/* ============================================================
 * 铿柱官网 · 首页样式表（v1）
 * 设计系统：浅色科技风（Light Tech），对齐 miniprogram DESIGN.md v1.3
 * 零打包工具 · 全部 CSS 变量驱动 · 零硬编码色值
 *
 * 【架构红线遵守】
 * - 全部 ::before 伪元素做强调条，无 border-left
 * - 全部颜色走 var(--color-*)，零硬编码
 * - 按钮 hover 用 opacity 变化，无 scale 变形
 * ============================================================ */

/* ========== 1. 设计系统 Token（40+ 变量） ========== */
:root {
    /* 主色（与 miniprogram/app.wxss v2.3 一致） */
    --color-primary: #1E2937;
    --color-accent: #0891B2;
    --color-bg: #F8FAFC;
    --color-surface: #FFFFFF;
    --color-border: #D1D5DB;
    --color-muted: #64748B;
    --color-subtle: #9CA3AF;
    --color-text-inverse: #FFFFFF;

    /* 语义状态色 */
    --status-critical: #EF4444;
    --status-critical-bg: #FEE2E2;
    --status-process: #0891B2;
    --status-process-bg: rgba(8, 145, 178, 0.08);
    --status-ok: #10B981;
    --status-ok-bg: #D1FAE5;
    --status-warn: #D97706;
    --status-neutral: #64748B;
    --status-neutral-bg: #F1F5F9;

    /* Hero 暗色区独立变量 */
    --hero-bg: #0F172A;
    --hero-text: #F8FAFC;
    --hero-muted: #94A3B8;

    /* Logo 渐变 */
    --hero-logo-gradient: linear-gradient(135deg, var(--color-accent), var(--status-ok));

    /* 间距 */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 48px;

    /* 字号 */
    --font-hero: 48px;
    --font-h2: 32px;
    --font-h3: 20px;
    --font-body: 15px;
    --font-small: 13px;

    /* 圆角 */
    --radius-card: 12px;
    --radius-btn: 8px;
    --radius-pill: 6px;

    /* 阴影 */
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-card-hover: 0 10px 25px rgba(0, 0, 0, 0.08);
    --shadow-hero-glow: 0 0 60px rgba(8, 145, 178, 0.15);

    /* 容器宽度 */
    --container-max: 1200px;
}

/* ========== 2. Reset / 基础 ========== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: var(--font-body);
    line-height: 1.6;
    color: var(--color-primary);
    background: var(--color-bg);
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

ul,
ol {
    list-style: none;
}

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

/* ========== 3. 容器 ========== */
.site-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ========== 4. 按钮系统 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: var(--radius-btn);
    font-weight: 600;
    font-size: var(--font-body);
    line-height: 1.4;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1.5px solid transparent;
    white-space: nowrap;
}

.btn:hover {
    opacity: 0.85;
}

.btn:active {
    opacity: 0.75;
}

.btn--primary {
    background: var(--color-accent);
    color: var(--color-text-inverse);
    border-color: var(--color-accent);
}

.btn--primary:hover {
    background: #067A96;
    border-color: #067A96;
}

.btn--ghost {
    background: transparent;
    color: var(--hero-text);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn--ghost:hover {
    border-color: rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.05);
}

.btn--lg {
    padding: 14px 32px;
    font-size: 16px;
}

/* ========== 5. 导航栏 ========== */
.site-navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 72px;
    background: transparent;
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

.site-navbar.is-scrolled {
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

.site-navbar__inner {
    display: flex;
    align-items: center;
    height: 100%;
    gap: var(--space-lg);
}

.site-navbar__brand {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.site-navbar__logo {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    object-fit: contain;
    background: var(--color-surface);
    padding: 2px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.site-navbar__brand-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--hero-text);
    transition: color 0.3s ease;
}

.is-scrolled .site-navbar__brand-text {
    color: var(--color-primary);
}

.site-navbar__brand-accent {
    color: var(--color-accent);
}

.site-navbar__menu {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
}

.site-navbar__link {
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.75);
    border-radius: 6px;
    transition: all 0.2s ease;
    position: relative;
}

