/* ====================================
   小智科技 官网样式 - XiaozhiTech
   苹果风 + 玻璃态 + 渐变光晕
   ==================================== */

:root {
    /* 颜色 */
    --bg-dark: #000000;
    --bg-darker: #0a0a0a;
    --bg-card-dark: #1d1d1f;
    --bg-light: #ffffff;
    --bg-soft: #f5f5f7;
    --bg-card-light: #ffffff;

    --text-dark: #1d1d1f;
    --text-light: #f5f5f7;
    --text-muted-dark: #6e6e73;
    --text-muted-light: #a1a1a6;

    /* 渐变 */
    --grad-1: #5E5CE6;
    --grad-2: #BF5AF2;
    --grad-3: #FF375F;
    --gradient-main: linear-gradient(135deg, #5E5CE6 0%, #BF5AF2 50%, #FF375F 100%);
    --gradient-soft: linear-gradient(135deg, #5E5CE6 0%, #BF5AF2 100%);

    /* 尺寸 */
    --nav-height: 60px;
    --container-max: 1200px;

    /* 缓动 */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
    background: var(--bg-dark);
    color: var(--text-light);
    line-height: 1.5;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

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

/* ===== 渐变文字 ===== */
.gradient-text {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

/* ===== 导航 ===== */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-height);
    z-index: 100;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: background 0.4s var(--ease-out), border-color 0.4s var(--ease-out);
}

.nav.scrolled {
    background: rgba(0, 0, 0, 0.85);
    border-bottom-color: rgba(255, 255, 255, 0.12);
}

.nav-inner {
    max-width: var(--container-max);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 17px;
    letter-spacing: -0.01em;
}

.logo-mark {
    display: flex;
    align-items: center;
    justify-content: center;
    filter: drop-shadow(0 4px 16px rgba(191, 90, 242, 0.4));
}

.nav-menu {
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-menu a {
    font-size: 14px;
    font-weight: 400;
    color: var(--text-muted-light);
    transition: color 0.2s;
    position: relative;
}

.nav-menu a:hover { color: var(--text-light); }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-light);
    border-radius: 2px;
    transition: transform 0.3s, opacity 0.3s;
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 120px 24px 80px;
    overflow: hidden;
    background: radial-gradient(ellipse at top, #1a0a2e 0%, #000000 60%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    mix-blend-mode: screen;
    animation: float 20s infinite var(--ease-in-out);
}

.blob-1 {
    width: 600px; height: 600px;
    background: radial-gradient(circle, #5E5CE6 0%, transparent 70%);
    top: -200px; left: -100px;
}

.blob-2 {
    width: 700px; height: 700px;
    background: radial-gradient(circle, #BF5AF2 0%, transparent 70%);
    top: 30%; right: -200px;
    animation-delay: -7s;
}

.blob-3 {
    width: 500px; height: 500px;
    background: radial-gradient(circle, #FF375F 0%, transparent 70%);
    bottom: -100px; left: 30%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33%      { transform: translate(80px, -60px) scale(1.1); }
    66%      { transform: translate(-60px, 80px) scale(0.95); }
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, #000 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 0%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1000px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-light);
    margin-bottom: 32px;
}

.badge-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: #30D158;
    box-shadow: 0 0 8px #30D158;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.4; }
}

.hero-title {
    font-size: clamp(48px, 9vw, 112px);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.04em;
    margin-bottom: 28px;
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 21px);
    font-weight: 400;
    color: var(--text-muted-light);
    line-height: 1.5;
    margin-bottom: 48px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 96px;
    flex-wrap: wrap;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 500;
    transition: transform 0.2s var(--ease-out), box-shadow 0.3s, background 0.3s;
    cursor: pointer;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-main);
    color: white;
    box-shadow: 0 8px 24px rgba(191, 90, 242, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(191, 90, 242, 0.5);
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-light);
    border: 1px solid rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-2px);
}

/* ===== Hero 统计 ===== */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 32px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.stat {
    padding: 0 36px;
    text-align: center;
}

.stat-num {
    font-size: clamp(28px, 5vw, 48px);
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.03em;
    line-height: 1;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted-light);
    margin-top: 8px;
    font-weight: 500;
    letter-spacing: 0.02em;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
}

/* ===== 滚动提示 ===== */
.scroll-hint {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    font-size: 12px;
    color: var(--text-muted-light);
    z-index: 2;
    animation: bobUp 2s infinite var(--ease-in-out);
}

