/* ========================================
   北极星 · 智能运维 — 首页样式
   严格参考 lbs.qq.com 浅色清爽风格
   ======================================== */

:root {
    --bg-page: #F3F8FD;
    --bg-card: #FFFFFF;
    --bg-tab-active: #F2F8FE;
    --color-primary: #146FFF;
    --color-primary-end: #1AA0FF;
    --gradient-primary: linear-gradient(90deg, #146FFF 0%, #1AA0FF 100%);
    --text-heading: rgba(0, 0, 0, 0.9);
    --text-body: rgba(15, 24, 41, 0.7);
    --text-muted: rgba(15, 24, 41, 0.5);
    --text-white: #FFFFFF;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 23px;
    --transition: 0.3s ease-in-out;
    --font-family: "PingFang SC", "SF Pro SC", "SF Pro Display", "Noto Sans SC", "Helvetica Neue", Helvetica, Arial, sans-serif;
    --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.04);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.08);
    --color-teal: #06B6A8;
    --color-purple: #7C3AED;
    --color-gold: #EA9B0C;
    --color-indigo: #4F5EE8;
    --color-cyan: #0891B2;
    --color-orange: #EA580C;
    --color-pink: #DB2777;
    --color-red: #DC2626;
    --color-green: #16A34A;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-family);
    color: var(--text-body);
    background: var(--bg-page);
    line-height: 1.5;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; transition: color var(--transition); }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1272px; margin: 0 auto; padding: 0 40px; }

/* --- Buttons --- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 24px; border-radius: 9px;
    font-size: 16px; font-weight: 600; cursor: pointer;
    transition: all 0.3s; border: none; white-space: nowrap;
}
.btn-primary { background: var(--gradient-primary); color: var(--text-white); }
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--color-primary); border: 1.5px solid var(--color-primary); }
.btn-outline:hover { background: var(--color-primary); color: var(--text-white); }
.btn-lg { padding: 14px 32px; font-size: 16px; }
.btn-white { background: #fff; color: var(--color-primary); }
.btn-white:hover { background: #f0f6ff; }

/* ==================== HEADER ==================== */
.header {
    position: fixed; top: 0; left: 0; right: 0;
    z-index: 99999; height: 56px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    transition: all var(--transition);
}
.header.scrolled { box-shadow: 0 1px 8px rgba(0, 0, 0, 0.06); }
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: 56px; max-width: 1400px; margin: 0 auto; padding: 0 40px;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon {
    display: flex; align-items: center; justify-content: center;
    width: 32px; height: 32px;
    background: var(--gradient-primary);
    border-radius: 8px; font-size: 16px; color: #fff;
}
img.logo-icon { object-fit: contain; background: transparent; }
.logo-text { font-size: 18px; font-weight: 700; color: var(--text-heading); }
.logo-badge {
    font-size: 11px; color: var(--text-muted);
    background: var(--bg-tab-active); padding: 2px 8px; border-radius: 10px;
}
.nav { display: flex; gap: 20px; }
.nav-link {
    color: var(--text-heading);
    font-size: 15px; font-weight: 400;
    position: relative; padding: 4px 0;
    white-space: nowrap;
}
.nav-link::after {
    content: ''; position: absolute;
    bottom: -2px; left: 0;
    width: 0; height: 2px;
    background: var(--color-primary);
    transition: width var(--transition);
}
.nav-link:hover { color: var(--color-primary); }
.nav-link:hover::after { width: 100%; }
.nav-link.nav-active { font-weight: 600; color: var(--color-primary); }
.nav-link.nav-active::after { width: 100%; }
.header-actions { display: flex; gap: 12px; align-items: center; }
.header-actions .btn-primary { border-radius: 4px; padding: 8px 20px; font-size: 14px; }
.mobile-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.mobile-toggle span { width: 22px; height: 2px; background: var(--text-heading); border-radius: 2px; }

/* ==================== HERO ==================== */
.hero {
    position: relative; padding-top: 56px;
    background: var(--bg-page); min-height: 600px;
    display: flex; align-items: center; overflow: hidden;
}
.hero::before {
    content: ''; position: absolute; top: 0; right: 0;
    width: 60%; height: 100%;
    background: radial-gradient(ellipse at 80% 40%, rgba(20, 111, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
}
.hero-inner {
    display: flex; align-items: center; justify-content: space-between;
    gap: 60px; padding: 80px 0 60px;
    position: relative; z-index: 2;
}
.hero-content { flex: 1; max-width: 620px; }
.hero-eyebrow {
    display: inline-block;
    font-size: 13px; color: var(--color-primary); font-weight: 500;
    margin-bottom: 20px; letter-spacing: 1px;
    padding: 4px 12px;
    background: rgba(20, 111, 255, 0.08);
    border-radius: 20px;
}
.hero-title {
    font-size: 44px; font-weight: 800;
    color: var(--text-heading);
    line-height: 60px; margin-bottom: 20px;
    letter-spacing: -0.5px;
}
.hero-title .accent {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc { font-size: 16px; color: var(--text-body); line-height: 28px; margin-bottom: 32px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 32px; }
.hero-tag {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: 14px; color: var(--text-body);
    background: var(--bg-card);
    border: 1px solid rgba(0,0,0,0.06);
    padding: 6px 16px; border-radius: 20px;
}
.hero-tag i { color: var(--color-primary); font-size: 12px; }
.hero-actions { display: flex; gap: 16px; }