/* Hero 装饰齿轮定位 */
.site-hero__gear {
    position: absolute;
    z-index: 2;
    pointer-events: none;
    opacity: 0.8;
}

.site-hero__gear--1 {
    top: 15%;
    right: 8%;
    width: 120px;
    height: 120px;
    animation: gearSpin 30s linear infinite;
}

.site-hero__gear--2 {
    bottom: 25%;
    left: 5%;
    width: 80px;
    height: 80px;
    animation: gearSpin 25s linear infinite reverse;
}

@keyframes gearSpin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* ========== About 区图片 ========== */
.about-gallery {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    grid-area: gallery;
}

.about-gallery__img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius-card);
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.about-gallery__img:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.is-scrolled .site-navbar__link {
    color: var(--color-muted);
}

.site-navbar__link:hover {
    color: var(--hero-text);
    background: rgba(255, 255, 255, 0.08);
}

.is-scrolled .site-navbar__link:hover {
    color: var(--color-primary);
    background: var(--status-neutral-bg);
}

.site-navbar__link.is-active {
    color: var(--hero-text);
    font-weight: 600;
}

.is-scrolled .site-navbar__link.is-active {
    color: var(--color-accent);
}

.site-navbar__link.is-active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 1px;
}

.site-navbar__cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 20px;
    background: var(--color-accent);
    color: var(--color-text-inverse);
    border-radius: var(--radius-btn);
    font-size: 14px;
    font-weight: 600;
    transition: opacity 0.2s ease;
    flex-shrink: 0;
}

.site-navbar__cta:hover {
    opacity: 0.85;
}

.site-navbar__login {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    border-radius: var(--radius-btn);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: rgba(255, 255, 255, 0.85);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.site-navbar__login:hover {
    background: rgba(255, 255, 255, 0.08);
}

.is-scrolled .site-navbar__login {
    color: var(--color-primary);
    border-color: var(--color-border);
}

.is-scrolled .site-navbar__login:hover {
    background: var(--status-neutral-bg);
}

.site-navbar__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    flex-direction: column;
    gap: 4px;
}

.site-navbar__toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--hero-text);
    border-radius: 1px;
    transition: 0.3s ease;
}

.is-scrolled .site-navbar__toggle span {
    background: var(--color-primary);
}

/* ========== 6. Section 通用 ========== */
section[id] {
    scroll-margin-top: 62px;
}

.site-section {
    padding: 80px 0;
}


.site-section--dark {
    background: var(--hero-bg);
    color: var(--hero-text);
}

.site-section--dark .section-header__title {
    color: var(--hero-text);
}

.site-section--dark .section-header__desc {
    color: var(--hero-muted);
}

/* ========== 7. Section Header ========== */
.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-header__bar {
    display: block;
    width: 40px;
    height: 4px;
    background: var(--color-accent);
    border-radius: 2px;
    margin: 0 auto 16px;
}

.section-header__title {
    font-size: var(--font-h2);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 12px;
    line-height: 1.3;
}

.section-header__desc {
    font-size: 16px;
    color: var(--color-muted);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ========== 8. Hero 区 ========== */
.site-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--hero-bg);
    overflow: hidden;
}

.site-hero__canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.site-hero__overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 20% 50%, rgba(8, 145, 178, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(16, 185, 129, 0.05) 0%, transparent 50%);
    z-index: 2;
    pointer-events: none;
}

.site-hero__body {
    position: relative;
    z-index: 3;
    width: 100%;
    padding-top: 72px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    justify-content: center;
}

.site-hero__content {
    max-width: 720px;
}

.site-hero__badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(8, 145, 178, 0.12);
    border: 1px solid rgba(8, 145, 178, 0.25);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: 24px;
    letter-spacing: 0.3px;
}

.site-hero__title {
    font-size: var(--font-hero);
    font-weight: 800;
    color: var(--hero-text);
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.site-hero__title-accent {
    background: linear-gradient(135deg, var(--color-accent), #06B6D4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.site-hero__subtitle {
    font-size: 18px;
    color: var(--hero-muted);
    line-height: 1.7;
    margin-bottom: 36px;
    max-width: 540px;
}