.scroll-mouse {
    width: 22px;
    height: 36px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: 12px;
    position: relative;
}

.scroll-mouse::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 8px;
    background: white;
    border-radius: 2px;
    animation: scrollWheel 2s infinite;
}

@keyframes scrollWheel {
    0%   { opacity: 1; transform: translate(-50%, 0); }
    100% { opacity: 0; transform: translate(-50%, 12px); }
}

@keyframes bobUp {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50%      { transform: translateX(-50%) translateY(-6px); }
}

/* ===== Section 通用 ===== */
.section {
    padding: 140px 0;
    position: relative;
}

.section-light { background: var(--bg-light); color: var(--text-dark); }
.section-dark  { background: var(--bg-dark); color: var(--text-light); }
.section-cta {
    background:
        radial-gradient(ellipse at top, rgba(94, 92, 230, 0.2) 0%, transparent 60%),
        radial-gradient(ellipse at bottom, rgba(255, 55, 95, 0.15) 0%, transparent 60%),
        var(--bg-dark);
}

.section-label {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--grad-1);
    margin-bottom: 20px;
}

.section-label.light { color: var(--grad-2); }

.section-title {
    font-size: clamp(36px, 6vw, 72px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 28px;
}

.section-title.light { color: var(--text-light); }

.section-lead {
    font-size: clamp(17px, 2vw, 20px);
    color: var(--text-muted-dark);
    max-width: 720px;
    margin-bottom: 80px;
    line-height: 1.6;
}

.section-dark .section-lead { color: var(--text-muted-light); }

/* ===== Mission 卡片 ===== */
.mission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.mission-card {
    padding: 36px 28px;
    background: var(--bg-soft);
    border-radius: 24px;
    transition: transform 0.4s var(--ease-out), box-shadow 0.4s;
    border: 1px solid transparent;
}

.mission-card:hover {
    transform: translateY(-6px);
    background: white;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
}

.mission-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-bottom: 20px;
    background: var(--gradient-main);
    box-shadow: 0 8px 24px rgba(191, 90, 242, 0.3);
}

.mission-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.mission-card p {
    font-size: 15px;
    color: var(--text-muted-dark);
    line-height: 1.55;
}

/* ===== 业务流程 ===== */
.business-flow {
    display: flex;
    align-items: stretch;
    gap: 16px;
    flex-wrap: wrap;
}

.flow-step {
    flex: 1;
    min-width: 200px;
    padding: 36px 28px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    transition: all 0.4s var(--ease-out);
    position: relative;
    overflow: hidden;
}

.flow-step::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-main);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s var(--ease-out);
}

.flow-step:hover {
    background: rgba(255, 255, 255, 0.06);
    transform: translateY(-4px);
    border-color: rgba(191, 90, 242, 0.3);
}

.flow-step:hover::before { transform: scaleX(1); }

.flow-num {
    font-size: 14px;
    font-weight: 700;
    color: var(--grad-2);
    margin-bottom: 16px;
    letter-spacing: 0.1em;
}

.flow-content h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 10px;
}

.flow-content p {
    font-size: 14px;
    color: var(--text-muted-light);
    line-height: 1.55;
}

.flow-arrow {
    display: flex;
    align-items: center;
    color: var(--grad-2);
    font-size: 24px;
    opacity: 0.5;
}

/* ===== 产品矩阵 ===== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.product-card {
    position: relative;
    padding: 36px 28px;
    background: white;
    border-radius: 28px;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.06);
    transition: transform 0.4s var(--ease-out), box-shadow 0.4s;
    cursor: pointer;
}

.product-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--c1), var(--c2));
    opacity: 0;
    transition: opacity 0.4s;
    z-index: 0;
    mix-blend-mode: overlay;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.15);
}

.product-glow {
    position: absolute;
    top: -50%; right: -50%;
    width: 200%; height: 200%;
    background: radial-gradient(circle, var(--c1) 0%, transparent 50%);
    opacity: 0.08;
    transition: opacity 0.4s;
    pointer-events: none;
}

.product-card:hover .product-glow { opacity: 0.15; }

.product-icon {
    position: relative;
    z-index: 1;
    font-size: 44px;
    margin-bottom: 20px;
    width: 72px;
    height: 72px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--c1), var(--c2));
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.product-tag {
    position: relative;
    z-index: 1;
    display: inline-block;
    padding: 4px 10px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--c1);
    background: color-mix(in srgb, var(--c1) 10%, transparent);
    border-radius: 6px;
    margin-bottom: 12px;
}

