/* ========== Reset ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: #0f172a;
    background: #fafbff;
    line-height: 1.6;
    overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul { list-style: none; }
code { font-family: 'JetBrains Mono', monospace; font-size: 0.9em; }
em { font-style: normal; }

:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #818cf8;
    --purple: #7c3aed;
    --accent: #f59e0b;
    --bg: #fafbff;
    --bg-soft: #f5f6fc;
    --surface: #ffffff;
    --text: #0f172a;
    --text-2: #475569;
    --text-3: #94a3b8;
    --border: #e2e8f0;
    --border-soft: #eef2f7;
    --grad-1: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
    --grad-2: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    --grad-3: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --grad-soft: linear-gradient(135deg, rgba(99,102,241,0.08), rgba(139,92,246,0.08));
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
    --shadow-lg: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(15, 23, 42, 0.15);
    --shadow-glow: 0 20px 60px -10px rgba(99, 102, 241, 0.25);
    --radius-sm: 10px;
    --radius: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-2xl: 36px;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
}
.gradient-text {
    background: var(--grad-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========== Navbar ========== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    transition: all 0.3s ease;
    background: rgba(250, 251, 255, 0.7);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid transparent;
}
.navbar.scrolled {
    background: rgba(255, 255, 255, 0.88);
    border-bottom: 1px solid var(--border-soft);
    box-shadow: 0 4px 30px rgba(15, 23, 42, 0.04);
}
.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    color: var(--text);
}
.logo-mark {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.logo-mark svg { width: 100%; height: 100%; }
.logo-text {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    font-size: 21px;
    letter-spacing: -0.01em;
    font-weight: 700;
}
.logo-sub {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 10px;
    color: var(--text-3);
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    padding-top: 3px;
}
.nav-menu {
    display: flex;
    gap: 4px;
    align-items: center;
}
.nav-menu a {
    padding: 8px 14px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-2);
    border-radius: 8px;
    transition: all 0.2s;
    letter-spacing: 0.02em;
}
.nav-menu a:hover {
    color: var(--primary);
    background: rgba(99, 102, 241, 0.06);
}
.nav-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}
.nav-link {
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-2);
    border-radius: 8px;
    transition: all 0.2s;
}
.nav-link:hover { color: var(--primary); background: rgba(99,102,241,0.06); }
.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 11px 22px;
    background: var(--grad-2);
    color: #fff !important;
    border-radius: 12px;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.25s;
    box-shadow: 0 6px 16px rgba(79, 70, 229, 0.3);
}
.nav-cta svg { width: 14px; height: 14px; }
.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 24px rgba(79, 70, 229, 0.4);
}
.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
}
.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.25s;
}

/* ========== Nav Dropdown ========== */
.nav-dropdown-wrap {
    position: relative;
}
.nav-dropdown-trigger svg {
    width: 12px;
    height: 12px;
    transition: transform 0.25s;
    margin-left: 2px;
}
.nav-dropdown-wrap.open .nav-dropdown-trigger svg {
    transform: rotate(180deg);
}
.nav-dropdown {
    position: absolute;
    top: calc(100% + 16px);
    right: 0;
    min-width: 280px;
    background: #fff;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 50px -10px rgba(15,23,42,0.15), 0 0 0 1px rgba(99,102,241,0.05);
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.25s, transform 0.25s, visibility 0.25s;
    z-index: 200;
}
.nav-dropdown-wrap.open .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.nav-dropdown::before {
    content: '';
    position: absolute;
    top: -6px;
    right: 24px;
    width: 12px;
    height: 12px;
    background: #fff;
    border-top: 1px solid var(--border-soft);
    border-left: 1px solid var(--border-soft);
    transform: rotate(45deg);
}

/* Articles Mega Menu */
.nav-dropdown-mega {
    min-width: 640px;
    padding: 28px;
}
.nav-mega-grid {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 28px;
}
.nav-mega-side {
    border-right: 1px solid var(--border-soft);
    padding-right: 20px;
}
.nav-mega-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text-3);
    letter-spacing: 0.16em;
    margin-bottom: 16px;
    font-weight: 600;
}
.nav-mega-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.nav-mega-list li a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px;
    border-radius: 10px;
    transition: all 0.2s;
}
.nav-mega-list li a:hover {
    background: var(--bg-soft);
}
.nav-mega-num {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    width: 26px;
    height: 26px;
    border-radius: 6px;
    background: rgba(99,102,241,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.nav-mega-list li strong {
    display: block;
    font-size: 13.5px;
    color: var(--text);
    font-weight: 700;
    margin-bottom: 1px;
}
.nav-mega-list li em {
    font-style: normal;
    font-size: 11.5px;
    color: var(--text-3);
}
.nav-mega-main {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.nav-mega-articles {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.nav-mega-article {
    display: block;
    padding: 12px 14px;
    border-radius: 10px;
    transition: all 0.2s;
    border: 1px solid transparent;
}
.nav-mega-article:hover {
    background: var(--bg-soft);
    border-color: rgba(99,102,241,0.15);
}
.nav-mega-article-tag {
    display: inline-block;
    font-size: 10.5px;
    font-weight: 700;
    color: var(--primary);
    background: rgba(99,102,241,0.1);
    padding: 3px 9px;
    border-radius: 100px;
    margin-bottom: 6px;
}
.nav-mega-article h5 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
    line-height: 1.4;
}
.nav-mega-article-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11.5px;
    color: var(--text-3);
}
.nav-mega-article-meta .dot { opacity: 0.5; }
.nav-mega-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 8px;
    padding: 8px 12px;
    background: var(--text);
    color: #fff;
    border-radius: 100px;
    font-size: 12.5px;
    font-weight: 600;
    align-self: flex-start;
    transition: all 0.2s;
}
.nav-mega-more:hover {
    background: var(--primary);
}
.nav-mega-more svg { width: 14px; height: 14px; }

