/* === 重置与基础 === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #09090b;
    --surface: #18181b;
    --surface-elevated: #27272a;
    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.12);
    --text: #f4f4f5;
    --text-muted: #a1a1aa;
    --text-dim: #71717a;
    --accent: #0D9488;
    --accent-light: #22D3EE;
    --accent-glow: rgba(13, 148, 136, 0.35);
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    --font-sans: -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Courier New', monospace;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans), serif;
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* === 排版 === */
h1, h2, h3, h4 {
    font-weight: 700;
    letter-spacing: -0.02em;
}

p {
    color: var(--text-muted);
    line-height: 1.7;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mono {
    font-family: var(--font-mono), serif;
    font-weight: 500;
}

/* === 背景 === */
.bg-surface {
    background: var(--surface);
}

.bg-elevated {
    background: var(--surface-elevated);
}

.bg-srf {
    background: var(--surface);
}

.tech-bg {
    background: radial-gradient(ellipse at 20% 10%, rgba(13, 148, 136, 0.10) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 90%, rgba(34, 211, 238, 0.06) 0%, transparent 50%),
    var(--bg);
}

.dot-grid {
    background-size: 40px 40px;
}

/* === 导航栏 === */
.nav-container {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 50;
    height: 68px;
    border-bottom: 1px solid transparent;
    transition: background 0.3s ease, border-color 0.3s ease;
}

.nav-container.scrolled {
    background: rgba(9, 9, 11, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom-color: var(--border);
}

.nav-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
    font-size: 1.125rem;
    letter-spacing: -0.01em;
}

.nav-logo-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: #fff;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--accent);
    transition: width 0.25s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    padding: 0.5rem;
}

/* === 按钮 === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-full);
    font-family: var(--font-sans), serif;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    border: none;
    white-space: nowrap;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    color: #fff;
    box-shadow: 0 4px 20px rgba(13, 148, 136, 0.25);
}

.btn-primary:hover {
    box-shadow: 0 8px 32px rgba(13, 148, 136, 0.4);
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border-strong);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
}

/* === Logo 变体 === */
.logo-narrow {
    width: 120px;
    height: 39px;
    object-fit: contain;
}

/* === 形状与胶囊框 === */
.pill-box {
    width: 48px;
    height: 48px;
    background: rgba(13, 148, 136, 0.12);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.pill-box-sm {
    width: 40px;
    height: 40px;
    background: rgba(13, 148, 136, 0.12);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* === 图标盒子（统一版本） === */
.icon-box {
    width: 40px;
    height: 40px;
    background: rgba(13, 148, 136, 0.12);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-box-lg {
    width: 48px;
    height: 48px;
    background: rgba(13, 148, 136, 0.12);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* === 列表样式 === */
.dot-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.dot-list li,
.dot-list-li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.95rem;
}

.dot-list .dot,
.dot-list-li .dot {
    color: var(--accent);
    font-weight: 700;
    flex-shrink: 0;
}

.checklist {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
    margin-bottom: 2rem;
}

.checklist li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.95rem;
}

.adv-checklist {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.adv-checklist li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.95rem;
}


/* === 通用间距工具类 === */
.ct-mb4 {
    margin-bottom: 1.25rem;
}

.ct-mb15 {
    margin-bottom: 1.5rem;
}

.mb-2 {
    margin-bottom: 0.5rem;
}

.mb-4 {
    margin-bottom: 1rem;
}

.mt-2 {
    margin-top: 0.5rem;
}

.mt-auto {
    margin-top: auto;
}

.text-left {
    text-align: left;
}

/* === 通用文本工具类 === */
.t-muted {
    color: var(--text-muted);
}

.t-muted-sm {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.ct-text-sm {
    font-size: 0.9rem;
}

.ct-body {
    font-size: 0.95rem;
    margin: 0;
}

.footnote {
    font-size: 0.85rem;
}

.text-center {
    text-align: center;
}

.max-40ch {
    max-width: 40ch;
}

/* === 通用网格布局 === */
.ct-grid-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.ct-grid-quad {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.three-col-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

/* === 通用卡片样式 === */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: border-color 0.3s ease, transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.card:hover {
    border-color: var(--border-strong);
    transform: translateY(-2px);
}

.card-grad {
    padding: 2rem;
    background: linear-gradient(135deg, var(--surface), rgba(13, 148, 136, 0.06));
}

.ct-p-2 {
    padding: 2rem;
}

.ct-pain {
    padding: 1.75rem;
    text-align: center;
}

/* === 标题样式 === */
.ct-h3-lg {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    line-height: 1.15;
    margin-bottom: 1rem;
}

.ct-h3-md {
    font-size: 1.35rem;
    margin-bottom: 0.5rem;
}

.ct-h3-sm {
    font-size: 1.1rem;
    margin: 0.5rem 0;
}

.headline {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    line-height: 1.15;
    margin-bottom: 1rem;
}