.product-card h3 {
    position: relative;
    z-index: 1;
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.product-card p {
    position: relative;
    z-index: 1;
    font-size: 14px;
    color: var(--text-muted-dark);
    line-height: 1.55;
}

/* ===== 技术栈 ===== */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.tech-card {
    padding: 32px 28px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    transition: all 0.3s var(--ease-out);
}

.tech-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(191, 90, 242, 0.3);
    transform: translateY(-4px);
}

.tech-cat {
    font-size: 13px;
    font-weight: 600;
    color: var(--grad-2);
    margin-bottom: 16px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-tags span {
    display: inline-block;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-light);
    transition: all 0.2s;
}

.tech-tags span:hover {
    background: var(--gradient-soft);
    border-color: transparent;
    transform: translateY(-1px);
}

/* ===== CTA ===== */
.cta-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    color: var(--text-light);
}

.cta-subtitle {
    font-size: clamp(16px, 2vw, 19px);
    color: var(--text-muted-light);
    margin-bottom: 48px;
    line-height: 1.6;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* ===== Footer ===== */
.footer {
    background: #000;
    color: var(--text-muted-light);
    padding: 80px 0 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-top {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 64px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    margin-bottom: 32px;
}

.footer-brand .nav-logo {
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 14px;
    color: var(--text-muted-light);
    line-height: 1.6;
}

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

.footer-col-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 16px;
    letter-spacing: 0.05em;
}

.footer-col a {
    display: block;
    font-size: 13px;
    color: var(--text-muted-light);
    margin-bottom: 10px;
    transition: color 0.2s;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    flex-wrap: wrap;
    gap: 12px;
}

/* ===== 滚动淡入 ===== */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 1s var(--ease-out) forwards;
    animation-delay: var(--delay, 0s);
}

@keyframes fadeUp {
    to { opacity: 1; transform: translateY(0); }
}

.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.reveal.in-view {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 968px) {
    .nav-menu { display: none; }
    .nav-toggle { display: flex; }

    .business-flow { flex-direction: column; }
    .flow-arrow {
        transform: rotate(90deg);
        justify-content: center;
        margin: -8px 0;
    }

    .footer-top {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .section { padding: 96px 0; }
}

@media (max-width: 640px) {
    .hero { padding: 100px 20px 60px; }
    .hero-stats {
        flex-wrap: wrap;
        gap: 24px 0;
    }
    .stat { padding: 0 16px; }
    .stat-divider { display: none; }

    .hero-cta { margin-bottom: 64px; }
    .btn { width: 100%; max-width: 320px; }

    .footer-links { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; }
}

/* ===== 滚动横幅 ===== */
.marquee {
    background: #000;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    padding: 20px 0;
    overflow: hidden;
    white-space: nowrap;
}

.marquee-track {
    display: inline-flex;
    align-items: center;
    gap: 24px;
    animation: marquee 30s linear infinite;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-muted-light);
}

.marquee-track span:not(.dot) {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 600;
}

.marquee-track .dot {
    color: var(--text-muted-light);
    -webkit-text-fill-color: var(--text-muted-light);
}

@keyframes marquee {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}

/* ===== 创始故事 ===== */
.story-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
    align-items: start;
}

.story-left { position: sticky; top: 100px; }

.story-right {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.story-block {
    padding: 32px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    transition: all 0.3s var(--ease-out);
}

.story-block:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(191, 90, 242, 0.3);
    transform: translateX(8px);
}

.story-block h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
    background: var(--gradient-soft);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.story-block p {
    font-size: 15px;
    color: var(--text-muted-light);
    line-height: 1.7;
}

/* ===== 服务承诺 ===== */
.promise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-top: 96px;
}

.promise-card {
    padding: 36px 28px;
    background: white;
    border-radius: 20px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    transition: all 0.3s var(--ease-out);
    position: relative;
}

.promise-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.promise-num {
    font-size: 14px;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 16px;
    letter-spacing: 0.1em;
}

.promise-card h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.promise-card p {
    font-size: 14px;
    color: var(--text-muted-dark);
    line-height: 1.6;
}

/* ===== 产品元信息 ===== */
.product-meta {
    position: relative;
    z-index: 1;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-muted-dark);
}

