/* ============================================
   千亦智能科技 官网样式
   中国埃森哲 | 助力中国企业落地数字化，成功转型AI+
   ============================================ */

/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Brand Colors */
    --navy-deep: #0A1A3A;
    --navy: #0F2557;
    --blue-primary: #1B4FD7;
    --blue-bright: #2B7FFF;
    --cyan: #00CFFD;
    --cyan-soft: #5DDFFF;
    --purple: #6C5CE7;
    --green: #00C896;
    --orange: #FF8C42;

    /* Neutrals */
    --text-dark: #0F172A;
    --text-body: #374151;
    --text-muted: #6B7280;
    --text-light: #9CA3AF;
    --bg-white: #FFFFFF;
    --bg-light: #F5F7FA;
    --bg-gray: #EEF2F7;
    --border-light: #E5E7EB;

    /* Gradients */
    --grad-hero: linear-gradient(135deg, #0A1A3A 0%, #0F2557 40%, #1B4FD7 100%);
    --grad-cyan: linear-gradient(135deg, #00CFFD 0%, #2B7FFF 100%);
    --grad-card: linear-gradient(135deg, #0F2557 0%, #1B4FD7 100%);
    --grad-dark: linear-gradient(180deg, #0A1A3A 0%, #0F172A 100%);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.10);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.15);
    --shadow-blue: 0 12px 40px rgba(27, 79, 215, 0.25);

    /* Layout */
    --container: 1200px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --header-h: 72px;

    /* Transitions */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--text-body);
    background: var(--bg-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s var(--ease);
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* ===== Container ===== */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Section ===== */
.section {
    padding: 80px 0;
}

.section-lg {
    padding: 100px 0;
}

.section-dark {
    background: var(--navy-deep);
    color: rgba(255, 255, 255, 0.85);
}

.section-gray {
    background: var(--bg-light);
}

/* ===== Section Header ===== */
.section-header {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 60px;
}

.section-header .eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--blue-bright);
    margin-bottom: 16px;
    padding: 6px 16px;
    background: rgba(43, 127, 255, 0.08);
    border-radius: 100px;
}

.section-dark .section-header .eyebrow {
    background: rgba(0, 207, 253, 0.12);
    color: var(--cyan);
}

.section-header h2 {
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 18px;
    line-height: 1.3;
}

.section-dark .section-header h2 {
    color: #fff;
}

.section-header p {
    font-size: 1.05rem;
    color: var(--text-muted);
    line-height: 1.8;
}

.section-dark .section-header p {
    color: rgba(255, 255, 255, 0.65);
}

/* ===== Header / Navigation ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-h);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: all 0.3s var(--ease);
}

.site-header.scrolled {
    box-shadow: var(--shadow-sm);
}

.header-inner {
    max-width: var(--container);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--navy-deep);
    letter-spacing: -0.02em;
}

.logo-mark {
    width: 38px;
    height: 38px;
    background: var(--grad-cyan);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.1rem;
    font-weight: 800;
    box-shadow: 0 4px 12px rgba(0, 207, 253, 0.35);
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-text .cn {
    font-size: 1.05rem;
    font-weight: 700;
}

.logo-text .en {
    font-size: 0.6rem;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

/* Nav */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-menu > li > a {
    display: block;
    padding: 8px 18px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-body);
    border-radius: 8px;
    transition: all 0.25s var(--ease);
    position: relative;
}

.nav-menu > li > a:hover,
.nav-menu > li > a.active {
    color: var(--blue-primary);
    background: rgba(43, 127, 255, 0.06);
}

.nav-cta {
    margin-left: 12px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 100px;
    border: none;
    cursor: pointer;
    transition: all 0.3s var(--ease);
    font-family: inherit;
    white-space: nowrap;
}

.btn-primary {
    background: var(--blue-primary);
    color: #fff;
    box-shadow: var(--shadow-blue);
}

.btn-primary:hover {
    background: var(--blue-bright);
    transform: translateY(-2px);
    box-shadow: 0 16px 48px rgba(43, 127, 255, 0.35);
}

.btn-outline {
    background: transparent;
    color: var(--blue-primary);
    border: 2px solid var(--blue-primary);
}

.btn-outline:hover {
    background: var(--blue-primary);
    color: #fff;
}

.btn-light {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
}

.btn-light:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-lg {
    padding: 16px 40px;
    font-size: 1.05rem;
}

/* Mobile menu toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--navy-deep);
    border-radius: 2px;
    transition: all 0.3s var(--ease);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ===== Hero (Homepage) ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--grad-hero);
    overflow: hidden;
    padding-top: var(--header-h);
}

/* Animated background orbs */
.hero::before,
.hero::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: floatOrb 12s ease-in-out infinite;
}