/* Contact Dropdown */
.nav-dropdown-contact {
    min-width: 360px;
    padding: 24px;
    display: grid;
    grid-template-columns: 130px 1fr;
    gap: 20px;
    align-items: stretch;
}
.nav-contact-qr {
    width: 130px;
    height: 130px;
    padding: 6px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
}
.nav-contact-qr img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}
.nav-contact-info {
    display: flex;
    flex-direction: column;
}
.nav-contact-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
    letter-spacing: -0.01em;
}
.nav-contact-desc {
    font-size: 12px;
    color: var(--text-3);
    margin-bottom: 14px;
}
.nav-contact-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 14px;
}
.nav-contact-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12.5px;
    color: var(--text-2);
}
.nc-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--primary);
    flex-shrink: 0;
}
.nav-contact-list strong {
    color: var(--text);
    font-weight: 700;
    font-size: 12.5px;
}
.nav-contact-list em {
    color: var(--text-3);
    font-style: normal;
    font-size: 11.5px;
    margin-left: auto;
}
.nav-contact-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 16px;
    background: var(--grad-2);
    color: #fff;
    border-radius: 10px;
    font-size: 12.5px;
    font-weight: 600;
    transition: all 0.2s;
    box-shadow: 0 4px 10px rgba(79,70,229,0.2);
    margin-top: auto;
}
.nav-contact-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 14px rgba(79,70,229,0.3);
}
.nav-contact-btn svg { width: 14px; height: 14px; }

@media (max-width: 768px) {
    .nav-dropdown-mega { min-width: 90vw; }
    .nav-mega-grid { grid-template-columns: 1fr; gap: 20px; }
    .nav-mega-side { border-right: none; padding-right: 0; padding-bottom: 16px; border-bottom: 1px solid var(--border-soft); }
    .nav-dropdown-contact { grid-template-columns: 1fr; min-width: 280px; }
    .nav-contact-qr { margin: 0 auto; }
}

/* ========== HERO ========== */
.hero {
    position: relative;
    padding: 160px 48px 0;
    overflow: hidden;
    background: linear-gradient(180deg, #f5f6fc 0%, #fafbff 100%);
    min-height: 100vh;
}
.hero-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}
.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 0;
}
.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.55;
    animation: orb-float 20s ease-in-out infinite;
}
.hero-orb-1 {
    width: 600px; height: 600px;
    background: radial-gradient(circle, #c7d2fe 0%, transparent 70%);
    top: -150px; left: -150px;
}
.hero-orb-2 {
    width: 520px; height: 520px;
    background: radial-gradient(circle, #ddd6fe 0%, transparent 70%);
    top: 80px; right: -120px;
    animation-delay: 5s;
}
.hero-orb-3 {
    width: 480px; height: 480px;
    background: radial-gradient(circle, #fbcfe8 0%, transparent 70%);
    bottom: -120px; left: 40%;
    animation-delay: 10s;
}
@keyframes orb-float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(40px, -40px) scale(1.05); }
    66% { transform: translate(-30px, 30px) scale(0.95); }
}
.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(99,102,241,0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99,102,241,0.06) 1px, transparent 1px);
    background-size: 80px 80px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 80%);
}
.hero-noise {
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 200'><filter id='n'><feTurbulence baseFrequency='0.9' numOctaves='3'/></filter><rect width='200' height='200' filter='url(%23n)' opacity='0.5'/></svg>");
    opacity: 0.04;
}

/* 背景大字装饰 */
.hero-bg-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(180px, 22vw, 360px);
    font-weight: 700;
    letter-spacing: -0.06em;
    color: rgba(99, 102, 241, 0.04);
    pointer-events: none;
    z-index: 0;
    white-space: nowrap;
    user-select: none;
}
.hero-bg-text-2 {
    position: absolute;
    top: 20%;
    right: -2%;
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(80px, 8vw, 140px);
    font-weight: 700;
    letter-spacing: 0.04em;
    color: rgba(139, 92, 246, 0.06);
    pointer-events: none;
    z-index: 0;
    transform: rotate(-90deg);
    transform-origin: top right;
    white-space: nowrap;
    user-select: none;
}

.hero-container {
    max-width: 1180px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}
.hero-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 60px;
    opacity: 0;
    animation: fade-up 1s 0.3s forwards;
}
.hero-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    color: var(--text-3);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.08em;
}
.hero-meta-line {
    width: 50px;
    height: 1px;
    background: var(--text-3);
}
.hero-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: rgba(255,255,255,0.7);
    border: 1px solid var(--border-soft);
    border-radius: 100px;
    font-size: 13px;
    color: var(--text-2);
    backdrop-filter: blur(8px);
}
.status-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: #10b981;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2); }
    50% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0.05); }
}

.hero-title {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    font-size: clamp(44px, 7.2vw, 112px);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.05;
    margin-bottom: 56px;
    color: #0f172a;
}
.hero-line {
    display: block;
    opacity: 0;
    transform: translateY(60px);
    animation: hero-line-in 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.hero-line:nth-child(1) { animation-delay: 0.4s; }
.hero-line:nth-child(2) { animation-delay: 0.6s; }
@keyframes hero-line-in {
    to { opacity: 1; transform: translateY(0); }
}
.hero-line em {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    background: var(--grad-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.hero-bottom {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: end;
    padding-bottom: 56px;
    border-top: 1px solid var(--border);
    padding-top: 32px;
    opacity: 0;
    animation: fade-up 1s 0.9s forwards;
}
@keyframes fade-up {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-subtitle p {
    font-size: 18px;
    color: var(--text-2);
    line-height: 1.6;
    margin-bottom: 8px;
}
.hero-subtitle em {
    color: var(--text);
    font-weight: 600;
    font-size: 19px;
}