.site-hero__actions {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 64px;
}

.site-hero__trust {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 24px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    margin-top: auto;
}

.site-hero__trust-item {
    display: flex;
    align-items: baseline;
    gap: 6px;
    flex-wrap: wrap;
}

.site-hero__trust-num {
    font-family: 'Inter', ui-monospace, monospace;
    font-size: 28px;
    font-weight: 800;
    color: var(--hero-text);
    font-variant-numeric: tabular-nums;
}

.site-hero__trust-unit {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-accent);
}

.site-hero__trust-label {
    width: 100%;
    font-size: 13px;
    color: var(--hero-muted);
}

.site-hero__trust-divider {
    width: 1px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    flex-shrink: 0;
}

/* ========== 9. 数据统计区 ========== */
.site-stats {
    padding: 48px 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.site-stats__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.stat-card {
    text-align: center;
    padding: 24px 16px;
    position: relative;
}

.stat-card+.stat-card::before {
    content: '';
    position: absolute;
    left: -16px;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 48px;
    background: var(--color-border);
}

.stat-card__value {
    margin-bottom: 12px;
}

.stat-card__num {
    font-family: 'Inter', ui-monospace, monospace;
    font-size: 42px;
    font-weight: 800;
    color: var(--color-accent);
    font-variant-numeric: tabular-nums;
    line-height: 1;
}

.stat-card__title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 6px;
}

.stat-card__desc {
    font-size: 13px;
    color: var(--color-muted);
    line-height: 1.5;
}

/* ========== 10. 业务能力三支柱 ========== */
.caps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.cap-card {
    position: relative;
    background: var(--color-surface);
    border-radius: var(--radius-card);
    padding: 36px 28px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
        box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.cap-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--color-accent);
    border-radius: 0 2px 2px 0;
}

.cap-card--featured {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 1px rgba(8, 145, 178, 0.15), var(--shadow-card);
}

.cap-card--featured:hover {
    box-shadow: 0 0 0 1px rgba(8, 145, 178, 0.2), var(--shadow-card-hover);
}

.cap-card__badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 3px 10px;
    background: var(--status-process-bg);
    color: var(--color-accent);
    font-size: 11px;
    font-weight: 600;
    border-radius: 10px;
}

.cap-card__icon-wrap {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: var(--status-process-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.cap-card__title {
    font-size: var(--font-h3);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.cap-card__subtitle {
    font-size: 14px;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: 16px;
}

.cap-card__features {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.cap-card__features li {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.5;
    padding-left: 16px;
    position: relative;
}

.cap-card__features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-accent);
    opacity: 0.4;
}

.cap-card__link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 16px;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-accent);
    transition: gap 0.2s ease;
}

.cap-card__link:hover {
    gap: 8px;
}

/* ========== 11. 全流程时间轴 ========== */
.site-flow {
    padding: 80px 0;
}

.flow-track {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    flex-wrap: wrap;
}

.flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 20px 16px;
    transition: all 0.2s ease;
    border-radius: var(--radius-card);
    cursor: default;
}

.flow-step:hover {
    background: rgba(8, 145, 178, 0.06);
}

.flow-step:hover .flow-step__icon {
    background: var(--color-accent);
    color: white;
    transform: scale(1.1);
}

.flow-step__icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: rgba(8, 145, 178, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    transition: all 0.3s ease;
}

.flow-step__label {
    font-size: 14px;
    font-weight: 600;
    color: var(--hero-text);
}

.flow-arrow {
    color: var(--hero-muted);
    opacity: 0.4;
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.site-flow__footnote {
    text-align: center;
    margin-top: 40px;
    font-size: 14px;
    color: var(--hero-muted);
    opacity: 0.7;
}

/* ========== 12. CIMP 平台能力（2×2 网格） ========== */
.platform-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.platform-card {
    position: relative;
    background: var(--color-surface);
    border-radius: var(--radius-card);
    padding: 36px 32px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.platform-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-card-hover);
}