.hero::before {
    width: 500px;
    height: 500px;
    background: var(--cyan);
    top: -100px;
    right: -100px;
}

.hero::after {
    width: 400px;
    height: 400px;
    background: var(--blue-bright);
    bottom: -100px;
    left: -50px;
    animation-delay: -6s;
}

@keyframes floatOrb {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -40px) scale(1.1); }
}

/* Grid pattern overlay */
.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(0, 207, 253, 0.12);
    border: 1px solid rgba(0, 207, 253, 0.3);
    border-radius: 100px;
    color: var(--cyan);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    background: var(--cyan);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.hero h1 {
    font-size: 3.6rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero h1 .accent {
    background: var(--grad-cyan);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.75);
    max-width: 680px;
    line-height: 1.8;
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Hero stats bar */
.hero-stats {
    display: flex;
    gap: 48px;
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stat .num {
    font-size: 2.2rem;
    font-weight: 800;
    color: #fff;
    line-height: 1;
}

.hero-stat .num .unit {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--cyan);
}

.hero-stat .label {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.55);
    margin-top: 8px;
}

/* ===== Page Hero (inner pages) ===== */
.page-hero {
    background: var(--grad-hero);
    padding: calc(var(--header-h) + 80px) 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: var(--cyan);
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.2;
    top: -50px;
    right: 10%;
}

.page-hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
    position: relative;
    z-index: 2;
}

.page-hero p {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 640px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
    position: relative;
    z-index: 2;
}

.breadcrumb a:hover {
    color: var(--cyan);
}

/* ===== Three-Layer Architecture ===== */
.architecture {
    position: relative;
}

.arch-layer {
    border-radius: var(--radius-lg);
    padding: 40px;
    margin-bottom: 24px;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s var(--ease);
}

.arch-layer:hover {
    transform: translateY(-4px);
}

.arch-layer-top {
    background: linear-gradient(135deg, #0F2557 0%, #1B4FD7 100%);
    color: #fff;
}

.arch-layer-mid {
    background: linear-gradient(135deg, #ffffff 0%, #F0F6FF 100%);
    border: 1px solid var(--border-light);
}

.arch-layer-bottom {
    background: linear-gradient(135deg, #0A1A3A 0%, #1A2950 100%);
    color: #fff;
}

.arch-layer-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.arch-layer-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.arch-layer-top .arch-layer-icon {
    background: rgba(255, 255, 255, 0.15);
}

.arch-layer-mid .arch-layer-icon {
    background: var(--grad-cyan);
    color: #fff;
}

.arch-layer-bottom .arch-layer-icon {
    background: rgba(0, 207, 253, 0.15);
}

.arch-layer-title {
    font-size: 1.3rem;
    font-weight: 700;
}

.arch-layer-top .arch-layer-title,
.arch-layer-bottom .arch-layer-title {
    color: #fff;
}

.arch-layer-mid .arch-layer-title {
    color: var(--text-dark);
}

.arch-layer-desc {
    font-size: 0.95rem;
    margin-bottom: 24px;
    opacity: 0.8;
}

.arch-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.arch-card {
    padding: 20px;
    border-radius: var(--radius-md);
    transition: all 0.3s var(--ease);
    cursor: pointer;
}

.arch-layer-top .arch-card {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.arch-layer-top .arch-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-3px);
}

.arch-layer-mid .arch-card {
    background: #fff;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}

.arch-layer-mid .arch-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
    border-color: var(--blue-bright);
}

.arch-layer-bottom .arch-card {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.arch-layer-bottom .arch-card:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-3px);
}

.arch-card .icon {
    font-size: 1.8rem;
    margin-bottom: 12px;
}

.arch-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.arch-layer-top .arch-card h4,
.arch-layer-bottom .arch-card h4 {
    color: #fff;
}

.arch-layer-mid .arch-card h4 {
    color: var(--text-dark);
}

.arch-card p {
    font-size: 0.82rem;
    line-height: 1.6;
    opacity: 0.7;
}

/* ===== Solution Cards (detailed) ===== */
.sol-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
}

.sol-card {
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: all 0.35s var(--ease);
    position: relative;
    overflow: hidden;
}

.sol-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--grad-cyan);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s var(--ease);
}

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

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

.sol-card .sol-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(27, 79, 215, 0.08), rgba(0, 207, 253, 0.08));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 20px;
}

.sol-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.sol-card .sol-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 100px;
    margin-bottom: 16px;
}

.sol-card .sol-tag.tag-top { background: rgba(27, 79, 215, 0.1); color: var(--blue-primary); }
.sol-card .sol-tag.tag-mid { background: rgba(0, 200, 150, 0.1); color: var(--green); }
.sol-card .sol-tag.tag-bottom { background: rgba(108, 92, 231, 0.1); color: var(--purple); }

