:root {
    --bg: #0b0d16;
    /* 深蓝紫背景 */
    --text: #e8e9ef;
    --muted: #a9afbc;
    --card: #13162a;
    --brand: #8b5cf6;
    /* violet-500 */
    --brand-2: #06b6d4;
    /* cyan-500 */
    --accent: #f43f5e;
    /* rose-500 */
    --header-h: 64px;
    /* 默认头部高度，JS 会动态更新 */
}

* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Noto Sans, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    background: radial-gradient(1200px 600px at 80% -10%, color-mix(in oklab, var(--brand) 25%, transparent), transparent 60%), var(--bg);
    color: var(--text);
    line-height: 1.6;
    padding-top: var(--header-h);
}

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

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

.container {
    width: min(1100px, 92%);
    margin: 0 auto;
}

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    backdrop-filter: blur(10px);
    background: color-mix(in oklab, var(--bg) 76%, transparent);
    border-bottom: 1px solid rgba(255, 255, 255, .06);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
}

.logo {
    font-size: 26px;
    font-weight: 800;
    letter-spacing: .1em;
}

.menu {
    display: flex;
    gap: 18px;
    align-items: center;
}

.menu a {
    padding: 8px 10px;
    border-radius: 8px;
    transition: transform .2s ease, background .2s ease;
    color: var(--muted);
}

.menu a:hover {
    transform: translateY(-1px);
    background: rgba(255, 255, 255, .06);
    color: var(--text);
}

.menu .cta {
    color: white;
    background: linear-gradient(90deg, var(--brand), var(--brand-2));
    padding: 8px 14px;
}

.hamburger {
    display: none;
    background: none;
    border: 0;
    font-size: 20px;
    color: var(--text);
}

/* Hero */
.hero-section {
    position: relative;
    overflow: hidden;
    padding: 80px 0 40px;
}

.floating-bg {
    position: absolute;
    inset: -20% -10% auto -10%;
    height: 60vh;
    background: radial-gradient(40% 60% at 20% 30%, color-mix(in oklab, var(--brand-2) 26%, transparent), transparent 60%), radial-gradient(40% 60% at 70% 20%, color-mix(in oklab, var(--accent) 22%, transparent), transparent 60%);
    filter: blur(40px);
    animation: floatBg 12s ease-in-out infinite alternate;
}

@keyframes floatBg {
    to {
        transform: translate3d(0, -20px, 0) scale(1.03);
    }
}

.carousel {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    isolation: isolate;
    box-shadow: 0 10px 40px rgba(0, 0, 0, .25);
}

.slides {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: 100%;
}

.slide {
    display: grid;
    place-items: center;
    min-height: 420px;
    background: var(--bg);
    background-image: var(--bg);
    transition: opacity .4s ease;
}

.slide-content {
    text-align: center;
    padding: 60px 20px;
}

.badges {
    display: inline-flex;
    gap: 8px;
    margin-bottom: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.badge {
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 999px;
    color: #fff;
    background: linear-gradient(90deg, var(--brand), var(--brand-2));
    border: 1px solid rgba(255, 255, 255, .2);
    opacity: .95;
}

.slide h1,
.slide h2 {
    margin: 0 0 10px;
}

.pill-list {
    display: inline-flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
    padding: 0;
    margin: 18px 0 0;
    list-style: none;
}

.pill-list li {
    background: rgba(255, 255, 255, .12);
    border: 1px solid rgba(255, 255, 255, .15);
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 13px;
}

.ctrl {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, .25);
    background: rgba(0, 0, 0, .25);
    color: #fff;
    cursor: pointer;
    backdrop-filter: blur(6px);
}

.ctrl:hover {
    background: rgba(0, 0, 0, .35);
}

.ctrl.prev {
    left: 12px;
}

.ctrl.next {
    right: 12px;
}

.dots {
    position: absolute;
    bottom: 12px;
    left: 0;
    right: 0;
    display: flex;
    gap: 8px;
    justify-content: center;
}

.dots button {
    width: 8px;
    height: 8px;
    border-radius: 999px;
    border: 0;
    background: rgba(255, 255, 255, .35);
    cursor: pointer;
}

.dots button[aria-selected="true"] {
    background: #fff;
    transform: scale(1.2);
}

/* Sections */
.section {
    padding: 70px 0;
}

.section-alt {
    background: linear-gradient(180deg, rgba(255, 255, 255, .02), rgba(255, 255, 255, 0));
}

.section-title {
    font-size: 28px;
    margin: 0 0 24px;
    letter-spacing: .04em;
}

.highlights {
    padding-top: 24px;
}

.metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 10px;
}

.metric {
    background: rgba(255, 255, 255, .04);
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 14px;
    padding: 16px;
    text-align: center;
}