/* Hero Visual */
.hero-visual { flex: 0 0 420px; height: 380px; position: relative; }
.hero-loop { width: 100%; height: 100%; position: relative; }
.loop-svg { position: absolute; inset: 0; width: 100%; height: 100%; animation: loop-rotate 40s linear infinite; }
@keyframes loop-rotate { to { transform: rotate(360deg); } }
.loop-center {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.loop-center i {
    width: 76px; height: 76px;
    display: flex; align-items: center; justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    font-size: 30px; color: #fff;
    box-shadow: 0 4px 24px rgba(20, 111, 255, 0.3);
}
.loop-center span { font-size: 13px; color: var(--text-heading); font-weight: 600; }
.loop-node {
    position: absolute;
    display: flex; flex-direction: column; align-items: center; gap: 4px;
    animation: node-float 4s ease-in-out infinite;
}
.loop-node i {
    width: 44px; height: 44px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%;
    font-size: 16px; color: var(--color-primary);
    background: var(--bg-card);
    border: 1.5px solid rgba(20, 111, 255, 0.15);
    box-shadow: var(--shadow-card);
    transition: all var(--transition);
}
.loop-node span { font-size: 11px; color: var(--text-body); font-weight: 500; }
.ln-1 { top: 2%; left: 50%; transform: translateX(-50%); animation-delay: 0s; }
.ln-2 { top: 14%; right: 4%; animation-delay: 0.6s; }
.ln-3 { top: 40%; right: -4%; animation-delay: 1.2s; }
.ln-4 { bottom: 14%; right: 6%; animation-delay: 1.8s; }
.ln-5 { bottom: 2%; left: 50%; transform: translateX(-50%); animation-delay: 2.4s; }
.ln-6 { bottom: 14%; left: 6%; animation-delay: 3s; }
.ln-7 { top: 40%; left: -4%; animation-delay: 3.6s; }
@keyframes node-float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }

/* ==================== STATS BAR ==================== */
.stats-bar { background: var(--bg-page); padding: 0 0 60px; }
.stats-inner {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    box-shadow: var(--shadow-card);
}
.stat-item { text-align: center; }
.stat-number { font-size: 40px; font-weight: 800; color: var(--text-heading); line-height: 1; }
.stat-unit { font-size: 16px; font-weight: 500; color: var(--color-primary); }
.stat-label { display: block; font-size: 15px; color: var(--text-body); margin-top: 10px; }

/* ==================== SECTIONS COMMON ==================== */
.section { padding: 96px 0; }
.section-alt { background: #EDF4FC; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 12px; font-weight: 600; letter-spacing: 2px;
    text-transform: uppercase; color: var(--color-primary);
    margin-bottom: 16px;
}
.section-eyebrow::before, .section-eyebrow::after {
    content: ''; width: 24px; height: 1px; background: var(--color-primary);
}
.section-title {
    font-size: 36px; font-weight: 800;
    color: var(--text-heading);
    line-height: 50px; margin-bottom: 16px;
    letter-spacing: -0.5px;
}
.section-desc {
    font-size: 16px; color: var(--text-body);
    max-width: 720px; margin: 0 auto; line-height: 28px;
}

/* ==================== INTRO ==================== */
.intro-paradigm {
    display: grid; grid-template-columns: 1fr auto 1fr;
    gap: 0; align-items: stretch; margin-bottom: 80px;
}
.paradigm-side {
    padding: 40px 36px; border-radius: var(--radius-lg);
    position: relative; background: var(--bg-card);
    box-shadow: var(--shadow-card);
}
.paradigm-old { border: 1px solid rgba(220, 38, 38, 0.12); background: #FFF7F6; }
.paradigm-new { border: 1px solid rgba(20, 111, 255, 0.15); background: linear-gradient(180deg, #F5FAFF, #EAF3FF); }
.paradigm-label {
    display: inline-block;
    font-size: 11px; font-weight: 700; letter-spacing: 2px;
    text-transform: uppercase; margin-bottom: 14px;
    padding: 4px 12px; border-radius: 20px;
}
.paradigm-old .paradigm-label { background: rgba(220, 38, 38, 0.1); color: var(--color-red); }
.paradigm-new .paradigm-label { background: rgba(20, 111, 255, 0.1); color: var(--color-primary); }
.paradigm-side h3 { font-size: 22px; font-weight: 700; color: var(--text-heading); margin-bottom: 12px; }
.paradigm-side > p { font-size: 14px; color: var(--text-body); line-height: 24px; margin-bottom: 20px; }
.paradigm-side ul { display: flex; flex-direction: column; gap: 10px; }
.paradigm-side li {
    font-size: 14px; color: var(--text-body);
    display: flex; align-items: flex-start; gap: 10px; line-height: 22px;
}
.paradigm-old li i { color: var(--color-red); font-size: 12px; margin-top: 5px; }
.paradigm-new li i { color: var(--color-primary); font-size: 12px; margin-top: 5px; }
.paradigm-arrow {
    display: flex; align-items: center; justify-content: center;
    padding: 0 24px; color: var(--color-primary); font-size: 24px;
}