/* 打字机效果 */
.hero-sub-typing,
.hero-sub-typing-2 {
    font-size: 19px;
    line-height: 1.7;
    margin-bottom: 8px;
    min-height: 32px;
    color: var(--text-2);
}
.hero-sub-typing-2 {
    margin-top: 12px;
}
.hero-sub-typing .tk-cursor,
.hero-sub-typing-2 .tk-cursor {
    display: inline-block;
    width: 2px;
    height: 1.1em;
    background: var(--primary);
    margin-left: 2px;
    vertical-align: text-bottom;
    animation: tk-blink 0.8s steps(1) infinite;
}
@keyframes tk-blink {
    50% { opacity: 0; }
}
.tk-keyword {
    font-weight: 700;
    padding: 0 2px;
    border-radius: 3px;
    position: relative;
    transition: all 0.2s;
}
.tk-keyword.tk-1 {
    color: #4f46e5;
    background: linear-gradient(180deg, transparent 60%, rgba(79,70,229,0.15) 60%);
}
.tk-keyword.tk-2 {
    color: #7c3aed;
    background: linear-gradient(180deg, transparent 60%, rgba(124,58,237,0.15) 60%);
}
.tk-keyword.tk-3 {
    color: #ec4899;
    background: linear-gradient(180deg, transparent 60%, rgba(236,72,153,0.15) 60%);
}
.tk-keyword.tk-4 {
    color: #06b6d4;
    background: linear-gradient(180deg, transparent 60%, rgba(6,182,212,0.15) 60%);
}
.tk-keyword.tk-5 {
    color: #f59e0b;
    background: linear-gradient(180deg, transparent 60%, rgba(245,158,11,0.15) 60%);
}
.tk-keyword.tk-em {
    color: var(--text);
    background: none;
    padding: 0;
    font-weight: 600;
    font-size: 1.1em;
}
.tk-bracket {
    color: var(--text-3);
    font-weight: 500;
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: flex-end;
}
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 18px 32px;
    background: var(--grad-2);
    color: #fff !important;
    border-radius: 14px;
    font-weight: 600;
    font-size: 15.5px;
    transition: all 0.25s;
    box-shadow: 0 10px 30px -8px rgba(79, 70, 229, 0.5);
}
.btn-primary svg { width: 18px; height: 18px; }
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 40px -8px rgba(79, 70, 229, 0.6);
}
.btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 18px 32px;
    background: rgba(255, 255, 255, 0.85);
    color: var(--text) !important;
    border: 1px solid var(--border);
    border-radius: 14px;
    font-weight: 600;
    font-size: 15.5px;
    backdrop-filter: blur(8px);
    transition: all 0.25s;
}
.btn-ghost svg { width: 18px; height: 18px; }
.btn-ghost:hover {
    background: #fff;
    border-color: var(--primary-light);
    color: var(--primary) !important;
    transform: translateY(-2px);
}
.btn-wechat {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 18px 32px;
    background: #fff;
    color: var(--primary) !important;
    border: 1.5px solid var(--primary-light);
    border-radius: 14px;
    font-weight: 700;
    font-size: 15.5px;
    transition: all 0.25s;
    box-shadow: 0 10px 26px -12px rgba(79, 70, 229, 0.4);
}
.btn-wechat svg { width: 18px; height: 18px; }
.btn-wechat:hover {
    background: var(--grad-2);
    color: #fff !important;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 14px 32px -12px rgba(79, 70, 229, 0.55);
}
.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 18px 32px;
    background: transparent;
    color: var(--text) !important;
    border: 1px solid var(--text);
    border-radius: 14px;
    font-weight: 600;
    font-size: 15.5px;
    transition: all 0.25s;
}
.btn-outline svg { width: 18px; height: 18px; }
.btn-outline:hover {
    background: var(--text);
    color: #fff !important;
    transform: translateY(-2px);
}

/* Data Strip 数据条 */
.data-strip {
    position: relative;
    border-top: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    z-index: 3;
}
.data-strip-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 32px;
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 0;
}
.data-strip-cell {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 0 20px;
    border-right: 1px solid var(--border);
}
.data-strip-cell:last-child { border-right: none; }
.data-num {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 36px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
    line-height: 1;
    display: inline-flex;
    align-items: baseline;
    gap: 2px;
}
.data-num em {
    font-size: 14px;
    color: var(--primary);
    font-weight: 600;
    font-style: normal;
}
.data-label {
    font-size: 12px;
    color: var(--text-3);
    font-weight: 500;
    letter-spacing: 0.04em;
}

/* ========== Chapter 章节通用 ========== */
.chapter {
    padding: 140px 32px;
    position: relative;
}
.chapter-head {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
}
.chapter-head-center { justify-content: center; }
.chapter-num {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 0.04em;
    background: rgba(99,102,241,0.1);
    padding: 8px 14px;
    border-radius: 100px;
}
.chapter-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--text-3);
    letter-spacing: 0.16em;
    font-weight: 500;
}
.chapter-title {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    font-size: clamp(36px, 5.6vw, 80px);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.08;
    margin-bottom: 60px;
    color: var(--text);
}
/* 章节标题渐变线：进入视口时展开（配合 .fade-in.visible） */
.chapter-title::after {
    content: '';
    display: block;
    width: 72px;
    height: 4px;
    border-radius: 100px;
    background: var(--grad-1);
    margin-top: 26px;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.9s cubic-bezier(0.16, 1, 0.3, 1) 0.25s;
}
.chapter-title.visible::after { transform: scaleX(1); }
.chapter-title-center::after { margin-left: auto; margin-right: auto; }
.chapter-title-center { text-align: center; }
.chapter-lead {
    text-align: center;
    font-size: 18px;
    color: var(--text-2);
    max-width: 600px;
    margin: -32px auto 60px;
    line-height: 1.6;
}

/* ========== Chapter 01 介绍 ========== */
.chapter-intro {
    background: #fff;
}
.chapter-intro .chapter-title { max-width: 800px; }
.chapter-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 80px;
    align-items: start;
}
.chapter-text .lead {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    font-size: 34px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text);
    margin-bottom: 28px;
    letter-spacing: -0.02em;
}
.lead-line { display: block; }
.lead-line em {
    background: var(--grad-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.chapter-text p {
    font-size: 16px;
    color: var(--text-2);
    line-height: 1.8;
    margin-bottom: 16px;
}
.chapter-text em {
    font-style: normal;
    font-weight: 700;
    color: var(--primary);
    background: linear-gradient(transparent 68%, rgba(99,102,241,0.14) 68%);
    padding: 0 1px;
    border-radius: 2px;
}
.chapter-feature {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.feature-card-x {
    padding: 32px 28px;
    background: var(--bg-soft);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-soft);
    transition: all 0.3s;
}
.feature-card-x:hover {
    background: #fff;
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(99,102,241,0.2);
}
.feature-num {
    display: block;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 44px;
    font-weight: 700;
    background: var(--grad-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}
.feature-name {
    font-size: 14px;
    color: var(--text-2);
    font-weight: 500;
    letter-spacing: 0.02em;
}