.h-section {
    font-size: clamp(2.5rem, 5vw, 3.75rem);
    line-height: 1.08;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
}

/* === 功能标题 === */
.feat-label {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--accent);
}

.feat-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.feat-title-alt {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--accent-light);
}

.feat-title-base {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.feat-bold {
    font-size: 1rem;
    font-weight: 600;
}

.feat-bold-sm {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.feat-sub {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

/* === 统计数字 === */
.ct-stat {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text);
}

.ct-stat-sub {
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

.mono-accent {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-light);
}

/* === PILLOW 框架 === */
.pillow {
    width: 100%;
    max-width: 420px;
    aspect-ratio: 4 / 3;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.pillow-inset {
    position: absolute;
    inset: 0;
}

/* Pillow 背景渐变（统一管理） */
.pillow-bg-default {
    background: radial-gradient(ellipse at 50% 50%, rgba(13, 148, 136, 0.1) 0%, transparent 60%);
}

.pillow-bg-1 {
    background: radial-gradient(ellipse at 30% 50%, rgba(13, 148, 136, 0.1) 0%, transparent 60%);
}

.pillow-bg-2 {
    background: radial-gradient(ellipse at 70% 50%, rgba(13, 148, 136, 0.08) 0%, transparent 60%);
}

.pillow-bg-3 {
    background: radial-gradient(ellipse at 60% 40%, rgba(13, 148, 136, 0.1) 0%, transparent 60%);
}

.pillow-bg-4 {
    background: radial-gradient(ellipse at 50% 50%, rgba(13, 148, 136, 0.08) 0%, transparent 60%);
}

.pillow-bg-adv {
    background: radial-gradient(ellipse at 50% 50%, rgba(13, 148, 136, 0.08) 0%, transparent 60%);
}

.pillow-bg-adv-left {
    background: radial-gradient(ellipse at 30% 60%, rgba(13, 148, 136, 0.06) 0%, transparent 60%);
}

.pillow-bg-adv-right {
    background: radial-gradient(ellipse at 70% 40%, rgba(13, 148, 136, 0.08) 0%, transparent 60%);
}

.pillow-bg-adv-center {
    background: radial-gradient(ellipse at 50% 50%, rgba(13, 148, 136, 0.06) 0%, transparent 60%);
}

/* === 表单元素 === */
.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    color: var(--text);
    font-family: var(--font-sans), serif;
    font-size: 0.95rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

.form-input::placeholder {
    color: var(--text-dim);
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text);
}

/* === 区块间距 === */
.section {
    padding: 7.5rem 0;
}

.section-tight {
    padding: 5rem 0;
}

.section-header {
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.section-header p {
    font-size: 1.1rem;
    max-width: 48ch;
    margin-top: 1rem;
}

/* === 容器 === */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.container-narrow {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* === EYEBROW === */
.eyebrow {
    font-family: var(--font-mono), serif;
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent-light);
    margin-bottom: 1rem;
}

.text-overview {
    font-size: 1.1rem;
    line-height: 1.7;
    max-width: 48ch;
}

.feature-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.75rem;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--accent-light);
    color: var(--accent-light);
}

.btn-outline:hover {
    background: rgba(34, 211, 238, 0.08);
    border-color: var(--accent-light);
    transform: translateY(-1px);
}

.about-pillow-bg {
    background: radial-gradient(ellipse at 50% 50%, rgba(13, 148, 136, 0.1) 0%, transparent 60%);
}

.pillow img {
    max-width: 100%;
    height: auto;
    object-fit: contain;
    position: relative;
    z-index: 1;
}

.pillow-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    position: relative;
    z-index: 1;
}

/* === 辅助布局类 === */
.flex-center {
    display: flex;
    justify-content: center;
}

.ct-flex {
    display: flex;
}

.ct-flex-gap {
    display: flex;
    gap: 1rem;
}

.btn-group {
    display: flex;
    gap: 0.75rem;
}

.order-1 {
    order: 1;
}

.order-md-1 {
    order: 1;
}

/* === SCROLL REVEAL === */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 {
    transition-delay: 0.08s;
}

.reveal-delay-2 {
    transition-delay: 0.16s;
}

.reveal-delay-3 {
    transition-delay: 0.24s;
}

.reveal-delay-4 {
    transition-delay: 0.32s;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}

/* === FOOTER === */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 5rem 0 2.5rem;
}

.footer-logo {
    display: flex;
    margin-bottom: 1rem;
}

.footer-desc {
    max-width: 32ch;
}

.footer-meta {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
}

.footer-col h4 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-dim);
    margin-bottom: 1.25rem;
    font-weight: 600;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 0.625rem;
}

.footer-col a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.footer-col a:hover {
    color: var(--text);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    font-size: 0.85rem;
    color: var(--text-dim);
}