/* Brain Diagram */
.brain-block {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 56px 48px;
    box-shadow: var(--shadow-card);
    margin-bottom: 56px;
}
.brain-title { text-align: center; margin-bottom: 40px; }
.brain-title h3 {
    font-size: 24px; font-weight: 700; color: var(--text-heading);
    margin-bottom: 12px; display: inline-flex; align-items: center; gap: 10px;
}
.brain-title h3 i { color: var(--color-primary); }
.brain-title p { font-size: 15px; color: var(--text-body); line-height: 26px; max-width: 720px; margin: 0 auto; }
.brain-title strong { color: var(--color-primary); font-weight: 600; }
.brain-diagram {
    display: flex; align-items: center; justify-content: center;
    gap: 40px; flex-wrap: wrap; margin-bottom: 40px;
}
.brain-node {
    text-align: center; padding: 28px 32px;
    border-radius: var(--radius-md); min-width: 220px;
    background: #F7FAFF;
    border: 1px solid rgba(20, 111, 255, 0.12);
    transition: all var(--transition);
}
.brain-node:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.brain-node-mc { background: #F0FBF9; border-color: rgba(6, 182, 168, 0.15); }
.brain-node-polaris { background: linear-gradient(180deg, #EEF5FF, #E1ECFF); border-color: rgba(20, 111, 255, 0.2); }
.brain-icon {
    width: 64px; height: 64px; margin: 0 auto 14px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 26px; background: #fff;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}
.brain-node-mc .brain-icon { color: var(--color-teal); }
.brain-node-polaris .brain-icon { color: var(--color-primary); }
.brain-name { font-size: 18px; font-weight: 700; color: var(--text-heading); margin-bottom: 4px; }
.brain-role { font-size: 13px; color: var(--text-body); font-weight: 500; margin-bottom: 6px; }
.brain-detail { font-size: 12px; color: var(--text-muted); letter-spacing: 1px; }
.brain-link { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.brain-link-line {
    width: 80px; height: 2px;
    background: linear-gradient(90deg, var(--color-teal), var(--color-primary));
    position: relative;
}
.brain-link-line::before, .brain-link-line::after {
    content: ''; position: absolute; top: -3px;
    width: 0; height: 0;
    border-top: 4px solid transparent; border-bottom: 4px solid transparent;
}
.brain-link-line::before { left: -2px; border-right: 6px solid var(--color-teal); }
.brain-link-line::after { right: -2px; border-left: 6px solid var(--color-primary); }
.brain-link-text {
    font-size: 12px; font-weight: 600; color: var(--color-primary);
    display: inline-flex; align-items: center; gap: 4px;
}
.brain-flow {
    display: flex; align-items: center; justify-content: center;
    gap: 12px; flex-wrap: wrap; padding: 20px;
    background: var(--bg-tab-active); border-radius: var(--radius-md);
}
.brain-flow-step {
    padding: 8px 20px; background: #fff;
    border-radius: 20px;
    font-size: 14px; font-weight: 600; color: var(--text-heading);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}
.brain-flow-final { background: var(--gradient-primary); color: #fff; }
.brain-flow i { color: var(--color-primary); font-size: 12px; opacity: 0.5; }

/* Target Users */
.intro-target {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 40px; text-align: center;
    box-shadow: var(--shadow-card);
}
.intro-target h3 { font-size: 20px; font-weight: 700; color: var(--text-heading); margin-bottom: 24px; }
.intro-target-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.intro-target-item {
    display: flex; flex-direction: column; align-items: center; gap: 10px;
    padding: 20px 12px;
    background: #FFF7F6;
    border-radius: var(--radius-md);
    border: 1px solid rgba(220, 38, 38, 0.1);
    transition: all var(--transition);
}
.intro-target-item:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(220, 38, 38, 0.08); }
.intro-target-item i { font-size: 22px; color: var(--color-red); }
.intro-target-item span { font-size: 14px; font-weight: 600; color: var(--text-heading); }

