font-family: inherit;
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    border-color: var(--accent);
    background: var(--bg-card);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.12);
}
.form-field select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234a5468' stroke-width='2'%3e%3cpath d='M6 9l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 14px center;
    background-size: 18px;
    padding-right: 40px;
}
.form-field textarea { resize: vertical; min-height: 100px; }
.contact-form .btn { margin-top: 12px; }
.form-feedback {
    margin-top: 14px;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    line-height: 1.6;
    border: 1px solid transparent;
    animation: feedback-in 0.35s ease;
}
.form-feedback[hidden] { display: none; }
.form-feedback.ok {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.3);
    color: #047857;
}
.form-feedback.err {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: #b91c1c;
}
.form-feedback.warn {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.3);
    color: #b45309;
}
@keyframes feedback-in {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}
.form-tip {
    margin-top: 12px;
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
}

/* ==========================================================================
   FLOATING CONTACT (微信 / QQ)
   ========================================================================== */
.float-actions {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 900;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 14px;
}
.float-item { position: relative; }

.float-btn {
    position: relative;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: transform .3s, box-shadow .3s, border-color .3s;
}
.float-btn:hover { transform: translateY(-3px) scale(1.06); }
.float-btn svg { width: 28px; height: 28px; }
.float-wechat { color: #07C160; border-color: rgba(7, 193, 96, 0.4); }
.float-wechat:hover { border-color: #07C160; box-shadow: 0 12px 34px rgba(7, 193, 96, 0.3); }
.float-qq { color: #12B7F5; border-color: rgba(18, 183, 245, 0.4); }
.float-qq:hover { border-color: #12B7F5; box-shadow: 0 12px 34px rgba(18, 183, 245, 0.3); }
.float-qq-text {
    font-family: var(--font-mono);
    font-size: 18px;
    font-weight: 800;
    letter-spacing: 0.02em;
}

/* 在线状态脉冲点 */
.float-online {
    position: absolute;
    top: 1px;
    right: 1px;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    border: 2px solid var(--accent-2);
}
.float-online-wechat { background: #07C160; animation: online-pulse-wechat 2s infinite; }
.float-online-qq { background: #12B7F5; animation: online-pulse-qq 2s infinite; }
@keyframes online-pulse-wechat {
    0% { box-shadow: 0 0 0 0 rgba(7, 193, 96, 0.55); }
    70% { box-shadow: 0 0 0 8px rgba(7, 193, 96, 0); }
    100% { box-shadow: 0 0 0 0 rgba(7, 193, 96, 0); }
}
@keyframes online-pulse-qq {
    0% { box-shadow: 0 0 0 0 rgba(18, 183, 245, 0.55); }
    70% { box-shadow: 0 0 0 8px rgba(18, 183, 245, 0); }
    100% { box-shadow: 0 0 0 0 rgba(18, 183, 245, 0); }
}

/* 弹出卡片 */
.float-pop {
    position: absolute;
    right: 68px;
    bottom: 0;
    width: 240px;
    padding: 18px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateX(14px);
    transition: all .3s ease;
    text-align: left;
}
.float-pop.float-pop-qr { width: 260px; }

