/* ============================================
   星润游科 - 企业官网样式
   字体: Microsoft YaHei | 风格: 现代科技深色
   ============================================ */

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

:root {
    --c-bg: #0a0e1a;
    --c-bg-2: #0f1424;
    --c-bg-3: #161c30;
    --c-surface: #1a2138;
    --c-border: rgba(124, 92, 255, 0.18);
    --c-text: #e8ecf5;
    --c-text-muted: #8892a8;
    --c-text-dim: #5a6479;
    --c-cyan: #5ee7ff;
    --c-purple: #7c5cff;
    --c-gold: #ffb454;
    --c-green: #4ade80;
    --c-red: #ff6b6b;
    --grad-main: linear-gradient(135deg, #5ee7ff 0%, #7c5cff 100%);
    --grad-gold: linear-gradient(135deg, #ffb454 0%, #ff6b6b 100%);
    --shadow-soft: 0 10px 40px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px rgba(124, 92, 255, 0.25);
    --radius: 16px;
    --radius-sm: 10px;
    --maxw: 1280px;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: "Microsoft YaHei", "微软雅黑", "Segoe UI", sans-serif;
    background: var(--c-bg);
    color: var(--c-text);
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

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

button {
    font-family: inherit;
    border: none;
    cursor: pointer;
    background: none;
    color: inherit;
}

input,
select,
textarea {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

::selection {
    background: var(--c-purple);
    color: #fff;
}

/* ---------- 通用容器 ---------- */
.section-head {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 64px;
    padding: 0 24px;
}

.section-eyebrow {
    display: inline-block;
    font-size: 13px;
    letter-spacing: 4px;
    color: var(--c-cyan);
    margin-bottom: 16px;
    font-weight: 700;
}

.section-eyebrow.light {
    color: var(--c-cyan);
}

.section-title {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.section-title.light {
    color: #fff;
}

.section-subtitle {
    color: var(--c-text-muted);
    font-size: 16px;
}

.gradient-text {
    background: var(--grad-main);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: all 0.3s var(--ease);
    cursor: pointer;
    white-space: nowrap;
}

.btn-primary {
    background: var(--grad-main);
    color: #0a0e1a;
    box-shadow: 0 8px 24px rgba(124, 92, 255, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(124, 92, 255, 0.5);
}

.btn-ghost {
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--c-text);
    backdrop-filter: blur(8px);
}

.btn-ghost:hover {
    border-color: var(--c-cyan);
    color: var(--c-cyan);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

/* ---------- 顶部导航 ---------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 18px 0;
    transition: all 0.3s var(--ease);
    background: rgba(10, 14, 26, 0.6);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
}

.header.scrolled {
    padding: 12px 0;
    background: rgba(10, 14, 26, 0.85);
    border-bottom-color: var(--c-border);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-mark {
    display: flex;
    filter: drop-shadow(0 0 8px rgba(124, 92, 255, 0.4));
}

.logo-mark.small {
}

.logo-mark img {
    display: block;
    object-fit: contain;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-text strong {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 1px;
}

.logo-text em {
    font-size: 10px;
    color: var(--c-text-muted);
    letter-spacing: 2px;
    font-style: normal;
}

.nav-menu {
    display: flex;
    gap: 8px;
    align-items: center;
}

.nav-link {
    position: relative;
    padding: 8px 16px;
    font-size: 15px;
    color: var(--c-text-muted);
    border-radius: 999px;
    transition: all 0.25s var(--ease);
}

.nav-link:hover {
    color: var(--c-text);
    background: rgba(255, 255, 255, 0.04);
}

.nav-link.active {
    color: var(--c-cyan);
}

.nav-link.active::after {
    content: "";
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--c-cyan);
    box-shadow: 0 0 8px var(--c-cyan);
}

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

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

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero 首屏 ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    background: radial-gradient(ellipse at 30% 40%, #1a1240 0%, var(--c-bg) 60%);
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(124, 92, 255, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(124, 92, 255, 0.06) 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%);
}

/* 星空 canvas */
.starfield {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.55;
    animation: float 14s ease-in-out infinite;
}

.orb-1 {
    width: 480px;
    height: 480px;
    background: radial-gradient(circle, var(--c-purple), transparent 70%);
    top: -100px;
    left: -80px;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--c-cyan), transparent 70%);
    bottom: -120px;
    right: -60px;
    animation-delay: -4s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--c-gold), transparent 70%);
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0.3;
    animation-delay: -8s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(30px, -40px); }
    66% { transform: translate(-20px, 30px); }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 880px;
}