/* ==================== ADVANTAGES ==================== */
.adv-flow {
    display: flex; align-items: center; justify-content: center;
    gap: 6px; margin-bottom: 56px; flex-wrap: wrap;
    padding: 32px 20px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}
.adv-flow-step {
    display: flex; flex-direction: column; align-items: center; gap: 6px;
    padding: 12px 14px; min-width: 92px;
    position: relative; transition: all var(--transition);
}
.adv-flow-step:hover { transform: translateY(-3px); }
.adv-flow-num {
    position: absolute; top: 0; left: 50%; transform: translateX(-50%);
    font-size: 10px; font-weight: 700; color: var(--color-primary);
    letter-spacing: 1px; opacity: 0.5;
}
.adv-flow-step i {
    width: 48px; height: 48px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%; font-size: 20px;
    background: var(--bg-tab-active); color: var(--color-primary);
    margin-top: 12px;
    border: 1.5px solid rgba(20, 111, 255, 0.15);
    transition: all var(--transition);
}
.adv-flow-step:hover i {
    background: var(--gradient-primary); color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 16px rgba(20, 111, 255, 0.25);
}
.adv-flow-step h4 { font-size: 15px; font-weight: 700; color: var(--text-heading); }
.adv-flow-step p { font-size: 11px; color: var(--text-muted); text-align: center; line-height: 16px; }
.adv-flow-arrow { color: var(--color-primary); font-size: 12px; opacity: 0.35; }

.ability-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.ability-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    position: relative; overflow: hidden;
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: var(--shadow-card);
}
.ability-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; }
.ability-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.ability-icon {
    width: 52px; height: 52px;
    border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; margin-bottom: 20px;
}
.ability-subtitle {
    font-size: 11px; font-weight: 700;
    letter-spacing: 1.5px; text-transform: uppercase;
    margin-bottom: 6px; opacity: 0.75;
}
.ability-card h3 { font-size: 20px; font-weight: 700; color: var(--text-heading); margin-bottom: 12px; }
.ability-card p { font-size: 13px; color: var(--text-body); line-height: 22px; margin-bottom: 18px; }
.ability-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.ability-tags span {
    padding: 3px 10px; border-radius: 100px;
    font-size: 11px; font-weight: 500; border: 1px solid;
}

.ability-c1::before { background: linear-gradient(90deg, var(--color-teal), rgba(6,182,168,0.3)); }
.ability-c1 .ability-icon { background: rgba(6, 182, 168, 0.1); color: var(--color-teal); }
.ability-c1 .ability-subtitle { color: var(--color-teal); }
.ability-c1 .ability-tags span { background: rgba(6, 182, 168, 0.08); border-color: rgba(6, 182, 168, 0.2); color: var(--color-teal); }
.ability-c2::before { background: linear-gradient(90deg, var(--color-purple), rgba(124,58,237,0.3)); }
.ability-c2 .ability-icon { background: rgba(124, 58, 237, 0.1); color: var(--color-purple); }
.ability-c2 .ability-subtitle { color: var(--color-purple); }
.ability-c2 .ability-tags span { background: rgba(124, 58, 237, 0.08); border-color: rgba(124, 58, 237, 0.2); color: var(--color-purple); }
.ability-c3::before { background: linear-gradient(90deg, var(--color-gold), rgba(234,155,12,0.3)); }
.ability-c3 .ability-icon { background: rgba(234, 155, 12, 0.1); color: var(--color-gold); }
.ability-c3 .ability-subtitle { color: var(--color-gold); }
.ability-c3 .ability-tags span { background: rgba(234, 155, 12, 0.08); border-color: rgba(234, 155, 12, 0.2); color: var(--color-gold); }
.ability-c4::before { background: linear-gradient(90deg, var(--color-indigo), rgba(79,94,232,0.3)); }
.ability-c4 .ability-icon { background: rgba(79, 94, 232, 0.1); color: var(--color-indigo); }
.ability-c4 .ability-subtitle { color: var(--color-indigo); }
.ability-c4 .ability-tags span { background: rgba(79, 94, 232, 0.08); border-color: rgba(79, 94, 232, 0.2); color: var(--color-indigo); }
.ability-c5::before { background: linear-gradient(90deg, var(--color-primary), rgba(20,111,255,0.3)); }
.ability-c5 .ability-icon { background: rgba(20, 111, 255, 0.1); color: var(--color-primary); }
.ability-c5 .ability-subtitle { color: var(--color-primary); }
.ability-c5 .ability-tags span { background: rgba(20, 111, 255, 0.08); border-color: rgba(20, 111, 255, 0.2); color: var(--color-primary); }
.ability-c6::before { background: linear-gradient(90deg, var(--color-orange), rgba(234,88,12,0.3)); }
.ability-c6 .ability-icon { background: rgba(234, 88, 12, 0.1); color: var(--color-orange); }
.ability-c6 .ability-subtitle { color: var(--color-orange); }
.ability-c6 .ability-tags span { background: rgba(234, 88, 12, 0.08); border-color: rgba(234, 88, 12, 0.2); color: var(--color-orange); }
.ability-c7::before { background: linear-gradient(90deg, var(--color-pink), rgba(219,39,119,0.3)); }
.ability-c7 .ability-icon { background: rgba(219, 39, 119, 0.1); color: var(--color-pink); }
.ability-c7 .ability-subtitle { color: var(--color-pink); }
.ability-c7 .ability-tags span { background: rgba(219, 39, 119, 0.08); border-color: rgba(219, 39, 119, 0.2); color: var(--color-pink); }