.float-qr-wrap {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 10px 10px 8px;
    margin-bottom: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    box-shadow: 0 0 0 1px rgba(7, 193, 96, 0.35), 0 6px 22px rgba(7, 193, 96, 0.16);
}
.float-qr-img {
    width: 100%;
    max-width: 200px;
    height: auto;
    display: block;
    image-rendering: pixelated;
    border-radius: 4px;
}
.float-qr-tip {
    font-size: 11px;
    color: #666;
    letter-spacing: 0.05em;
}
.float-item.active .float-pop { opacity: 1; visibility: visible; transform: translateX(0); }
.float-pop-title { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.float-pop-ic {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}
.float-wechat-ic { background: #07C160; }
.float-qq-ic { background: #12B7F5; }
.float-pop-title strong { display: block; font-size: 14px; color: var(--text-primary); }
.float-pop-title span { font-size: 12px; color: var(--text-muted); }
.float-copy {
    display: block;
    width: 100%;
    text-align: center;
    padding: 10px 14px;
    margin-top: 8px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all .25s;
}
.float-copy:hover { border-color: var(--accent); background: rgba(124, 58, 237, 0.06); }
.float-copy.copied { border-color: var(--accent-4); color: #047857; }
.float-copy-ghost { background: transparent; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
    position: relative;
    z-index: 1;
    padding: 64px 0 24px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
}
.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid var(--border);
}
.footer-brand p {
    margin: 20px 0 24px;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.7;
    max-width: 320px;
}
.footer-sub {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 18px;
    padding: 12px 18px;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.08), rgba(0, 240, 255, 0.04));
    border: 1px solid rgba(124, 58, 237, 0.2);
    border-radius: 100px;
    transition: all 0.3s;
    max-width: 360px;
}
.footer-sub:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(124, 58, 237, 0.16);
}
.footer-sub-label {
    font-family: var(--font-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent);
    padding: 3px 8px;
    background: rgba(124, 58, 237, 0.1);
    border-radius: 100px;
    flex-shrink: 0;
}
.footer-sub-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}
.footer-social {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.footer-social a {
    padding: 6px 14px;
    font-size: 12px;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 100px;
    transition: all 0.3s;
}
.footer-social a:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 14px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}
.footer-col a {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    transition: color 0.3s;
}
.footer-col a:hover { color: var(--accent); }

.footer-bottom {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    padding-top: 30px;
    font-size: 12px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}
.footer-bottom a {
    color: inherit;
    text-decoration: none;
    border-bottom: 1px dashed var(--border-strong);
    transition: color .3s, border-color .3s;
}
.footer-bottom a:hover {
    color: var(--accent);
    border-color: var(--accent);
}

/* ==========================================================================
   PRELOADER
   ========================================================================== */
.preloader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s, visibility 0.6s;
}
.preloader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
.preloader-inner {
    text-align: center;
}
.preloader-logo {
    font-family: var(--font-display);
    font-size: 48px;
    font-weight: 900;
    letter-spacing: 0.1em;
    margin-bottom: 18px;
}
.preloader-logo .logo-y,
.preloader-logo .logo-u,
.preloader-logo .logo-n,
.preloader-logo .logo-s,
.preloader-logo .logo-h,
.preloader-logo .logo-u2 {
    display: inline-block;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: logo-pulse 1.5s ease-in-out infinite;
}
.preloader-logo .logo-y { animation-delay: 0s; }
.preloader-logo .logo-u { animation-delay: 0.1s; }
.preloader-logo .logo-n { animation-delay: 0.2s; }
.preloader-logo .logo-s { animation-delay: 0.3s; }
.preloader-logo .logo-h { animation-delay: 0.4s; }
.preloader-logo .logo-u2 { animation-delay: 0.5s; }
@keyframes logo-pulse {
    0%, 100% { opacity: 0.3; transform: translateY(0); }
    50% { opacity: 1; transform: translateY(-4px); }
}
.preloader-bar {
    width: 240px; height: 2px;
    background: var(--gradient-1);
    border-radius: 1px;
    overflow: hidden;
    margin: 0 auto 20px;
}
.preloader-bar span {
    display: block;
    height: 100%;
    width: 0;
    background: var(--gradient-1);
    animation: preloader-fill 2s ease-out forwards;
}
@keyframes preloader-fill {
    to { width: 100%; }
}
.preloader-text {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 0.2em;
}
.dots {
    display: inline-block;
    width: 24px;
    text-align: left;
    animation: dots-anim 1.5s steps(4) infinite;
}
@keyframes dots-anim {
    0% { content: ''; }
    25% { content: '.'; }
    50% { content: '..'; }
    75% { content: '...'; }
}