.metric .num {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(90deg, var(--brand), var(--brand-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.metric .label {
    color: var(--muted);
    font-size: 14px;
}

.chips {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.chip {
    padding: 6px 10px;
    border-radius: 999px;
    color: var(--text);
    background: rgba(255, 255, 255, .06);
    border: 1px solid rgba(255, 255, 255, .08);
    font-size: 13px;
}

.grid {
    display: grid;
    gap: 18px;
}

.cards {
    grid-template-columns: repeat(4, 1fr);
}

.works {
    grid-template-columns: repeat(4, 1fr);
}

.card {
    background: linear-gradient(180deg, rgba(255, 255, 255, .04), rgba(255, 255, 255, .02));
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 14px;
    padding: 18px;
    transition: transform .25s ease, box-shadow .25s ease;
    position: relative;
    overflow: hidden;
}

.card::after {
    content: "";
    position: absolute;
    inset: -40% auto auto -40%;
    width: 160px;
    height: 160px;
    background: radial-gradient(closest-side, color-mix(in oklab, var(--brand) 40%, transparent), transparent);
    transform: translate3d(var(--mx, 0), var(--my, 0), 0);
    transition: transform .08s linear;
    pointer-events: none;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, .25);
}

.card .icon {
    font-size: 24px;
    margin-bottom: 8px;
}

.card .more {
    display: inline-block;
    margin-top: 8px;
    color: var(--brand);
}

.work {
    background: rgba(255, 255, 255, .03);
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 12px;
    overflow: hidden;
}

.work .thumb {
    aspect-ratio: 16/10;
    background: linear-gradient(135deg, color-mix(in oklab, var(--c) 70%, black), color-mix(in oklab, var(--c) 30%, white));
    filter: saturate(1.2);
    transition: transform .3s ease;
}

.work:hover .thumb {
    transform: scale(1.06);
}

.work figcaption {
    padding: 10px 12px;
    font-size: 14px;
    color: var(--muted);
}

.about {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 24px;
    align-items: center;
}

.about-visual {
    position: relative;
    min-height: 260px;
}

.about .orb {
    position: absolute;
    inset: 10% 20% 10% 10%;
    background: radial-gradient(circle at 30% 30%, color-mix(in oklab, var(--brand) 55%, transparent), transparent 40%), radial-gradient(circle at 70% 60%, color-mix(in oklab, var(--brand-2) 45%, transparent), transparent 40%), radial-gradient(closest-side, color-mix(in oklab, var(--accent) 50%, transparent), transparent);
    filter: blur(14px);
    border-radius: 50%;
    animation: orb 10s ease-in-out infinite alternate;
}

@keyframes orb {
    to {
        transform: translate3d(10px, -10px, 0) scale(1.03);
    }
}

.ticks {
    padding-left: 18px;
    color: var(--muted);
}

.ticks li {
    margin: 6px 0;
}

.contact {
    display: grid;
    grid-template-columns: 1.3fr .7fr;
    gap: 24px;
}

.contact-card {
    background: rgba(255, 255, 255, .04);
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: 16px;
    padding: 18px;
}

.contact-form .row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    background: rgba(255, 255, 255, .06);
    border: 1px solid rgba(255, 255, 255, .1);
    color: var(--text);
    padding: 10px 12px;
    border-radius: 10px;
    outline: none;
}

.contact-form textarea {
    resize: vertical;
}

.btn {
    margin-top: 10px;
    background: linear-gradient(90deg, var(--brand), var(--brand-2));
    color: #fff;
    border: 0;
    padding: 10px 14px;
    border-radius: 10px;
    cursor: pointer;
}

/* Footer */
.site-footer {
    padding: 30px 0 60px;
    color: var(--muted);
}

.marquee {
    overflow: hidden;
    border-top: 1px solid rgba(255, 255, 255, .06);
    border-bottom: 1px solid rgba(255, 255, 255, .06);
    margin: 10px 0 14px;
}

.marquee .track {
    white-space: nowrap;
    padding: 10px 0;
    animation: marquee 20s linear infinite;
    opacity: .8;
}

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

/* Reveal on scroll */
[data-reveal] {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity .6s ease, transform .6s ease;
}

[data-reveal].is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Smooth scroll */
html {
    scroll-behavior: smooth;
}

/* Anchor offset for fixed header */
section,
header,
footer {
    scroll-margin-top: calc(var(--header-h) + 12px);
}

/* Responsive */
@media (max-width: 900px) {

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

    .about,
    .contact {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 640px) {
    .menu {
        display: none;
    }

    .hamburger {
        display: inline-block;
    }

    .section {
        padding: 54px 0;
    }

    .slide {
        min-height: 360px;
    }

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

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

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