/* ==================== SKILLS ==================== */
.skills-subhead { text-align: center; margin-bottom: 32px; }
.skills-subhead h3 {
    font-size: 22px; font-weight: 700; color: var(--text-heading);
    margin-bottom: 10px;
    display: inline-flex; align-items: center; gap: 10px;
}
.skills-subhead h3 i { color: var(--color-primary); }
.skills-subhead p { font-size: 14px; color: var(--text-body); line-height: 24px; max-width: 720px; margin: 0 auto; }

.theme-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.theme-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 28px;
    position: relative; overflow: hidden;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: var(--shadow-card);
}
.theme-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; }
.theme-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.theme-icon {
    width: 48px; height: 48px;
    border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; margin-bottom: 18px;
}
.theme-card h4 { font-size: 17px; font-weight: 700; color: var(--text-heading); margin-bottom: 4px; }
.theme-code {
    font-family: 'Courier New', monospace;
    font-size: 11px; color: var(--text-muted);
    margin-bottom: 14px; letter-spacing: 0.5px;
}
.theme-card p { font-size: 13px; color: var(--text-body); line-height: 22px; }

.theme-c1::before { background: linear-gradient(90deg, var(--color-primary), rgba(20,111,255,0.3)); }
.theme-c1 .theme-icon { background: rgba(20, 111, 255, 0.1); color: var(--color-primary); }
.theme-c2::before { background: linear-gradient(90deg, var(--color-teal), rgba(6,182,168,0.3)); }
.theme-c2 .theme-icon { background: rgba(6, 182, 168, 0.1); color: var(--color-teal); }
.theme-c3::before { background: linear-gradient(90deg, var(--color-gold), rgba(234,155,12,0.3)); }
.theme-c3 .theme-icon { background: rgba(234, 155, 12, 0.1); color: var(--color-gold); }
.theme-c4::before { background: linear-gradient(90deg, var(--color-red), rgba(220,38,38,0.3)); }
.theme-c4 .theme-icon { background: rgba(220, 38, 38, 0.1); color: var(--color-red); }
.theme-c5::before { background: linear-gradient(90deg, var(--color-purple), rgba(124,58,237,0.3)); }
.theme-c5 .theme-icon { background: rgba(124, 58, 237, 0.1); color: var(--color-purple); }
.theme-c6::before { background: linear-gradient(90deg, var(--color-cyan), rgba(8,145,178,0.3)); }
.theme-c6 .theme-icon { background: rgba(8, 145, 178, 0.1); color: var(--color-cyan); }

.scene-tabs { display: flex; gap: 10px; margin-bottom: 32px; flex-wrap: wrap; justify-content: center; }
.scene-tab {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 10px 22px; border-radius: 100px;
    font-size: 14px; font-weight: 600; cursor: pointer;
    border: 1px solid rgba(20, 111, 255, 0.15);
    background: var(--bg-card); color: var(--text-body);
    transition: all 0.25s; font-family: inherit;
}
.scene-tab:hover { color: var(--color-primary); border-color: rgba(20, 111, 255, 0.3); }
.scene-tab.active {
    background: var(--gradient-primary); color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(20, 111, 255, 0.2);
}
.scene-tab-count {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 20px; height: 20px; padding: 0 6px;
    background: rgba(20, 111, 255, 0.12); color: var(--color-primary);
    border-radius: 10px; font-size: 11px; font-weight: 700;
}
.scene-tab.active .scene-tab-count { background: rgba(255, 255, 255, 0.25); color: #fff; }
.scene-panel { display: none; }
.scene-panel.active { display: block; animation: panel-fade 0.4s ease; }
@keyframes panel-fade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.scene-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 26px 24px;
    transition: all 0.3s;
    box-shadow: var(--shadow-card);
    border: 1px solid transparent;
}
.scene-card:hover {
    border-color: rgba(20, 111, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}
.scene-card-head {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 4px; gap: 8px;
}
.scene-card-head h4 { font-size: 16px; font-weight: 700; color: var(--text-heading); }
.scene-code {
    font-family: 'Courier New', monospace;
    font-size: 11px; color: var(--text-muted);
    margin-bottom: 12px; letter-spacing: 0.5px;
}
.scene-card p { font-size: 13px; color: var(--text-body); line-height: 22px; }
.scene-badge { padding: 3px 10px; border-radius: 100px; font-size: 11px; font-weight: 600; flex-shrink: 0; }
.scene-badge-core { background: rgba(20, 111, 255, 0.1); color: var(--color-primary); }
.scene-badge-compliance { background: rgba(6, 182, 168, 0.1); color: var(--color-teal); }
.scene-badge-deep { background: rgba(124, 58, 237, 0.1); color: var(--color-purple); }
.scene-badge-fast { background: rgba(234, 155, 12, 0.1); color: var(--color-gold); }