/* ========== Chapter 02 数据 ========== */
.chapter-data {
    background: linear-gradient(180deg, #fafbff 0%, #f5f6fc 100%);
}
.dashboard-x {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 80px;
}
.dash-x {
    background: #fff;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}
.dash-x::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--grad-1);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s;
}
.dash-x:hover::before { transform: scaleX(1); }
.dash-x:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.dash-x-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}
.dash-x-label {
    font-size: 13px;
    color: var(--text-3);
    font-weight: 600;
    letter-spacing: 0.04em;
}
.dash-x-live {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    font-weight: 700;
    border-radius: 100px;
}
.live-dot {
    width: 5px; height: 5px;
    border-radius: 50%;
    background: #10b981;
    animation: pulse 1.5s ease-in-out infinite;
}
.dash-x-num {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(28px, 3.6vw, 44px);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
    line-height: 1.1;
    margin-bottom: 16px;
}
.dash-x-chart {
    height: 80px;
    margin-bottom: 12px;
}
.dash-x-chart svg { width: 100%; height: 100%; }
.dash-x-foot {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 14px;
    border-top: 1px solid var(--border-soft);
    font-size: 12px;
    color: var(--text-3);
}
.trend.up {
    color: #059669;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
}

/* Logo 墙 */
.logos-wall {
    padding: 50px 32px;
    background: #fff;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-soft);
}
.logos-wall-label {
    text-align: center;
    color: var(--text-3);
    font-size: 13px;
    margin-bottom: 32px;
    letter-spacing: 0.04em;
    font-weight: 500;
}
.logos-marquee {
    overflow: hidden;
    mask-image: linear-gradient(to right, transparent, #000 10%, #000 90%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, #000 10%, #000 90%, transparent);
    display: flex;
    gap: 50px;
}
.logos-track {
    display: flex;
    gap: 50px;
    flex-shrink: 0;
    animation: marquee 40s linear infinite;
}
.logos-track:nth-child(2) { animation-direction: reverse; }
@keyframes marquee {
    from { transform: translateX(0); }
    to { transform: translateX(-100%); }
}
.logo-item {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    font-size: 22px;
    font-weight: 700;
    color: var(--text-2);
    white-space: nowrap;
    opacity: 0.55;
    transition: opacity 0.3s;
}
.logo-item:hover { opacity: 1; color: var(--primary); }

/* ========== Chapter 03 引擎 ========== */
.chapter-engine {
    background: #fff;
}
.engine-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}
.engine-card {
    background: linear-gradient(135deg, #fafbff 0%, #f5f6fc 100%);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-xl);
    padding: 50px;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}
.engine-card:hover {
    box-shadow: var(--shadow-xl);
    border-color: rgba(99,102,241,0.2);
}
.engine-card-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px dashed var(--border);
}
.engine-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--primary);
    letter-spacing: 0.16em;
    font-weight: 600;
}
.engine-status {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text-3);
    letter-spacing: 0.08em;
}
.engine-title {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    font-size: clamp(28px, 3.2vw, 40px);
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text);
    letter-spacing: -0.02em;
    line-height: 1.15;
}
.engine-desc {
    font-size: 15.5px;
    color: var(--text-2);
    line-height: 1.75;
    margin-bottom: 32px;
}
.engine-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 24px;
    padding: 6px;
    background: rgba(255,255,255,0.7);
    border: 1px solid var(--border-soft);
    border-radius: 100px;
    width: fit-content;
}
.engine-tab {
    padding: 8px 18px;
    font-size: 13.5px;
    font-weight: 600;
    color: var(--text-2);
    border-radius: 100px;
    transition: all 0.2s;
}
.engine-tab.active {
    background: var(--grad-2);
    color: #fff;
    box-shadow: 0 4px 10px rgba(79, 70, 229, 0.25);
}
.engine-chat {
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding: 28px;
    background: #f5f6fc;
    border-radius: var(--radius);
    border: 1px solid var(--border-soft);
    margin-bottom: 24px;
    min-height: 200px;
}
.engine-chat.hidden { display: none; }
.chat-bubble {
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 14.5px;
    line-height: 1.55;
    max-width: 85%;
    animation: bubble-in 0.5s ease-out backwards;
    word-break: break-word;
    position: relative;
}
.chat-bubble:nth-child(1) { animation-delay: 0.05s; }
.chat-bubble:nth-child(2) { animation-delay: 0.15s; }
.chat-bubble:nth-child(3) { animation-delay: 0.25s; }
.chat-q {
    align-self: flex-start;
    background: #fff;
    color: var(--text);
    border: 1px solid var(--border);
    box-shadow: 0 1px 2px rgba(15,23,42,0.04);
    display: flex;
    align-items: flex-start;
    gap: 10px;
}
.chat-q::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 14px;
    width: 10px;
    height: 10px;
    background: #fff;
    border-left: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    transform: rotate(45deg);
}
.chat-avatar-mini {
    width: 28px;
    height: 28px;
    border-radius: 4px;
    background: linear-gradient(135deg, #94a3b8, #64748b);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 12px;
    flex-shrink: 0;
}
.chat-a {
    align-self: flex-end;
    background: var(--grad-2);
    color: #fff;
    box-shadow: 0 8px 18px -8px rgba(79, 70, 229, 0.5);
}
.chat-a::before {
    content: '';
    position: absolute;
    right: -6px;
    top: 14px;
    width: 10px;
    height: 10px;
    background: #6d28d9;
    transform: rotate(45deg);
}
.bubble-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 10.5px;
    font-weight: 700;
    color: #4338ca;
    letter-spacing: 0.04em;
    margin-bottom: 6px;
    padding: 2px 8px;
    background: rgba(255,255,255,0.92);
    border-radius: 100px;
}
@keyframes bubble-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.engine-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.engine-list li {
    position: relative;
    padding-left: 24px;
    font-size: 14.5px;
    color: var(--text-2);
    line-height: 1.6;
}
.engine-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 12px; height: 12px;
    border-radius: 3px;
    background: var(--grad-2);
}

/* RPA Stats */
.rpa-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 28px;
}
.rpa-stat-cell {
    text-align: center;
    padding: 24px 16px;
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--border-soft);
}
.rpa-stat-num {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 40px;
    font-weight: 700;
    background: var(--grad-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    letter-spacing: -0.02em;
}
.rpa-stat-num span {
    font-size: 0.4em;
    color: var(--text-3);
    -webkit-text-fill-color: var(--text-3);
    margin-left: 2px;
}
.rpa-stat-label {
    font-size: 12px;
    color: var(--text-3);
    margin-top: 8px;
    letter-spacing: 0.04em;
}