.sol-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

.sol-card .sol-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.sol-card .sol-features li {
    font-size: 0.8rem;
    color: var(--text-body);
    padding: 4px 12px;
    background: var(--bg-gray);
    border-radius: 6px;
}

/* ===== Stats Section ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.stat-box {
    text-align: center;
    padding: 32px 20px;
}

.stat-box .stat-num {
    font-size: 3rem;
    font-weight: 800;
    color: var(--blue-primary);
    line-height: 1;
}

.section-dark .stat-box .stat-num {
    color: var(--cyan);
}

.stat-box .stat-num .unit {
    font-size: 1.4rem;
}

.stat-box .stat-label {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-top: 12px;
}

.section-dark .stat-box .stat-label {
    color: rgba(255, 255, 255, 0.6);
}

/* ===== Feature / Highlight Cards ===== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.35s var(--ease);
    border: 1px solid var(--border-light);
}

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

.feature-card .feature-img {
    height: 200px;
    background: var(--grad-card);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    position: relative;
    overflow: hidden;
}

.feature-card .feature-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0,207,253,0.2), transparent);
}

.feature-card .feature-body {
    padding: 28px;
}

.feature-card .feature-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 6px;
    background: rgba(43, 127, 255, 0.08);
    color: var(--blue-primary);
    margin-bottom: 12px;
}

.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ===== Case Study Cards ===== */
.case-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.case-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-light);
    transition: all 0.35s var(--ease);
    display: flex;
    flex-direction: column;
}

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

.case-card .case-banner {
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: #fff;
    position: relative;
}

.case-card .case-banner::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent, rgba(0,0,0,0.2));
}

.case-card .case-body {
    padding: 28px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.case-card .case-industry {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--blue-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.case-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.case-card .case-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.7;
    flex: 1;
    margin-bottom: 20px;
}

.case-card .case-metrics {
    display: flex;
    gap: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border-light);
}

.case-card .case-metric .val {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--blue-primary);
}

.case-card .case-metric .lbl {
    font-size: 0.78rem;
    color: var(--text-light);
}

/* ===== News Cards ===== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.news-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-light);
    transition: all 0.35s var(--ease);
}

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

.news-card .news-banner {
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
}

.news-card .news-body {
    padding: 28px;
}

.news-card .news-date {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 8px;
}

.news-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ===== CTA Section ===== */
.cta-section {
    background: var(--grad-hero);
    text-align: center;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: var(--cyan);
    border-radius: 50%;
    filter: blur(150px);
    opacity: 0.15;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
}

.cta-section h2 {
    font-size: 2.4rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
    position: relative;
    z-index: 2;
}

.cta-section p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 36px;
    position: relative;
    z-index: 2;
}

.cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
}

/* ===== About Page ===== */
.about-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-intro-text h2 {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 24px;
    line-height: 1.3;
}

.about-intro-text p {
    font-size: 1rem;
    color: var(--text-body);
    line-height: 1.9;
    margin-bottom: 16px;
}

.about-intro-visual {
    height: 420px;
    border-radius: var(--radius-lg);
    background: var(--grad-card);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.about-intro-visual::before {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    background: var(--cyan);
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    top: -50px;
    right: -50px;
}

.about-intro-visual .visual-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
}

.about-intro-visual .visual-content .big-text {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 16px;
}

.about-intro-visual .visual-content .sub-text {
    font-size: 1.1rem;
    opacity: 0.8;
}

/* Vision/Mission/Values */
.vmv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.vmv-card {
    text-align: center;
    padding: 48px 32px;
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    transition: all 0.3s var(--ease);
}

.vmv-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: var(--cyan);
}

.vmv-card .vmv-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(27,79,215,0.08), rgba(0,207,253,0.08));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.vmv-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.vmv-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.8;
}

/* CEO Message */
.ceo-message {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 60px;
    box-shadow: var(--shadow-md);
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 48px;
    align-items: start;
}

.ceo-avatar {
    width: 280px;
    height: 280px;
    border-radius: var(--radius-lg);
    background: var(--grad-card);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 5rem;
    position: relative;
    overflow: hidden;
}

.ceo-avatar::after {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    background: var(--cyan);
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.25;
    bottom: -50px;
    right: -50px;
}

.ceo-message .ceo-info {
    text-align: center;
}

.ceo-message .ceo-info .ceo-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-top: 16px;
}

.ceo-message .ceo-info .ceo-title {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.ceo-message .ceo-text {
    font-size: 1.05rem;
    line-height: 2;
    color: var(--text-body);
}