/* === 页面特定 === */
.products-hero,
.advantages-hero,
.about-hero,
.contact-hero {
    padding: 9rem 0 4rem;
}

.products-hero h1,
.advantages-hero h1,
.about-hero h1,
.contact-hero h1 {
    font-size: clamp(2.25rem, 4vw, 3.25rem);
    line-height: 1.1;
}

.products-hero p,
.advantages-hero p,
.about-hero p,
.contact-hero p {
    font-size: 1.1rem;
    max-width: 48ch;
    margin-top: 1rem;
}

.vision-section {
    padding-top: 2rem;
}

.vision-icon-wrap {
    margin-bottom: 1rem;
}

.cta-btn-row {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-group-center {
    justify-content: center;
}

/* 补充样式确保愿景区域与整体风格统一 */
.vision-quote {
    background: linear-gradient(135deg, rgba(34, 211, 238, 0.05) 0%, rgba(34, 211, 238, 0.02) 100%);
    border-radius: 32px;
    padding: 2rem;
    text-align: center;
    margin-top: 3rem;
}

.vision-quote p {
    font-size: 1.2rem;
    line-height: 1.5;
    color: var(--text-muted, #e2e8f0);
    max-width: 80%;
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 768px) {
    .vision-quote p {
        font-size: 1rem;
        max-width: 95%;
    }

    .vision-quote {
        padding: 1.5rem;
    }
}

.badge-new {
    background: rgba(34, 211, 238, 0.15);
    color: #22D3EE;
    font-size: 0.7rem;
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    margin-left: 0.5rem;
    vertical-align: middle;
}

/* 核心速览网格 */
.stats-showcase {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

.stat-card {
    background: linear-gradient(135deg, var(--surface), rgba(13, 148, 136, 0.04));
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.stat-card:hover {
    border-color: rgba(34, 211, 238, 0.3);
    transform: translateY(-4px);
}

.stat-number {
    font-size: 2.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* 优势卡片网格 */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.advantage-card {
    padding: 2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
}

.advantage-card:hover {
    border-color: rgba(34, 211, 238, 0.3);
    transform: translateY(-4px);
}

.advantage-icon {
    width: 48px;
    height: 48px;
    background: rgba(13, 148, 136, 0.12);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
}

.advantage-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.advantage-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* 服务流程 */
.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.process-step {
    text-align: center;
}

.step-number {
    width: 40px;
    height: 40px;
    background: rgba(13, 148, 136, 0.15);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-weight: 700;
    color: var(--accent-light);
}

.step-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.step-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* 案例卡片 */
.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.case-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.case-card:hover {
    border-color: rgba(34, 211, 238, 0.3);
    transform: translateY(-2px);
}

.case-industry {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent-light);
    margin-bottom: 0.5rem;
}

.case-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.case-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* 响应式 */
@media (max-width: 1024px) {
    .advantages-grid,
    .process-grid,
    .case-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats-showcase {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .advantages-grid,
    .process-grid,
    .case-grid,
    .stats-showcase {
        grid-template-columns: 1fr;
    }
}

/* === 首页特定样式 === */
.hero-section {
    padding-top: 68px;
    min-height: 100dvh;
    display: flex;
    align-items: center;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text {
    margin-bottom: 2rem;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-graphic {
    width: 100%;
    max-width: 480px;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-graphic img {
    max-width: 100%;
    height: auto;
    object-fit: contain;
}

.pain-header {
    text-align: center;
    margin-bottom: 4rem;
}

.pain-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    line-height: 1.15;
    margin-bottom: 1rem;
}

.pain-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
}

.pain-card p {
    font-size: 0.95rem;
    margin: 0;
}

.pain-card {
    padding: 1.75rem;
    text-align: center;
}

.pillars-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.pillar-large-card {
    grid-row: span 2;
    padding: 3rem;
}

.pillar-title {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.pillar-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.cta-container {
    text-align: center;
}

.cta-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    margin-bottom: 1rem;
}

.cta-desc {
    max-width: 40ch;
    margin: 0 auto 2rem;
}

/* === products 页面特定样式 === */
.two-col-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: start;
}

.feature-desc {
    margin-bottom: 1.5rem;
}

.icon-center {
    width: 40px;
    height: 40px;
    background: rgba(13, 148, 136, 0.12);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.feature-card-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.wechat-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.products-cta {
    text-align: center;
}

.products-cta h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    margin-bottom: 1rem;
}

.products-cta p {
    max-width: 40ch;
    margin: 0 auto 2rem;
}

/* === advantages 页面特定样式 === */
.advantages-cta {
    text-align: center;
}

.advantages-cta h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    margin-bottom: 1rem;
}

.advantages-cta p {
    max-width: 40ch;
    margin: 0 auto 2rem;
}

/* === about 页面特定样式 === */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.about-title {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    line-height: 1.15;
    margin-bottom: 1.25rem;
}