/* ========== Chapter 04 RPA 矩阵 ========== */
.chapter-rpa {
    background: linear-gradient(180deg, #fafbff 0%, #f5f6fc 100%);
}
.rpa-x-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.rpa-x {
    padding: 32px;
    background: #fff;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    transition: all 0.3s;
    position: relative;
}
.rpa-x::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 2px;
    background: var(--grad-1);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s;
}
.rpa-x:hover::after { transform: scaleX(1); }
.rpa-x:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.rpa-x-num {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 0.1em;
    margin-bottom: 14px;
}
.rpa-x h3 {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text);
    letter-spacing: -0.01em;
}
.rpa-x > p {
    font-size: 14.5px;
    color: var(--text-2);
    line-height: 1.65;
    margin-bottom: 24px;
}
.rpa-x-card {
    padding: 20px;
    background: var(--bg-soft);
    border-radius: var(--radius);
    border: 1px solid var(--border-soft);
}
.rpa-x-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    font-size: 12.5px;
}
.rpa-x-row > span:first-child {
    width: 70px;
    color: var(--text-2);
}
.prog {
    flex: 1;
    height: 6px;
    background: rgba(99,102,241,0.1);
    border-radius: 100px;
    overflow: hidden;
}
.prog-fill {
    height: 100%;
    background: var(--grad-2);
    border-radius: 100px;
    transition: width 1s ease-out;
}
.rpa-x-num-p {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    color: var(--primary);
    font-size: 12px;
    min-width: 36px;
    text-align: right;
}

.moment-x {
    background: #fff;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 16px;
}
.moment-x-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}
.moment-x-avatar {
    width: 36px; height: 36px;
    border-radius: 8px;
    background: var(--grad-2);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
}
.moment-x-name { font-weight: 700; font-size: 13px; color: var(--primary); }
.moment-x-time { font-size: 11px; color: var(--text-3); }
.moment-x-content { font-size: 13px; color: var(--text); line-height: 1.5; margin-bottom: 10px; }
.moment-x-image {
    height: 140px;
    border-radius: 10px;
    background:
        linear-gradient(135deg, rgba(99,102,241,0.2), rgba(139,92,246,0.2)),
        radial-gradient(circle at 30% 30%, #c7d2fe 0%, transparent 60%),
        #eef2ff;
    margin-bottom: 8px;
}
.moment-x-actions {
    display: flex;
    gap: 14px;
    font-size: 12px;
    color: var(--text-3);
    padding-top: 8px;
    border-top: 1px solid var(--border-soft);
}

.kv-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    font-size: 13px;
    color: var(--text-2);
    border-bottom: 1px dashed var(--border-soft);
}
.kv-row:last-of-type { border-bottom: none; }
.kv-row strong { color: var(--text); font-weight: 700; font-family: 'JetBrains Mono', monospace; }
.status {
    padding: 3px 10px;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 600;
}
.status-on { background: rgba(16, 185, 129, 0.1); color: #059669; }

.flow-x {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.flow-x-step {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    background: #fff;
    border-radius: 10px;
    border: 1px solid var(--border-soft);
}
.flow-x-step span { font-size: 18px; }
.flow-x-step em {
    font-style: normal;
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
}
.flow-x-arrow {
    text-align: center;
    color: var(--primary);
    font-size: 14px;
}

.timeline-row {
    display: flex;
    gap: 14px;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px dashed var(--border-soft);
    font-size: 13px;
}
.timeline-row:last-child { border-bottom: none; }
.timeline-row .time {
    color: var(--primary);
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    min-width: 46px;
}
.timeline-row .task { color: var(--text); }

.window-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    margin-bottom: 14px;
}
.mini-win {
    padding: 10px 6px;
    background: var(--bg-soft);
    border-radius: 8px;
    text-align: center;
    font-size: 11.5px;
    color: var(--text-2);
    font-weight: 600;
    border: 1px solid var(--border-soft);
}
.mini-win.active {
    background: linear-gradient(135deg, rgba(99,102,241,0.12), rgba(139,92,246,0.12));
    color: var(--primary);
    border-color: rgba(99,102,241,0.3);
}
.mini-win.add {
    background: transparent;
    border-style: dashed;
    color: var(--text-3);
    font-size: 16px;
}
.rpa-x-mini-stat {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    padding-top: 12px;
    border-top: 1px dashed var(--border-soft);
    text-align: center;
}
.rpa-x-mini-stat strong {
    display: block;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
}
.rpa-x-mini-stat span { font-size: 10px; color: var(--text-3); }

/* ========== Chapter 05 案例 ========== */
.chapter-cases {
    background: #fff;
}
.cases-x-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}
.case-x {
    padding: 36px;
    background: var(--bg-soft);
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
    transition: all 0.3s;
}
.case-x:hover {
    background: #fff;
    border-color: rgba(99,102,241,0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.case-x.case-x-large { grid-column: span 2; }
.case-x-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    color: var(--primary);
    background: rgba(99,102,241,0.08);
    padding: 5px 12px;
    border-radius: 100px;
    margin-bottom: 18px;
    letter-spacing: 0.04em;
}
.case-x h3 {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    font-size: 22px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}
.case-x > p {
    font-size: 14.5px;
    color: var(--text-2);
    line-height: 1.7;
    margin-bottom: 24px;
}
.case-x-stats {
    display: flex;
    gap: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border-soft);
}
.case-x-stats > div { flex: 1; }
.case-x-stats strong {
    display: block;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 30px;
    font-weight: 700;
    background: var(--grad-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    letter-spacing: -0.02em;
}
.case-x-stats strong em {
    font-size: 0.5em;
    color: var(--text-3);
    -webkit-text-fill-color: var(--text-3);
    margin-left: 2px;
    font-style: normal;
}
.case-x-stats span {
    display: block;
    font-size: 11.5px;
    color: var(--text-3);
    margin-top: 6px;
}