.platform-card__bar {
    display: block;
    width: 32px;
    height: 3px;
    background: var(--color-accent);
    border-radius: 2px;
    margin-bottom: 20px;
}

.platform-card__icon {
    margin-bottom: 16px;
}

.platform-card__title {
    font-size: var(--font-h3);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.platform-card__desc {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.7;
}

/* ========== 13. 工艺路由引擎 ========== */
.site-engine {
    padding: 80px 0;
}

.engine-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.engine-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 40px 32px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-card);
}

.engine-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px 24px;
    border-radius: var(--radius-card);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.engine-node--current {
    border-color: var(--color-accent);
    background: rgba(8, 145, 178, 0.08);
}

.engine-node__dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-accent);
    box-shadow: 0 0 12px rgba(8, 145, 178, 0.4);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.6;
        transform: scale(0.9);
    }
}

.engine-node__label {
    font-size: 15px;
    font-weight: 600;
    color: var(--hero-text);
}

.engine-node__sub {
    font-size: 13px;
    color: var(--hero-muted);
}

.engine-node--decision {
    padding: 12px 28px;
    background: rgba(16, 185, 129, 0.08);
    border-color: rgba(16, 185, 129, 0.2);
    flex-direction: row;
    gap: 10px;
}

.engine-node__icon {
    color: var(--status-ok);
}

.engine-connector {
    color: var(--hero-muted);
    opacity: 0.5;
}

.engine-branches {
    display: flex;
    gap: 16px;
    width: 100%;
    margin-top: 8px;
}

.engine-branch {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.engine-branch__line {
    width: 1px;
    height: 24px;
    background: rgba(255, 255, 255, 0.15);
}

.engine-branch__icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.engine-branch__icon--a {
    background: rgba(8, 145, 178, 0.15);
    color: var(--color-accent);
}

.engine-branch__icon--b {
    background: rgba(217, 119, 6, 0.15);
    color: var(--status-warn);
}

.engine-branch__icon--c {
    background: rgba(16, 185, 129, 0.15);
    color: var(--status-ok);
}

.engine-branch__card {
    text-align: center;
    padding: 16px 12px;
    border-radius: var(--radius-card);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    width: 100%;
}

.engine-branch__tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 700;
    margin-bottom: 8px;
}

.engine-branch__tag--a {
    background: rgba(8, 145, 178, 0.15);
    color: var(--color-accent);
}

.engine-branch__tag--b {
    background: rgba(217, 119, 6, 0.15);
    color: var(--status-warn);
}

.engine-branch__tag--c {
    background: rgba(16, 185, 129, 0.15);
    color: var(--status-ok);
}

.engine-branch__title {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--hero-text);
    margin-bottom: 4px;
}

.engine-branch__desc {
    font-size: 12px;
    color: var(--hero-muted);
}

.engine-info__title {
    font-size: var(--font-h3);
    font-weight: 700;
    color: var(--hero-text);
    margin-bottom: 24px;
}

.engine-info__list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 32px;
}

.engine-info__list li {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.engine-info__list strong {
    font-size: 16px;
    font-weight: 600;
    color: var(--hero-text);
}

.engine-info__list span {
    font-size: 14px;
    color: var(--hero-muted);
    line-height: 1.7;
}

/* ========== 14. 角色矩阵 ========== */
.roles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.role-card {
    position: relative;
    background: var(--color-surface);
    border-radius: var(--radius-card);
    padding: 28px 24px;
    text-align: center;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.role-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-card-hover);
}

.role-card__bar {
    display: block;
    width: 28px;
    height: 3px;
    background: var(--color-accent);
    border-radius: 2px;
    margin: 0 auto 16px;
}

.role-card__icon {
    font-size: 32px;
    margin-bottom: 12px;
    line-height: 1;
}

.role-card__title {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 6px;
}

.role-card__desc {
    font-size: 13px;
    color: var(--color-muted);
    line-height: 1.5;
}

/* ========== 15. 关于我们 ========== */
.site-about {
    padding: 80px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    grid-template-areas:
        "text    connect"
        "gallery gallery";
    gap: 30px;
    align-items: start;
}