/* ==================== ARCHITECTURE ==================== */
.arch-path {
    display: flex; align-items: center; justify-content: center;
    gap: 12px; margin-bottom: 64px; flex-wrap: wrap;
}
.arch-step {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 28px 24px; text-align: center;
    flex: 1; min-width: 200px; max-width: 260px;
    transition: all var(--transition);
    box-shadow: var(--shadow-card);
}
.arch-step:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.arch-step-num {
    display: inline-block;
    font-size: 11px; font-weight: 700;
    color: var(--color-primary);
    background: var(--bg-tab-active);
    padding: 3px 12px; border-radius: 10px;
    margin-bottom: 12px; letter-spacing: 1px;
}
.arch-step h4 { font-size: 17px; font-weight: 700; color: var(--text-heading); margin-bottom: 10px; }
.arch-step p { font-size: 13px; color: var(--text-body); line-height: 20px; }
.arch-arrow { color: var(--color-primary); font-size: 16px; flex-shrink: 0; opacity: 0.4; }
.arch-cap-title { text-align: center; margin-bottom: 32px; }
.arch-cap-title h3 {
    font-size: 22px; font-weight: 700; color: var(--text-heading);
    display: inline-flex; align-items: center; gap: 10px;
}
.arch-cap-title h3 i { color: var(--color-primary); }
.arch-capabilities { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.arch-cap-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 28px 20px; text-align: center;
    transition: all var(--transition);
    box-shadow: var(--shadow-card);
}
.arch-cap-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.arch-cap-icon {
    width: 52px; height: 52px;
    border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; margin: 0 auto 16px;
}
.icon-blue { background: rgba(20, 111, 255, 0.1); color: var(--color-primary); }
.icon-purple { background: rgba(124, 58, 237, 0.1); color: var(--color-purple); }
.icon-green { background: rgba(22, 163, 74, 0.1); color: var(--color-green); }
.icon-orange { background: rgba(234, 88, 12, 0.1); color: var(--color-orange); }
.icon-cyan { background: rgba(8, 145, 178, 0.1); color: var(--color-cyan); }
.arch-cap-card h4 { font-size: 15px; font-weight: 700; color: var(--text-heading); margin-bottom: 10px; }
.arch-cap-card p { font-size: 13px; color: var(--text-body); line-height: 22px; }

/* ==================== CASES ==================== */
.case-goal {
    background: linear-gradient(135deg, #EEF5FF, #E1ECFF);
    border-radius: var(--radius-lg);
    padding: 40px 44px; margin-bottom: 56px;
    text-align: center;
    border: 1px solid rgba(20, 111, 255, 0.12);
}
.case-goal-label {
    display: inline-block;
    font-size: 12px; font-weight: 700;
    letter-spacing: 2px; text-transform: uppercase;
    color: var(--color-primary);
    background: #fff;
    padding: 5px 16px; border-radius: 20px;
    margin-bottom: 16px;
}
.case-goal p { font-size: 16px; color: var(--text-body); line-height: 28px; max-width: 900px; margin: 0 auto 20px; }
.case-goal strong { color: var(--color-primary); font-weight: 600; }
.case-goal-sources { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.case-goal-sources span {
    padding: 6px 16px; background: #fff;
    border-radius: 100px;
    font-size: 12px; font-weight: 600; color: var(--color-primary);
    border: 1px solid rgba(20, 111, 255, 0.2);
}
.case-subhead { text-align: center; margin: 56px 0 32px; }
.case-subhead h3 {
    font-size: 22px; font-weight: 700; color: var(--text-heading);
    margin-bottom: 8px;
    display: inline-flex; align-items: center; gap: 10px;
}
.case-subhead h3 i { color: var(--color-primary); }
.case-subhead p { font-size: 14px; color: var(--text-body); max-width: 720px; margin: 0 auto; line-height: 24px; }

.blindspot-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.blindspot-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 32px 28px;
    position: relative; overflow: hidden;
    transition: all var(--transition);
    box-shadow: var(--shadow-card);
    border-top: 3px solid var(--color-red);
}
.blindspot-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.blindspot-num {
    font-size: 44px; font-weight: 800;
    color: rgba(220, 38, 38, 0.1);
    position: absolute; top: 12px; right: 20px; line-height: 1;
}
.blindspot-card h4 {
    font-size: 17px; font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 12px; padding-right: 60px;
}
.blindspot-card p { font-size: 13px; color: var(--text-body); line-height: 22px; margin-bottom: 14px; }
.blindspot-card strong { color: var(--color-red); font-weight: 600; }
.blindspot-example {
    background: #FFF7F6;
    border-left: 3px solid var(--color-red);
    padding: 12px 14px; border-radius: 4px;
    font-size: 12px; color: var(--text-body); line-height: 20px;
}
.blindspot-example strong { color: var(--color-red); }