/* 客户证言 */
.testimonials-x {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}
.testi-x {
    padding: 36px;
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-soft);
    transition: all 0.3s;
}
.testi-x:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}
.testi-x-quote {
    font-family: 'DM Serif Display', serif;
    font-size: 64px;
    line-height: 0.5;
    color: var(--primary);
    opacity: 0.18;
    margin-bottom: 20px;
    height: 24px;
}
.testi-x p {
    font-size: 15px;
    color: var(--text);
    line-height: 1.7;
    margin-bottom: 24px;
}
.testi-x-author {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-top: 18px;
    border-top: 1px solid var(--border-soft);
}
.testi-x-avatar {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: var(--grad-2);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}
.testi-x-author strong { display: block; font-size: 14px; color: var(--text); }
.testi-x-author span { font-size: 12px; color: var(--text-3); }

/* 媒体 + 奖项 */
.media-x-wrap {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 24px;
}
.media-x-label,
.awards-x-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text-3);
    letter-spacing: 0.16em;
    font-weight: 500;
    margin-bottom: 20px;
}
.media-x,
.awards-x {
    padding: 32px;
    background: var(--bg-soft);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-soft);
}
.media-x-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.media-x-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--border-soft);
    transition: all 0.3s;
}
.media-x-item:hover {
    transform: translateX(4px);
    border-color: rgba(99,102,241,0.2);
}
.media-x-item span {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    font-size: 18px;
    font-weight: 800;
    color: var(--primary);
    min-width: 80px;
    letter-spacing: -0.01em;
}
.media-x-item em {
    font-style: normal;
    font-size: 14px;
    color: var(--text);
    font-weight: 500;
}
.awards-x-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.award-x {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px;
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--border-soft);
}
.award-x span { font-size: 24px; }
.award-x em {
    font-style: normal;
    font-size: 13px;
    color: var(--text);
    font-weight: 600;
    line-height: 1.4;
}

/* ========== Chapter 06 联系 ========== */
.chapter-contact {
    background: linear-gradient(180deg, #fafbff 0%, #f5f6fc 100%);
    padding-bottom: 120px;
}

.action-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 100px;
}
.action-card {
    position: relative;
    padding: 50px 40px;
    background: #fff;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-soft);
    text-align: left;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
    cursor: pointer;
}
.action-card-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    opacity: 0;
    transition: opacity 0.4s;
}
.action-download .action-card-bg { background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%); }
.action-video .action-card-bg { background: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%); }
.action-contact .action-card-bg { background: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%); }
.action-card:hover .action-card-bg { opacity: 1; }
.action-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}
.action-card:hover .action-card-cta svg { transform: translateX(4px); }
.action-card:hover .action-card-cta span { color: #fff; }
.action-card:hover .action-card-num,
.action-card:hover .action-card-label,
.action-card:hover .action-card h3,
.action-card:hover .action-card p,
.action-card:hover .action-card-cta { color: #fff; }
.action-card > * { position: relative; z-index: 1; transition: color 0.4s; }
.action-card-num {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 60px;
    font-weight: 700;
    color: var(--text);
    line-height: 1;
    margin-bottom: 20px;
    letter-spacing: -0.04em;
}
.action-card-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text-3);
    letter-spacing: 0.16em;
    font-weight: 600;
    margin-bottom: 12px;
}
.action-card h3 {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    font-size: 26px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}
.action-card p {
    font-size: 14px;
    color: var(--text-2);
    margin-bottom: 32px;
    line-height: 1.6;
}
.action-card-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
}
.action-card-cta svg { width: 18px; height: 18px; transition: transform 0.3s; }

/* 场景标签云 */
.scenes-x {
    text-align: center;
}
.scenes-x-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--text-3);
    letter-spacing: 0.16em;
    margin-bottom: 28px;
}
.scenes-x-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    max-width: 800px;
    margin: 0 auto;
}
.scene-tag {
    padding: 10px 20px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 14px;
    color: var(--text-2);
    font-weight: 500;
    transition: all 0.25s;
}
.scene-tag:hover {
    background: var(--grad-2);
    color: #fff;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(79,70,229,0.25);
}

/* ========== Footer ========== */
.footer {
    background: #0f172a;
    color: #fff;
    padding: 80px 32px 30px;
}
.footer-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
    padding-bottom: 50px;
    margin-bottom: 50px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-top .logo { color: #fff; }
.footer-slogan {
    font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 18px;
    color: rgba(255,255,255,0.75);
    font-weight: 500;
    letter-spacing: 0.01em;
    max-width: 520px;
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 60px;
}
.footer-col h5 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: rgba(255,255,255,0.5);
    letter-spacing: 0.16em;
    margin-bottom: 18px;
    font-weight: 600;
}
.footer-col ul { display: flex; flex-direction: column; gap: 12px; }
.footer-col a, .footer-col li, .footer-col button {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    transition: color 0.2s;
    text-align: left;
}
.footer-col a:hover, .footer-col button:hover { color: var(--primary-light); }
.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}
.footer-icp {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.footer-icp a {
    color: rgba(255,255,255,0.5);
    transition: color 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.footer-icp a:hover { color: var(--primary-light); }
.footer-icp img { width: 14px; height: 14px; display: inline-block; filter: brightness(1.5); }
.footer-icp .dot { opacity: 0.5; }

/* ========== Back Top ========== */
.back-top {
    position: fixed;
    right: 28px;
    bottom: 28px;
    width: 48px;
    height: 48px;
    background: var(--grad-2);
    color: #fff;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 12px 24px rgba(79, 70, 229, 0.35);
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
    transition: all 0.3s;
    z-index: 50;
}
.back-top svg { width: 22px; height: 22px; }
.back-top.show {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}
.back-top:hover { transform: translateY(-3px); }