.ceo-message .ceo-text p {
    margin-bottom: 16px;
}

.ceo-message .ceo-text .quote-mark {
    font-size: 3rem;
    color: var(--blue-bright);
    opacity: 0.2;
    line-height: 0;
    margin-bottom: 8px;
}

/* Timeline */
.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 80px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--blue-bright), var(--cyan));
}

.timeline-item {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
    position: relative;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-year {
    width: 80px;
    text-align: right;
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--blue-primary);
    flex-shrink: 0;
    padding-top: 4px;
}

.timeline-item::after {
    content: '';
    position: absolute;
    left: 74px;
    top: 10px;
    width: 14px;
    height: 14px;
    background: #fff;
    border: 3px solid var(--blue-bright);
    border-radius: 50%;
    z-index: 2;
}

.timeline-content {
    flex: 1;
    padding-left: 32px;
}

.timeline-content h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ===== Contact Page ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.contact-info-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 48px;
    box-shadow: var(--shadow-md);
}

.contact-info-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 32px;
}

.contact-detail {
    display: flex;
    gap: 16px;
    margin-bottom: 28px;
}

.contact-detail .ci-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(27,79,215,0.08), rgba(0,207,253,0.08));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.contact-detail .ci-text .ci-label {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 4px;
}

.contact-detail .ci-text .ci-value {
    font-size: 1rem;
    color: var(--text-dark);
    font-weight: 600;
}

/* Contact Form */
.contact-form {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 48px;
    box-shadow: var(--shadow-md);
}

.contact-form h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 32px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text-body);
    background: var(--bg-light);
    transition: all 0.25s var(--ease);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--blue-bright);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(43, 127, 255, 0.08);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* ===== Footer ===== */
.site-footer {
    background: #0A1428;
    color: rgba(255, 255, 255, 0.6);
    padding: 64px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .logo {
    color: #fff;
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.88rem;
    line-height: 1.8;
    max-width: 320px;
    margin-bottom: 24px;
}

.footer-brand .footer-contact {
    font-size: 0.85rem;
    line-height: 2;
}

.footer-brand .footer-contact a {
    color: rgba(255, 255, 255, 0.6);
}

.footer-brand .footer-contact a:hover {
    color: var(--cyan);
}

.footer-col h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.55);
    transition: color 0.25s var(--ease);
}

.footer-col ul li a:hover {
    color: var(--cyan);
}

.footer-bottom {
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom .footer-links {
    display: flex;
    gap: 24px;
}

.footer-bottom .footer-links a:hover {
    color: var(--cyan);
}

/* ===== Language Switcher ===== */
.lang-switch {
    display: flex;
    align-items: center;
    gap: 2px;
    margin-left: 8px;
    padding: 4px;
    background: var(--bg-gray);
    border-radius: 100px;
}

.lang-switch a {
    padding: 5px 12px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    border-radius: 100px;
    transition: all 0.25s var(--ease);
}

.lang-switch a:hover {
    color: var(--blue-primary);
}

.lang-switch a.active {
    background: var(--blue-primary);
    color: #fff;
}

@media (max-width: 768px) {
    .lang-switch {
        margin: 12px 0 0;
        justify-content: center;
    }
}

/* ===== Animations ===== */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero h1 { font-size: 2.8rem; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
    .about-intro { grid-template-columns: 1fr; }
    .about-intro-visual { height: 320px; }
    .ceo-message { grid-template-columns: 1fr; }
    .ceo-avatar { width: 200px; height: 200px; margin: 0 auto; font-size: 4rem; }
    .vmv-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        padding: 20px;
        gap: 0;
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        transition: transform 0.3s var(--ease);
        max-height: calc(100vh - var(--header-h));
        overflow-y: auto;
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .nav-menu > li > a {
        padding: 14px 16px;
        border-radius: 8px;
        margin-bottom: 2px;
    }

    .nav-cta {
        margin: 12px 0 0;
    }

    .nav-cta .btn {
        width: 100%;
    }

    .nav-toggle {
        display: flex;
    }

    .hero h1 { font-size: 2.2rem; }
    .hero-sub { font-size: 1.05rem; }
    .hero-stats { flex-wrap: wrap; gap: 24px; }

    .section-header h2 { font-size: 1.8rem; }

    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .stat-box .stat-num { font-size: 2.2rem; }

    .feature-grid,
    .news-grid,
    .case-grid,
    .sol-grid { grid-template-columns: 1fr; }

    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }

    .page-hero h1 { font-size: 2rem; }

    .section { padding: 56px 0; }
    .section-lg { padding: 64px 0; }

    .cta-section h2 { font-size: 1.8rem; }

    .form-row { grid-template-columns: 1fr; }

    .arch-cards { grid-template-columns: 1fr; }
}