.about-text {
    grid-area: text;
}

.about-connect {
    grid-area: connect;
}


.about-text__lead {
    font-size: 18px;
    font-weight: 600;
    color: var(--hero-text);
    line-height: 1.7;
    margin-bottom: 20px;
}

.about-text p {
    font-size: 15px;
    color: var(--hero-muted);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-text__quote {
    margin: 18px 0;
    padding: 14px 24px;
    border-left: 3px solid var(--color-accent);
    font-size: 16px;
    font-weight: 500;
    color: var(--hero-text);
    font-style: italic;
    line-height: 1.6;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 0 8px 8px 0;
}

.about-connect__card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-card);
    padding: 32px;
}

.about-connect__card h4 {
    font-size: var(--font-h3);
    font-weight: 700;
    color: var(--hero-text);
    margin-bottom: 20px;
}

.about-connect__list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.about-connect__list dt {
    font-size: 12px;
    color: var(--hero-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}

.about-connect__list dd {
    font-size: 14px;
    color: var(--hero-text);
    line-height: 1.6;
}

.about-connect__list a {
    color: var(--color-accent);
    font-weight: 600;
}

.about-connect__list a:hover {
    text-decoration: underline;
}

/* ========== 16. Footer ========== */
.site-footer {
    background: var(--hero-bg);
    color: var(--hero-text);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.site-footer__inner {
    display: grid;
    grid-template-columns: 1fr 1fr 1.2fr;
    gap: 48px;
    padding: 60px 0;
}

.site-footer__logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.site-footer__logo-mark {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    object-fit: contain;
    background: var(--color-surface);
    padding: 2px;
}

.site-footer__desc {
    font-size: 14px;
    color: var(--hero-muted);
    line-height: 1.7;
    margin-bottom: 16px;
}

.site-footer__contact {
    font-size: 14px;
    color: var(--hero-muted);
}

.site-footer__col-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--hero-text);
    margin-bottom: 20px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.site-footer__link-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.site-footer__link-list a {
    font-size: 14px;
    color: var(--hero-muted);
    transition: color 0.2s ease;
}

.site-footer__link-list a:hover {
    color: var(--color-accent);
}

.site-footer__contact-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.site-footer__contact-list li {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.site-footer__contact-label {
    font-size: 12px;
    color: var(--hero-muted);
    letter-spacing: 0.3px;
}

.site-footer__contact-list span:last-child {
    font-size: 14px;
    color: var(--hero-text);
    line-height: 1.5;
}

.site-footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 24px 0;
    text-align: center;
}

.site-footer__bottom p {
    font-size: 13px;
    color: var(--hero-muted);
}


/* ========== 17. 响应式断点（≤1024 平板 / ≤768 手机） ========== */

/* 平板及以下：3 列变 2 列，2 列变 1 列 */
@media (max-width: 1024px) {

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

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

    .about-content {
        grid-template-areas:
            "text" "connect" "gallery";
    }

    .engine-showcase {
        grid-template-columns: 1fr;
    }

    .site-footer__inner {
        grid-template-columns: 1fr 1fr;
    }

    .flow-track {
        flex-direction: column;
        align-items: center;
        gap: 8px;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

    .site-section {
        padding: 64px 0;
    }
}

/* 手机：单列 + 折叠菜单 */
@media (max-width: 768px) {

    .site-navbar__menu,
    .site-navbar__login,
    .site-navbar__cta {
        display: none;
    }

    .site-navbar__toggle {
        display: flex;
    }

    .site-footer__inner {
        grid-template-columns: 1fr;
    }

    .caps-grid,
    .roles-grid {
        grid-template-columns: 1fr;
    }

    .site-hero__title {
        font-size: 32px;
    }

    .site-hero__title-accent {
        font-size: 32px;
    }

    .stat-card__num {
        font-size: 32px;
    }

    .section-header__title {
        font-size: 26px;
    }

    .site-section {
        padding: 48px 0;
    }

    .site-container {
        padding: 0 16px;
    }
}