.hero-tag {
    display: inline-block;
    padding: 8px 20px;
    border: 1px solid var(--c-border);
    border-radius: 999px;
    font-size: 13px;
    color: var(--c-cyan);
    letter-spacing: 2px;
    margin-bottom: 32px;
    background: rgba(124, 92, 255, 0.08);
    backdrop-filter: blur(8px);
    opacity: 0;
    animation: fadeUp 0.8s var(--ease) 0.2s forwards;
}

.hero-title {
    font-size: clamp(36px, 6vw, 72px);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: 2px;
    margin-bottom: 28px;
}

.title-line {
    display: block;
    opacity: 0;
    animation: fadeUp 0.8s var(--ease) forwards;
}

.title-line:nth-child(1) {
    animation-delay: 0.35s;
}

.title-line:nth-child(2) {
    animation-delay: 0.5s;
}

.hero-desc {
    font-size: 17px;
    color: var(--c-text-muted);
    max-width: 640px;
    margin: 0 auto 40px;
    line-height: 1.8;
    opacity: 0;
    animation: fadeUp 0.8s var(--ease) 0.65s forwards;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeUp 0.8s var(--ease) 0.8s forwards;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 720px;
    margin: 64px auto 0;
    padding-top: 40px;
    border-top: 1px solid var(--c-border);
    opacity: 0;
    animation: fadeUp 0.8s var(--ease) 0.95s forwards;
}

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

.stat-item strong {
    font-size: 36px;
    font-weight: 800;
    background: var(--grad-main);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.stat-item span {
    font-size: 18px;
    color: var(--c-cyan);
    font-weight: 700;
}

.stat-item em {
    display: block;
    font-style: normal;
    font-size: 13px;
    color: var(--c-text-dim);
    margin-top: 4px;
    letter-spacing: 1px;
}

.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(--c-text-dim);
    letter-spacing: 2px;
    z-index: 2;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--c-cyan), transparent);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: var(--c-cyan);
    animation: scrollDown 1.8s var(--ease) infinite;
}

@keyframes scrollDown {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(200%); }
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---------- 业务领域 ---------- */
.business {
    padding: 120px 24px;
    max-width: var(--maxw);
    margin: 0 auto;
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.biz-card {
    position: relative;
    padding: 40px 28px;
    border-radius: var(--radius);
    background: linear-gradient(180deg, var(--c-surface) 0%, var(--c-bg-2) 100%);
    border: 1px solid var(--c-border);
    overflow: hidden;
    transition: all 0.4s var(--ease);
    min-height: 440px;
    display: flex;
    flex-direction: column;
}

.biz-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--biz-grad);
    opacity: 0;
    transition: opacity 0.4s var(--ease);
    z-index: 0;
}

.biz-card:hover {
    transform: translateY(-8px);
    border-color: transparent;
    box-shadow: var(--shadow-glow);
}

.biz-card:hover::before {
    opacity: 0.08;
}

.biz-games { --biz-grad: linear-gradient(135deg, #ffb454, #ff6b6b); }
.biz-vr { --biz-grad: linear-gradient(135deg, #5ee7ff, #4ade80); }
.biz-meta { --biz-grad: linear-gradient(135deg, #7c5cff, #c54bff); }
.biz-defense { --biz-grad: linear-gradient(135deg, #4ade80, #5ee7ff); }

.biz-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.04);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--biz-color);
    position: relative;
    z-index: 1;
    border: 1px solid var(--c-border);
    transition: all 0.3s var(--ease);
}

.biz-games .biz-icon { color: var(--c-gold); }
.biz-vr .biz-icon { color: var(--c-cyan); }
.biz-meta .biz-icon { color: var(--c-purple); }
.biz-defense .biz-icon { color: var(--c-green); }

.biz-card:hover .biz-icon {
    transform: scale(1.08) rotate(-6deg);
    background: rgba(255, 255, 255, 0.08);
}

.biz-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
    position: relative;
    z-index: 1;
}

.biz-tagline {
    font-size: 11px;
    letter-spacing: 3px;
    color: var(--c-text-dim);
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.biz-desc {
    font-size: 14px;
    color: var(--c-text-muted);
    line-height: 1.7;
    margin-bottom: 24px;
    position: relative;
    z-index: 1;
}

.biz-points {
    margin-top: auto;
    position: relative;
    z-index: 1;
}

.biz-points li {
    font-size: 13px;
    color: var(--c-text-muted);
    padding: 6px 0 6px 18px;
    position: relative;
    border-top: 1px dashed rgba(255, 255, 255, 0.05);
}

.biz-points li:first-child {
    border-top: none;
}

.biz-points li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 14px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--biz-color, var(--c-cyan));
    box-shadow: 0 0 8px var(--biz-color, var(--c-cyan));
}