.status-live, .status-beta {
    font-weight: 600;
    font-size: 12px;
}

.status-live { color: #30D158; }
.status-beta { color: #FF9F0A; }

.product-soon {
    background: linear-gradient(135deg, rgba(94, 92, 230, 0.08), rgba(255, 55, 95, 0.08));
    border: 1px dashed rgba(191, 90, 242, 0.3);
}

.link-arrow {
    color: #5E5CE6;
    font-weight: 600;
    transition: transform 0.2s;
    display: inline-block;
}

.link-arrow:hover { transform: translateX(4px); }

/* ===== 时间线 ===== */
.timeline {
    position: relative;
    padding-left: 40px;
    max-width: 800px;
    margin-top: 60px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 12px;
    bottom: 12px;
    width: 2px;
    background: linear-gradient(180deg, #5E5CE6 0%, #BF5AF2 50%, #FF375F 100%);
}

.timeline-item {
    position: relative;
    padding-bottom: 56px;
}

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

.timeline-dot {
    position: absolute;
    left: -40px;
    top: 4px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: white;
    border: 3px solid #BF5AF2;
    box-shadow: 0 0 0 6px rgba(191, 90, 242, 0.15);
}

.timeline-date {
    font-size: 13px;
    font-weight: 700;
    color: #5E5CE6;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
}

.timeline-content h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.timeline-content p {
    font-size: 15px;
    color: var(--text-muted-dark);
    line-height: 1.6;
}

/* ===== 架构理念 ===== */
.arch-box {
    margin-top: 96px;
    padding: 56px 48px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 28px;
}

.arch-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 36px;
    text-align: center;
    letter-spacing: -0.01em;
}

.arch-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 36px;
}

.arch-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.arch-num {
    font-size: 32px;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}

.arch-item strong {
    display: block;
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 6px;
}

.arch-item p {
    font-size: 14px;
    color: var(--text-muted-light);
    line-height: 1.55;
}

/* ===== 服务模式 ===== */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 64px;
}

.service-card {
    position: relative;
    padding: 40px 32px;
    background: white;
    border-radius: 24px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    transition: all 0.3s var(--ease-out);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.12);
}

.service-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 4px 10px;
    background: var(--gradient-main);
    color: white;
    font-size: 11px;
    font-weight: 600;
    border-radius: 6px;
    letter-spacing: 0.05em;
}

.service-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.service-desc {
    font-size: 14px;
    color: var(--text-muted-dark);
    line-height: 1.6;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.service-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.service-list li {
    position: relative;
    padding-left: 24px;
    font-size: 14px;
    color: var(--text-dark);
    line-height: 1.5;
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 7px;
    width: 14px;
    height: 8px;
    border-left: 2px solid #5E5CE6;
    border-bottom: 2px solid #5E5CE6;
    transform: rotate(-45deg);
}

/* ===== FAQ ===== */
.container-narrow { max-width: 880px; }

.faq-list {
    margin-top: 56px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: white;
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s var(--ease-out);
}

.faq-item[open] {
    border-color: rgba(94, 92, 230, 0.3);
    box-shadow: 0 12px 32px rgba(94, 92, 230, 0.08);
}

.faq-item summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 28px;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    color: var(--text-dark);
    transition: color 0.2s;
}

.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: #5E5CE6; }

.faq-icon {
    font-size: 24px;
    color: #5E5CE6;
    font-weight: 300;
    transition: transform 0.3s var(--ease-out);
}

.faq-item[open] .faq-icon { transform: rotate(45deg); }

.faq-answer {
    padding: 0 28px 24px;
    font-size: 15px;
    color: var(--text-muted-dark);
    line-height: 1.7;
}

/* ===== 联系元信息 ===== */
.contact-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 32px;
    margin-top: 80px;
    padding-top: 56px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: left;
}

.contact-meta-label {
    font-size: 12px;
    color: var(--text-muted-light);
    margin-bottom: 8px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.contact-meta-value {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-light);
}

/* ===== Responsive add-ons ===== */
@media (max-width: 968px) {
    .story-layout {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    .story-left { position: static; }
    .arch-box { padding: 40px 28px; }
}

@media (max-width: 640px) {
    .promise-grid { gap: 16px; }
    .promise-card, .service-card { padding: 28px 24px; }
    .arch-box { padding: 32px 20px; }
    .contact-meta { gap: 24px; }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    .reveal { opacity: 1; transform: none; }
}