.milestones-header {
    margin-bottom: 4rem;
}

.milestones-header h2 {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
}

.milestone-year {
    margin-bottom: 0.5rem;
}

.milestone-card {
    padding: 1.75rem;
}

.values-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 2rem;
}

/* 使命愿景双卡片 */
.mission-vision-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 3rem;
}

.mission-card, .vision-card {
    background: linear-gradient(135deg, var(--surface), rgba(13, 148, 136, 0.04));
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.mission-card:hover, .vision-card:hover {
    border-color: rgba(34, 211, 238, 0.3);
    transform: translateY(-4px);
}

.mission-icon, .vision-icon {
    width: 64px;
    height: 64px;
    background: rgba(13, 148, 136, 0.12);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
}

.mission-title, .vision-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.mission-text, .vision-text {
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* 核心价值观 */
.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.value-item {
    text-align: center;
    padding: 2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
}

.value-item:hover {
    border-color: rgba(34, 211, 238, 0.3);
    transform: translateY(-4px);
}

.value-icon {
    width: 56px;
    height: 56px;
    background: rgba(13, 148, 136, 0.12);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.value-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.value-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.about-cta {
    text-align: center;
}

.about-cta h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    margin-bottom: 1rem;
}

.about-cta p {
    max-width: 40ch;
    margin: 0 auto 2rem;
}

/* === contact 页面特定样式 === */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 5rem;
}

.contact-info-title {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    line-height: 1.15;
    margin-bottom: 2rem;
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-info-item {
    display: flex;
    gap: 1rem;
}

.contact-icon {
    justify-content: center;
    flex-shrink: 0;
}

.contact-email-link {
    text-decoration: none;
    font-size: 0.95rem;
}

.contact-card {
    padding: 2.5rem;
}

.contact-card-title {
    font-size: 1.35rem;
    margin-bottom: 2rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

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

.contact-textarea {
    resize: vertical;
}

/* === 响应式 === */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

    .two-col-grid,
    .wechat-grid,
    .about-grid,
    .contact-grid {
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 68px;
        left: 0;
        width: 100%;
        background: rgba(9, 9, 11, 0.98);
        backdrop-filter: blur(20px);
        padding: 1.5rem 2rem;
        gap: 1.25rem;
        border-bottom: 1px solid var(--border);
    }

    .section {
        padding: 4rem 0;
    }

    .section-tight {
        padding: 3rem 0;
    }

    .site-footer {
        padding: 3rem 0 1.5rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        margin-bottom: 2rem;
    }

    .footer-col {
        text-align: center;
    }

    .footer-col:nth-child(2),
    .footer-col:nth-child(3) {
        display: none;
    }

    .footer-col:first-child {
        padding-bottom: 0;
    }

    .footer-col:first-child p {
        margin: 0 auto;
    }

    .footer-col:first-child .nav-logo {
        justify-content: center;
    }

    .footer-col h4 {
        margin-bottom: 0.75rem;
    }

    .footer-col li {
        margin-bottom: 0.5rem;
    }

    .footer-col a {
        display: inline-block;
        padding: 0.25rem 0;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
        padding-top: 1.25rem;
    }

    .container, .container-narrow {
        padding: 0 1.25rem;
    }

    /* 首页响应式 */
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .pain-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .pillars-grid {
        grid-template-columns: 1fr;
    }

    .pillar-large-card {
        grid-row: auto;
    }

    .capabilities-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    /* 通用响应式 */
    .ct-grid-split,
    .two-col-grid,
    .wechat-grid,
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .three-col-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .values-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .mission-vision-grid {
        grid-template-columns: 1fr;
    }

    .ct-grid-quad {
        grid-template-columns: repeat(2, 1fr);
    }

    /* 页面特定响应式 */
    .products-hero,
    .advantages-hero,
    .about-hero,
    .contact-hero {
        padding: 6rem 0 3rem;
        text-align: center;
    }

    .wechat-grid .reveal:first-child {
        order: 0;
    }

    .order-md-1,
    .order-1 {
        order: 0;
    }

    .contact-info-list {
        text-align: left;
    }

}

@media (max-width: 480px) {
    .pain-grid,
    .capabilities-grid,
    .stats-grid,
    .three-col-grid,
    .values-grid,
    .ct-grid-quad {
        grid-template-columns: 1fr;
    }

    .btn-group {
        flex-direction: column;
        align-items: center;
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
        padding: 0.875rem 1.75rem;
    }

    .pillar-large-card {
        padding: 2rem;
    }

    .hero-graphic {
        max-width: 280px;
    }

    .nav-links.open a {
        padding: 0.75rem 0;
    }

    .section-header p {
        font-size: 1rem;
    }

    .card-grad {
        padding: 1.5rem;
    }
}