.biz-games .biz-points li::before { background: var(--c-gold); box-shadow: 0 0 8px var(--c-gold); }
.biz-vr .biz-points li::before { background: var(--c-cyan); box-shadow: 0 0 8px var(--c-cyan); }
.biz-meta .biz-points li::before { background: var(--c-purple); box-shadow: 0 0 8px var(--c-purple); }
.biz-defense .biz-points li::before { background: var(--c-green); box-shadow: 0 0 8px var(--c-green); }

.biz-index {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 48px;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.04);
    line-height: 1;
    z-index: 0;
}

/* ---------- 关于我们 ---------- */
.about {
    padding: 120px 24px;
    background: var(--c-bg-2);
    border-top: 1px solid var(--c-border);
    border-bottom: 1px solid var(--c-border);
    position: relative;
    overflow: hidden;
}

.about::before {
    content: "";
    position: absolute;
    top: 50%;
    left: -200px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--c-purple), transparent 70%);
    filter: blur(100px);
    opacity: 0.15;
}

.about-inner {
    max-width: var(--maxw);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 64px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.about-visual {
    position: relative;
    height: 480px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.visual-card {
    position: relative;
    width: 280px;
    height: 360px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, var(--c-surface), var(--c-bg-3));
    border: 1px solid var(--c-border);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: var(--shadow-soft), var(--shadow-glow);
    z-index: 2;
}

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

.visual-label {
    display: block;
    font-size: 12px;
    letter-spacing: 4px;
    color: var(--c-text-dim);
    margin-bottom: 8px;
}

.visual-year {
    display: block;
    font-size: 88px;
    font-weight: 800;
    background: var(--grad-main);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 8px;
}

.visual-text {
    display: block;
    font-size: 16px;
    color: var(--c-text-muted);
    letter-spacing: 2px;
}

.visual-decor {
    position: absolute;
    border-radius: var(--radius);
    border: 1px solid var(--c-border);
    background: rgba(124, 92, 255, 0.04);
    z-index: 1;
}

.decor-1 {
    width: 200px;
    height: 200px;
    top: 20px;
    right: -30px;
    transform: rotate(8deg);
    animation: float 10s ease-in-out infinite;
}

.decor-2 {
    width: 160px;
    height: 160px;
    bottom: 30px;
    left: -20px;
    transform: rotate(-12deg);
    animation: float 12s ease-in-out infinite reverse;
}

.about-text .section-title {
    text-align: left;
}

.about-lead {
    color: var(--c-text-muted);
    font-size: 16px;
    line-height: 1.9;
    margin: 24px 0 40px;
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.value-item {
    padding: 24px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--c-border);
    transition: all 0.3s var(--ease);
}

.value-item:hover {
    border-color: var(--c-cyan);
    background: rgba(94, 231, 255, 0.04);
    transform: translateY(-4px);
}

.value-num {
    display: block;
    font-size: 14px;
    font-weight: 700;
    color: var(--c-cyan);
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.value-item h4 {
    font-size: 18px;
    margin-bottom: 8px;
}

.value-item p {
    font-size: 13px;
    color: var(--c-text-muted);
    line-height: 1.7;
}

/* ---------- 新闻动态 ---------- */
.news {
    padding: 120px 24px;
    max-width: var(--maxw);
    margin: 0 auto;
}

.news-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 24px;
}

.news-featured {
    grid-row: span 2;
}

.news-card {
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    transition: all 0.4s var(--ease);
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    transform: translateY(-6px);
    border-color: var(--c-cyan);
    box-shadow: var(--shadow-soft);
}

.news-img {
    width: 100%;
    background-size: cover;
    background-position: center;
    background-color: var(--c-bg-3);
    transition: transform 0.6s var(--ease);
}

.news-featured .news-img {
    height: 320px;
}

.news-card:not(.news-featured) .news-img {
    height: 180px;
}

.news-card:hover .news-img {
    transform: scale(1.05);
}

.news-body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-tag {
    display: inline-block;
    align-self: flex-start;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 11px;
    background: rgba(94, 231, 255, 0.1);
    color: var(--c-cyan);
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.news-body h3 {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 12px;
    transition: color 0.3s var(--ease);
}

.news-featured .news-body h3 {
    font-size: 22px;
}

.news-card:hover .news-body h3 {
    color: var(--c-cyan);
}

.news-body p {
    font-size: 13px;
    color: var(--c-text-muted);
    line-height: 1.7;
    margin-bottom: 16px;
    flex: 1;
}