/* ========== MODAL ========== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.modal.show { display: flex; }
.modal-mask {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    animation: mask-in 0.3s ease-out;
}
@keyframes mask-in {
    from { opacity: 0; }
    to { opacity: 1; }
}
.modal-dialog {
    position: relative;
    width: 100%;
    max-width: 480px;
    background: #fff;
    border-radius: var(--radius-2xl);
    padding: 50px 40px 40px;
    box-shadow: 0 40px 80px rgba(0,0,0,0.25);
    animation: dialog-in 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    max-height: 90vh;
    overflow-y: auto;
}
.modal-dialog-wide { max-width: 860px; }
@keyframes dialog-in {
    from { opacity: 0; transform: translateY(30px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    color: var(--text-2);
}
.modal-close:hover {
    background: var(--text);
    color: #fff;
    transform: rotate(90deg);
}
.modal-close svg { width: 16px; height: 16px; }
.modal-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--primary);
    letter-spacing: 0.16em;
    font-weight: 600;
    margin-bottom: 16px;
    padding: 6px 12px;
    background: rgba(99,102,241,0.08);
    border-radius: 100px;
    display: inline-block;
}
.modal-title {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    font-size: 28px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 10px;
    letter-spacing: -0.02em;
}
.modal-desc {
    font-size: 15px;
    color: var(--text-2);
    line-height: 1.6;
    margin-bottom: 28px;
}

/* Download Modal */
.download-info {
    background: var(--bg-soft);
    border-radius: var(--radius);
    padding: 8px 24px;
    margin-bottom: 24px;
}
.download-info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 0;
    border-bottom: 1px dashed var(--border);
    font-size: 14px;
}
.download-info-row:last-child { border-bottom: none; }
.download-info-label {
    color: var(--text-3);
    font-weight: 500;
}
.download-info-val {
    color: var(--text);
    font-weight: 600;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
}
.modal-download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 18px;
    background: var(--grad-2);
    color: #fff !important;
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 600;
    transition: all 0.25s;
    box-shadow: 0 10px 30px -8px rgba(79, 70, 229, 0.5);
}
.modal-download-btn svg { width: 18px; height: 18px; }
.modal-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 40px -8px rgba(79, 70, 229, 0.6);
}
.modal-tip {
    margin-top: 20px;
    padding: 14px 18px;
    background: rgba(245, 158, 11, 0.08);
    border-radius: var(--radius-sm);
    color: #b45309;
    font-size: 13px;
    text-align: center;
}

/* Video Modal */
.video-frame {
    background: #0f172a;
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 24px;
    aspect-ratio: 16/9;
}
.video-frame-inner {
    width: 100%;
    height: 100%;
    position: relative;
}
.video-frame iframe {
    width: 100%;
    height: 100%;
    display: block;
}
.video-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.7);
    text-align: center;
    padding: 24px;
}
.video-placeholder svg {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    color: var(--primary-light);
    opacity: 0.8;
}
.video-placeholder h4 {
    font-size: 18px;
    color: #fff;
    margin-bottom: 8px;
    font-weight: 600;
}
.video-placeholder p {
    font-size: 13px;
    color: rgba(255,255,255,0.5);
    font-family: 'JetBrains Mono', monospace;
}
.modal-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}
.modal-btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--grad-2);
    color: #fff !important;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 15px;
    transition: all 0.25s;
    flex: 1;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(79, 70, 229, 0.3);
}
.modal-btn-primary svg { width: 16px; height: 16px; }
.modal-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 28px rgba(79, 70, 229, 0.4);
}
.modal-btn-ghost {
    padding: 14px 28px;
    background: var(--bg-soft);
    color: var(--text-2);
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 15px;
    transition: all 0.25s;
}
.modal-btn-ghost:hover {
    background: var(--border);
    color: var(--text);
}

/* Contact Modal */
.qr-x {
    text-align: center;
    padding: 24px;
    background: var(--bg-soft);
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
}
.qr-x-frame {
    width: 220px;
    height: 220px;
    margin: 0 auto 16px;
    padding: 12px;
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}
.qr-x-frame img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}
.qr-x-hint {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-2);
    font-size: 14px;
    font-weight: 500;
}
.qr-x-hint svg { width: 18px; height: 18px; color: var(--primary); }

.contact-services {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.contact-service {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    background: var(--bg-soft);
    border-radius: var(--radius);
}
.contact-service-icon {
    font-size: 22px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    border-radius: 10px;
    flex-shrink: 0;
}
.contact-service strong {
    display: block;
    font-size: 14px;
    color: var(--text);
    font-weight: 700;
}
.contact-service em {
    display: block;
    font-size: 12px;
    color: var(--text-3);
    font-style: normal;
    margin-top: 2px;
}

/* ========== Docs Modal ========== */
.docs-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 24px;
}
.docs-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px;
    background: var(--bg-soft);
    border-radius: var(--radius);
    border: 1px solid var(--border-soft);
    transition: all 0.25s;
    text-align: left;
}
.docs-item:hover {
    background: #fff;
    transform: translateX(4px);
    border-color: rgba(99,102,241,0.3);
    box-shadow: var(--shadow-sm);
}
.docs-item-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.docs-item-icon svg { width: 20px; height: 20px; }
.docs-item-content { flex: 1; }
.docs-item-content strong {
    display: block;
    font-size: 14.5px;
    color: var(--text);
    font-weight: 700;
    margin-bottom: 2px;
}
.docs-item-content span {
    font-size: 12.5px;
    color: var(--text-3);
}
.docs-item-arrow {
    width: 18px;
    height: 18px;
    color: var(--text-3);
    flex-shrink: 0;
    transition: transform 0.2s, color 0.2s;
}
.docs-item:hover .docs-item-arrow {
    transform: translateX(4px);
    color: var(--primary);
}

/* ========== Chapter 07 — 文章资讯 ========== */
.chapter-articles {
    background: #fff;
}