.solution-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.solution-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 32px 28px 32px 84px;
    position: relative;
    transition: all var(--transition);
    box-shadow: var(--shadow-card);
}
.solution-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.solution-num {
    position: absolute; top: 28px; left: 28px;
    width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center;
    background: var(--gradient-primary); color: #fff;
    border-radius: 50%;
    font-size: 16px; font-weight: 700;
    box-shadow: 0 4px 12px rgba(20, 111, 255, 0.25);
}
.solution-card h4 { font-size: 17px; font-weight: 700; color: var(--text-heading); margin-bottom: 12px; }
.solution-card p { font-size: 13px; color: var(--text-body); line-height: 24px; }
.solution-card strong { color: var(--text-heading); font-weight: 600; }
.solution-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.solution-tags span {
    padding: 4px 12px;
    background: #FFF7F6;
    border: 1px solid rgba(220, 38, 38, 0.15);
    border-radius: 100px;
    font-size: 11px; font-weight: 600; color: var(--color-red);
}
.hl-red { color: var(--color-red); font-weight: 600; }
.hl-gold { color: var(--color-gold); font-weight: 600; }
.hl-blue { color: var(--color-primary); font-weight: 600; }
.hl-green { color: var(--color-green); font-weight: 600; }

.benefit-table {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-card);
}
.benefit-row {
    display: grid;
    grid-template-columns: 1.2fr 1.5fr 1.8fr;
    gap: 20px;
    padding: 18px 28px;
    align-items: center;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    font-size: 14px;
    transition: background 0.2s;
}
.benefit-row:last-child { border-bottom: none; }
.benefit-row:not(.benefit-header):hover { background: var(--bg-tab-active); }
.benefit-header {
    background: var(--bg-tab-active);
    font-weight: 700; color: var(--text-heading);
    font-size: 13px; letter-spacing: 1px; text-transform: uppercase;
}
.benefit-label { font-weight: 600; color: var(--text-heading); }
.benefit-from { color: var(--color-red); font-size: 13px; }
.benefit-to { color: var(--color-green); font-size: 13px; font-weight: 600; }

/* ==================== ABOUT ==================== */
.about-content {
    display: grid; grid-template-columns: 1.3fr 1fr;
    gap: 48px; align-items: center; margin-bottom: 48px;
}
.about-text h3 { font-size: 24px; font-weight: 700; color: var(--text-heading); margin-bottom: 16px; }
.about-text p { font-size: 15px; color: var(--text-body); line-height: 28px; margin-bottom: 14px; }
.about-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.about-stat-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 28px 20px; text-align: center;
    box-shadow: var(--shadow-card);
    transition: all var(--transition);
}
.about-stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.about-stat-num {
    font-size: 34px; font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1; margin-bottom: 8px;
}
.about-stat-label { font-size: 13px; color: var(--text-body); }
.about-info { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.about-info-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex; align-items: flex-start; gap: 14px;
    box-shadow: var(--shadow-card);
    transition: all var(--transition);
}
.about-info-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.about-info-icon {
    width: 42px; height: 42px;
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 18px;
    background: rgba(20, 111, 255, 0.1); color: var(--color-primary);
    flex-shrink: 0;
}
.about-info-card h4 { font-size: 14px; font-weight: 700; color: var(--text-heading); margin-bottom: 4px; }
.about-info-card p { font-size: 13px; color: var(--text-body); line-height: 20px; }
.about-info-card a { color: var(--color-primary); }
.about-info-card a:hover { text-decoration: underline; }

/* ==================== CTA ==================== */
.cta-section { background: linear-gradient(135deg, #146FFF 0%, #1AA0FF 100%); padding: 96px 0; }
.cta-inner { text-align: center; }
.cta-inner h2 {
    font-size: 36px; font-weight: 800;
    color: #fff; line-height: 50px; margin-bottom: 12px;
    letter-spacing: -0.5px;
}
.cta-inner > p { font-size: 16px; color: rgba(255, 255, 255, 0.85); margin-bottom: 48px; }
.cta-steps {
    display: flex; align-items: flex-start; justify-content: center;
    gap: 12px; margin-bottom: 48px; flex-wrap: wrap;
}
.cta-step {
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    padding: 24px; text-align: center;
    width: 210px;
    transition: all var(--transition);
}
.cta-step:hover { background: rgba(255, 255, 255, 0.18); transform: translateY(-2px); }
.cta-step span {
    display: block;
    font-size: 30px; font-weight: 800;
    color: #fff; margin-bottom: 8px; opacity: 0.9;
}
.cta-step h4 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.cta-step p { font-size: 13px; color: rgba(255, 255, 255, 0.8); line-height: 20px; }
.cta-arrow { color: rgba(255, 255, 255, 0.5); font-size: 16px; margin-top: 40px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.cta-actions .btn-outline { color: #fff; border-color: rgba(255, 255, 255, 0.6); }
.cta-actions .btn-outline:hover { background: #fff; color: var(--color-primary); border-color: #fff; }