.news-date {
    font-size: 12px;
    color: var(--c-text-dim);
    letter-spacing: 1px;
}

/* ---------- 精选作品 ---------- */
.portfolio {
    padding: 120px 24px;
    max-width: var(--maxw);
    margin: 0 auto;
}

.filter-bar {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 48px;
}

.filter-btn {
    padding: 10px 24px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    color: var(--c-text-muted);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--c-border);
    transition: all 0.3s var(--ease);
    letter-spacing: 0.5px;
}

.filter-btn:hover {
    color: var(--c-text);
    border-color: var(--c-cyan);
    background: rgba(94, 231, 255, 0.06);
}

.filter-btn.active {
    color: #0a0e1a;
    background: var(--grad-main);
    border-color: transparent;
    box-shadow: 0 6px 20px rgba(124, 92, 255, 0.35);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.work-card {
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    transition: transform 0.4s var(--ease), border-color 0.4s var(--ease), box-shadow 0.4s var(--ease), opacity 0.4s var(--ease);
    display: flex;
    flex-direction: column;
}

.work-card:hover {
    transform: translateY(-8px);
    border-color: var(--c-cyan);
    box-shadow: var(--shadow-soft), 0 0 30px rgba(94, 231, 255, 0.12);
}

.work-card.hide {
    display: none;
}

.work-img {
    position: relative;
    height: 220px;
    background-size: cover;
    background-position: center;
    background-color: var(--c-bg-3);
    overflow: hidden;
}

.work-img::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(10, 14, 26, 0.85) 100%);
}

.work-img::before {
    content: "";
    position: absolute;
    inset: 0;
    background: inherit;
    background-size: cover;
    background-position: center;
    transition: transform 0.6s var(--ease);
}

.work-card:hover .work-img::before {
    transform: scale(1.08);
}

/* 由于 work-img 用 background-image，::before inherit 复制背景实现缩放 */
.work-cat {
    position: absolute;
    top: 16px;
    left: 16px;
    z-index: 2;
    padding: 5px 14px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    background: rgba(10, 14, 26, 0.7);
    backdrop-filter: blur(8px);
    border: 1px solid var(--c-border);
    color: var(--c-cyan);
}

.work-body {
    padding: 24px;
    flex: 1;
}

.work-body h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 10px;
    transition: color 0.3s var(--ease);
}

.work-card:hover .work-body h3 {
    color: var(--c-cyan);
}

.work-body p {
    font-size: 13px;
    color: var(--c-text-muted);
    line-height: 1.7;
}

.portfolio-more {
    text-align: center;
    margin-top: 56px;
}

/* ---------- 合作流程 ---------- */
.process {
    padding: 120px 24px;
    background: var(--c-bg-2);
    border-top: 1px solid var(--c-border);
    border-bottom: 1px solid var(--c-border);
    position: relative;
    overflow: hidden;
}

.process::before {
    content: "";
    position: absolute;
    top: 30%;
    right: -150px;
    width: 360px;
    height: 360px;
    background: radial-gradient(circle, var(--c-cyan), transparent 70%);
    filter: blur(110px);
    opacity: 0.12;
}

.process-grid {
    max-width: var(--maxw);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
    z-index: 1;
}

/* 步骤之间的连接线 */
.process-grid::before {
    content: "";
    position: absolute;
    top: 40px;
    left: 12%;
    right: 12%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--c-purple) 20%, var(--c-cyan) 80%, transparent);
    opacity: 0.4;
    z-index: 0;
}

.process-step {
    position: relative;
    padding: 32px 24px;
    border-radius: var(--radius);
    background: rgba(26, 33, 56, 0.5);
    border: 1px solid var(--c-border);
    text-align: center;
    transition: all 0.35s var(--ease);
    backdrop-filter: blur(8px);
}

.process-step:hover {
    transform: translateY(-6px);
    border-color: var(--c-cyan);
    background: rgba(94, 231, 255, 0.05);
    box-shadow: var(--shadow-glow);
}

.process-num {
    position: relative;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    margin: -56px auto 20px;
    border-radius: 50%;
    background: var(--grad-main);
    color: #0a0e1a;
    font-size: 20px;
    font-weight: 800;
    box-shadow: 0 0 0 6px var(--c-bg-2), 0 8px 24px rgba(124, 92, 255, 0.35);
}

.process-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

.process-desc {
    font-size: 13px;
    color: var(--c-text-muted);
    line-height: 1.7;
}

/* ---------- 联系我们 ---------- */
.contact {
    padding: 120px 24px;
    background: linear-gradient(180deg, var(--c-bg-2) 0%, #0c0815 100%);
    border-top: 1px solid var(--c-border);
    position: relative;
    overflow: hidden;
}