.article-featured {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 0;
    background: var(--bg-soft);
    border-radius: var(--radius-xl);
    overflow: hidden;
    margin-bottom: 40px;
    border: 1px solid var(--border-soft);
    transition: all 0.3s;
}
.article-featured:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
    border-color: rgba(99,102,241,0.2);
}
.article-featured-cover {
    position: relative;
    min-height: 380px;
    background:
        radial-gradient(circle at 30% 30%, #c7d2fe 0%, transparent 60%),
        radial-gradient(circle at 70% 70%, #ddd6fe 0%, transparent 60%),
        linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 40px;
    color: #fff;
    overflow: hidden;
}
.article-cover-bg {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
}
.article-cover-tag {
    position: absolute;
    top: 24px;
    left: 40px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    letter-spacing: 0.16em;
    font-weight: 600;
    padding: 6px 12px;
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(8px);
    border-radius: 100px;
}
.article-cover-title {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    font-size: clamp(24px, 2.6vw, 32px);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    position: relative;
    z-index: 1;
}
.article-cover-meta {
    font-size: 13px;
    opacity: 0.85;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}
.article-cover-meta .dot { opacity: 0.5; }
.article-featured-content {
    padding: 50px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.article-cat {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    color: var(--primary);
    background: rgba(99,102,241,0.1);
    padding: 5px 12px;
    border-radius: 100px;
    margin-bottom: 20px;
    letter-spacing: 0.04em;
    align-self: flex-start;
}
.article-featured-content h3 {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    font-size: clamp(22px, 2.4vw, 28px);
    font-weight: 700;
    color: var(--text);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    line-height: 1.3;
}
.article-featured-content p {
    font-size: 14.5px;
    color: var(--text-2);
    line-height: 1.75;
    margin-bottom: 24px;
}
.article-read-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-weight: 600;
    font-size: 14px;
    transition: gap 0.2s;
    align-self: flex-start;
}
.article-read-more:hover { gap: 10px; }
.article-read-more svg { width: 16px; height: 16px; }

.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}
.article-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-soft);
    transition: all 0.3s;
    cursor: pointer;
}
.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(99,102,241,0.2);
}
.article-card-cover {
    height: 180px;
    position: relative;
    overflow: hidden;
}
.article-cover-cat {
    position: absolute;
    top: 14px;
    left: 14px;
    font-size: 11px;
    font-weight: 700;
    color: #fff;
    background: rgba(15,23,42,0.6);
    backdrop-filter: blur(8px);
    padding: 5px 12px;
    border-radius: 100px;
    letter-spacing: 0.04em;
}
.article-cover-1 {
    background:
        linear-gradient(135deg, rgba(99,102,241,0.85), rgba(139,92,246,0.85)),
        radial-gradient(circle at 30% 30%, #c7d2fe, transparent 60%);
}
.article-cover-2 {
    background:
        linear-gradient(135deg, rgba(236,72,153,0.85), rgba(244,63,94,0.85)),
        radial-gradient(circle at 70% 70%, #fbcfe8, transparent 60%);
}
.article-cover-3 {
    background:
        linear-gradient(135deg, rgba(6,182,212,0.85), rgba(59,130,246,0.85)),
        radial-gradient(circle at 30% 70%, #a5f3fc, transparent 60%);
}
.article-cover-4 {
    background:
        linear-gradient(135deg, rgba(245,158,11,0.85), rgba(239,68,68,0.85)),
        radial-gradient(circle at 70% 30%, #fed7aa, transparent 60%);
}
.article-cover-5 {
    background:
        linear-gradient(135deg, rgba(139,92,246,0.85), rgba(99,102,241,0.85)),
        radial-gradient(circle at 50% 50%, #ddd6fe, transparent 60%);
}
.article-cover-6 {
    background:
        linear-gradient(135deg, rgba(16,185,129,0.85), rgba(20,184,166,0.85)),
        radial-gradient(circle at 30% 30%, #a7f3d0, transparent 60%);
}
.article-card-body { padding: 28px; }
.article-card-body h4 {
    font-family: 'Space Grotesk', 'Noto Sans SC', sans-serif;
    font-size: 17px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 12px;
    line-height: 1.4;
    letter-spacing: -0.01em;
    transition: color 0.3s;
}
.article-card:hover h4 { color: var(--primary); }
.article-card-body p {
    font-size: 13.5px;
    color: var(--text-2);
    line-height: 1.65;
    margin-bottom: 20px;
}
.article-card-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-3);
    flex-wrap: wrap;
}
.article-card-meta .dot { opacity: 0.5; }

.article-more {
    text-align: center;
}
.article-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    background: #fff;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.25s;
}
.article-more-btn:hover {
    background: var(--text);
    color: #fff;
    border-color: var(--text);
    transform: translateY(-2px);
}
.article-more-btn svg { width: 16px; height: 16px; }
.article-more-hint {
    margin-top: 14px;
    font-size: 13px;
    color: var(--text-3);
}

/* ========== Scroll Progress 阅读进度条 ========== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0;
    background: var(--grad-1);
    border-radius: 0 100px 100px 0;
    z-index: 200;
    pointer-events: none;
}

/* ========== Fade-in Animation ========== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ========== Responsive ========== */
@media (max-width: 1100px) {
    .dashboard-x { grid-template-columns: repeat(2, 1fr); }
    .media-x-wrap { grid-template-columns: 1fr; }
    .engine-grid { grid-template-columns: 1fr; }
    .testimonials-x { grid-template-columns: 1fr; }
    .chapter-grid { grid-template-columns: 1fr; gap: 40px; }
    .data-strip-inner { grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .data-strip-cell { border-right: none; }
    .nav-menu { display: none; }
    .nav-toggle { display: flex; }
    .nav-menu.open {
        display: flex;
        position: absolute;
        top: 80px; left: 16px; right: 16px;
        flex-direction: column;
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 12px;
        box-shadow: var(--shadow-lg);
    }
    .nav-menu.open a { padding: 12px 16px; }
}
@media (max-width: 768px) {
    .hero { padding: 140px 24px 0; }
    .hero-bottom { grid-template-columns: 1fr; gap: 30px; padding-top: 30px; }
    .hero-actions { justify-content: flex-start; }
    .rpa-x-grid,
    .cases-x-grid,
    .action-grid {
        grid-template-columns: 1fr;
    }
    .case-x.case-x-large { grid-column: span 1; }
    .footer-top { flex-direction: column; align-items: flex-start; gap: 20px; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { justify-content: center; text-align: center; }
    .modal-dialog { padding: 40px 24px 30px; }
    .action-card { padding: 40px 28px; }
}
@media (max-width: 480px) {
    .data-strip-inner { grid-template-columns: repeat(2, 1fr); }
    .container { padding: 0 20px; }
    .chapter { padding: 90px 20px; }
    .hero { padding: 130px 20px 0; }
    .footer { padding: 60px 20px 30px; }
}

/* ========== 品质细节 ========== */
::selection {
    background: rgba(99, 102, 241, 0.22);
}
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: #c7d2fe;
    border-radius: 100px;
    border: 2px solid #fafbff;
}
::-webkit-scrollbar-thumb:hover { background: #a5b4fc; }