/* ==================== FOOTER ==================== */
.footer { background: #0F1A2E; padding-top: 56px; color: rgba(255, 255, 255, 0.7); }
.footer-inner { display: flex; justify-content: space-between; gap: 48px; padding-bottom: 48px; }
.footer-brand { flex: 0 0 320px; }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-logo .logo-icon { width: 32px; height: 32px; font-size: 16px; }
.footer-logo .logo-text { font-size: 18px; font-weight: 700; color: #fff; }
.footer-brand p { font-size: 13px; color: rgba(255, 255, 255, 0.6); line-height: 22px; margin-bottom: 16px; }
.footer-badges { display: flex; flex-wrap: wrap; gap: 12px; }
.footer-badges span {
    font-size: 12px; color: rgba(255, 255, 255, 0.55);
    display: inline-flex; align-items: center; gap: 5px;
}
.footer-badges i { color: var(--color-primary-end); }
.footer-links { display: flex; gap: 48px; flex: 1; }
.footer-col { display: flex; flex-direction: column; gap: 10px; }
.footer-col h4, .footer-contact h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 6px; }
.footer-col a { font-size: 13px; color: rgba(255, 255, 255, 0.6); }
.footer-col a:hover { color: var(--color-primary-end); }
.footer-contact { flex: 0 0 240px; }
.footer-contact p {
    font-size: 13px;
    display: flex; align-items: flex-start; gap: 8px;
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 20px;
}
.footer-contact i { color: var(--color-primary-end); width: 16px; text-align: center; margin-top: 3px; }
.footer-bottom { padding: 20px 0; border-top: 1px solid rgba(255, 255, 255, 0.08); }
.footer-bottom p { font-size: 12px; color: rgba(255, 255, 255, 0.4); text-align: center; }
.footer-bottom a { color: rgba(255, 255, 255, 0.6); }
.footer-bottom a:hover { color: var(--color-primary-end); }

/* ==================== BACK TO TOP ==================== */
.back-to-top {
    position: fixed; bottom: 32px; right: 32px;
    width: 44px; height: 44px;
    background: var(--gradient-primary);
    color: #fff; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 14px;
    opacity: 0; visibility: hidden; transform: translateY(12px);
    transition: all var(--transition);
    box-shadow: 0 4px 16px rgba(20, 111, 255, 0.35);
    z-index: 999;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-3px); }

/* ==================== ANIMATIONS ==================== */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1200px) {
    .nav { gap: 14px; }
    .nav-link { font-size: 14px; }
    .ability-grid { grid-template-columns: repeat(3, 1fr); }
    .arch-capabilities { grid-template-columns: repeat(3, 1fr); }
    .intro-target-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 1024px) {
    .hero-title { font-size: 34px; line-height: 46px; }
    .hero-visual { flex: 0 0 340px; height: 340px; }
    .section-title { font-size: 30px; line-height: 42px; }
    .theme-grid, .scene-grid, .blindspot-grid { grid-template-columns: repeat(2, 1fr); }
    .ability-grid { grid-template-columns: repeat(2, 1fr); }
    .intro-paradigm { grid-template-columns: 1fr; gap: 16px; }
    .paradigm-arrow { transform: rotate(90deg); padding: 8px 0; }
    .about-content { grid-template-columns: 1fr; gap: 32px; }
    .about-info { grid-template-columns: 1fr; }
    .solution-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .container { padding: 0 20px; }
    .nav, .header-actions { display: none; }
    .mobile-toggle { display: flex; }
    .hero-inner { flex-direction: column; text-align: center; padding: 60px 0 40px; gap: 40px; }
    .hero-title { font-size: 28px; line-height: 40px; }
    .hero-tags { justify-content: center; }
    .hero-actions { justify-content: center; flex-wrap: wrap; }
    .hero-visual { flex: 0 0 280px; height: 280px; }
    .stats-inner { grid-template-columns: repeat(2, 1fr); gap: 24px; padding: 32px 24px; }
    .stat-number { font-size: 30px; }
    .section { padding: 64px 0; }
    .section-title { font-size: 26px; line-height: 36px; }
    .brain-block { padding: 36px 24px; }
    .brain-diagram { gap: 20px; }
    .brain-node { min-width: 180px; padding: 22px 20px; }
    .brain-link { transform: rotate(90deg); }
    .intro-target-grid { grid-template-columns: repeat(2, 1fr); }
    .adv-flow { padding: 24px 12px; gap: 4px; }
    .adv-flow-step { min-width: 76px; padding: 10px 6px; }
    .adv-flow-arrow { display: none; }
    .theme-grid, .scene-grid, .blindspot-grid { grid-template-columns: 1fr; }
    .ability-grid { grid-template-columns: 1fr; }
    .arch-path { flex-direction: column; }
    .arch-arrow { transform: rotate(90deg); }
    .arch-capabilities { grid-template-columns: repeat(2, 1fr); }
    .benefit-row { grid-template-columns: 1fr; gap: 6px; padding: 16px 20px; }
    .cta-steps { flex-direction: column; align-items: center; }
    .cta-arrow { transform: rotate(90deg); margin-top: 0; }
    .footer-inner { flex-direction: column; gap: 32px; }
    .footer-brand, .footer-contact { flex: none; }
    .footer-links { flex-wrap: wrap; gap: 24px; }
}
@media (max-width: 480px) {
    .hero-title { font-size: 24px; line-height: 34px; }
    .stats-inner { grid-template-columns: 1fr; }
    .arch-capabilities { grid-template-columns: 1fr; }
    .intro-target-grid { grid-template-columns: 1fr; }
    .cta-actions { flex-direction: column; align-items: center; }
}