.contact::after {
    content: "";
    position: absolute;
    bottom: -200px;
    right: -200px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--c-purple), transparent 70%);
    filter: blur(120px);
    opacity: 0.2;
}

.contact-inner {
    max-width: var(--maxw);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    position: relative;
    z-index: 1;
}

.contact-info .section-title {
    text-align: left;
}

.contact-lead {
    color: var(--c-text-muted);
    font-size: 16px;
    line-height: 1.8;
    margin: 24px 0 40px;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-list li {
    padding: 16px 24px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--c-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    transition: all 0.3s var(--ease);
}

.contact-list li:hover {
    border-color: var(--c-cyan);
    transform: translateX(4px);
}

.ci-label {
    font-size: 13px;
    color: var(--c-text-dim);
    letter-spacing: 1px;
}

.contact-list strong {
    font-size: 15px;
    color: var(--c-text);
    font-weight: 600;
}

/* 表单 */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 40px;
    border-radius: var(--radius);
    background: rgba(26, 33, 56, 0.6);
    border: 1px solid var(--c-border);
    backdrop-filter: blur(12px);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    background: rgba(10, 14, 26, 0.6);
    border: 1px solid var(--c-border);
    color: var(--c-text);
    font-size: 14px;
    transition: all 0.25s var(--ease);
    outline: none;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--c-text-dim);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    border-color: var(--c-cyan);
    box-shadow: 0 0 0 3px rgba(94, 231, 255, 0.12);
}

.contact-form select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'><path d='M1 1l5 5 5-5' stroke='%238892a8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/></svg>");
    background-repeat: no-repeat;
    background-position: right 18px center;
    padding-right: 40px;
}

.contact-form select option {
    background: var(--c-bg-3);
    color: var(--c-text);
}

.contact-form textarea {
    resize: vertical;
    min-height: 100px;
}

.form-tip {
    font-size: 13px;
    text-align: center;
    min-height: 20px;
    color: var(--c-green);
    transition: all 0.3s var(--ease);
}

.form-tip.error {
    color: var(--c-red);
}

/* ---------- 页脚 ---------- */
.footer {
    padding: 48px 24px;
    background: #06080f;
    border-top: 1px solid var(--c-border);
}

.footer-inner {
    max-width: var(--maxw);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-brand strong {
    display: block;
    font-size: 16px;
    font-weight: 700;
}

.footer-brand em {
    font-size: 10px;
    color: var(--c-text-dim);
    letter-spacing: 2px;
    font-style: normal;
}

.footer-nav {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-nav a {
    font-size: 14px;
    color: var(--c-text-muted);
    transition: color 0.25s var(--ease);
}

.footer-nav a:hover {
    color: var(--c-cyan);
}

.footer-copy {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
    font-size: 12px;
    color: var(--c-text-dim);
}

/* ---------- 返回顶部 ---------- */
.back-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--grad-main);
    color: #0a0e1a;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(124, 92, 255, 0.35);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s var(--ease);
    z-index: 50;
}

.back-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(124, 92, 255, 0.5);
}

/* ---------- 滚动出现动画 ---------- */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

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

.reveal.delay-1 { transition-delay: 0.1s; }
.reveal.delay-2 { transition-delay: 0.2s; }
.reveal.delay-3 { transition-delay: 0.3s; }
.reveal.delay-4 { transition-delay: 0.4s; }

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

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

    .news-featured {
        grid-row: span 1;
        grid-column: span 2;
    }

    .about-inner {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .about-visual {
        height: 360px;
    }

    .contact-inner {
        grid-template-columns: 1fr;
        gap: 48px;
    }

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

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

    .process-grid::before {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 20px;
    }

    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(10, 14, 26, 0.98);
        backdrop-filter: blur(20px);
        padding: 24px;
        gap: 4px;
        border-bottom: 1px solid var(--c-border);
        transform: translateY(-120%);
        transition: transform 0.4s var(--ease);
        align-items: stretch;
    }

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

    .nav-link {
        padding: 14px 20px;
        border-radius: var(--radius-sm);
    }

    .nav-link.active::after {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 100px 20px 60px;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px 16px;
    }

    .stat-item strong {
        font-size: 28px;
    }

    .business,
    .about,
    .news,
    .portfolio,
    .process,
    .contact {
        padding: 80px 20px;
    }

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

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

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

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

    .news-featured {
        grid-column: span 1;
    }

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

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

    .contact-form {
        padding: 28px 24px;
    }

    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }

    .footer-copy {
        align-items: flex-start;
    }

    .back-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .logo-text em {
        display: none;
    }
}