/* 雨梦云网络科技工作室 — 全局设计系统 */

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

:root {
    --primary: #0b9fd9;
    --primary-dark: #0878a8;
    --primary-soft: rgba(11, 159, 217, 0.12);
    --accent: #2dd4bf;
    --ink: #0a1628;
    --ink-soft: #152238;
    --text: #334155;
    --text-light: #64748b;
    --bg: #f4f7fb;
    --bg-elevated: #ffffff;
    --border: rgba(15, 35, 60, 0.08);
    --shadow: 0 8px 30px rgba(10, 22, 40, 0.06);
    --shadow-lg: 0 24px 60px rgba(10, 22, 40, 0.12);
    --radius: 14px;
    --radius-lg: 22px;
    --nav-h: 76px;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
    --font-display: "Manrope", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    --font-body: "Noto Sans SC", "Manrope", "PingFang SC", "Microsoft YaHei", sans-serif;
    --max: 1180px;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background:
        radial-gradient(1200px 600px at 10% -10%, rgba(11, 159, 217, 0.08), transparent 55%),
        radial-gradient(900px 500px at 90% 0%, rgba(45, 212, 191, 0.07), transparent 50%),
        var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

body.is-loading {
    overflow: hidden;
}

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

a {
    color: inherit;
}

/* ========== 开场加载 ========== */
.page-loader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(circle at 30% 20%, rgba(11, 159, 217, 0.25), transparent 40%),
        radial-gradient(circle at 70% 80%, rgba(45, 212, 191, 0.18), transparent 40%),
        #07101d;
    transition: opacity 0.7s var(--ease), visibility 0.7s;
}

.page-loader.is-done {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader-inner {
    text-align: center;
    color: #fff;
}

.loader-mark {
    width: 72px;
    height: 72px;
    margin: 0 auto 22px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.12), 0 20px 50px rgba(0, 0, 0, 0.35);
    animation: loaderFloat 2s ease-in-out infinite;
}

.loader-mark img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.loader-brand {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    margin-bottom: 8px;
}

.loader-sub {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: 28px;
    letter-spacing: 0.08em;
}

.loader-bar {
    width: min(220px, 60vw);
    height: 2px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 99px;
    overflow: hidden;
}

.loader-progress {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: inherit;
    transition: width 0.35s var(--ease);
}

@keyframes loaderFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* ========== 页面切换遮罩 ========== */
.page-transition {
    position: fixed;
    inset: 0;
    z-index: 9998;
    background: #07101d;
    transform: scaleY(0);
    transform-origin: bottom;
    pointer-events: none;
}

.page-transition.is-covering {
    animation: coverIn 0.55s var(--ease) forwards;
    pointer-events: all;
}

.page-transition.is-revealing {
    transform-origin: top;
    animation: coverOut 0.55s var(--ease) forwards;
}

@keyframes coverIn {
    from { transform: scaleY(0); }
    to { transform: scaleY(1); }
}

@keyframes coverOut {
    from { transform: scaleY(1); }
    to { transform: scaleY(0); }
}

/* 页面进入 */
.page-enter {
    animation: pageEnter 0.85s var(--ease) both;
}

@keyframes pageEnter {
    from {
        opacity: 0;
        transform: translateY(18px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== 通用 ========== */
.skip-link {
    position: absolute;
    top: -48px;
    left: 16px;
    background: var(--primary);
    color: #fff;
    padding: 10px 16px;
    z-index: 10000;
    border-radius: 8px;
    text-decoration: none;
    transition: top 0.25s;
}

.skip-link:focus { top: 12px; }

.container {
    width: min(100% - 48px, var(--max));
    margin-inline: auto;
}

/* ========== 导航 ========== */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 50;
    transition: background 0.35s var(--ease), box-shadow 0.35s, border-color 0.35s;
    border-bottom: 1px solid transparent;
    background: transparent;
}

header.is-scrolled {
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(16px) saturate(1.2);
    -webkit-backdrop-filter: blur(16px) saturate(1.2);
    border-bottom-color: var(--border);
    box-shadow: 0 10px 40px rgba(10, 22, 40, 0.06);
}

header.is-scrolled .nav-links a,
header.is-scrolled .logo-text,
header.is-scrolled .mobile-menu-btn,
header.is-scrolled .back-btn {
    color: var(--ink);
}

header.nav-light .nav-links a,
header.nav-light .logo-text,
header.nav-light .mobile-menu-btn {
    color: rgba(255, 255, 255, 0.92);
}

header.nav-light.is-scrolled .nav-links a,
header.nav-light.is-scrolled .logo-text,
header.nav-light.is-scrolled .mobile-menu-btn {
    color: var(--ink);
}

nav {
    width: min(100% - 32px, var(--max));
    margin: 0 auto;
    height: var(--nav-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--ink);
    z-index: 2;
}

.logo img {
    width: 42px;
    height: 42px;
    object-fit: contain;
    border-radius: 11px;
    box-shadow: 0 6px 18px rgba(10, 22, 40, 0.15);
}

.logo-text {
    background: linear-gradient(120deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 0.02em;
}

.nav-links-wrapper {
    display: flex;
}

.nav-links {
    display: flex;
    gap: 8px;
    list-style: none;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--ink);
    font-weight: 500;
    font-size: 0.92rem;
    padding: 8px 14px;
    border-radius: 999px;
    position: relative;
    transition: color 0.25s, background 0.25s;
}

.nav-links a:hover {
    color: var(--primary-dark);
    background: var(--primary-soft);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--ink);
    border-radius: 10px;
    transition: color 0.25s, background 0.25s;
}

.mobile-menu-btn:hover {
    background: var(--primary-soft);
    color: var(--primary);
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 999px;
    font-weight: 500;
    font-size: 0.92rem;
    text-decoration: none;
    color: var(--ink);
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(8px);
    transition: all 0.3s var(--ease);
}

.back-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

/* ========== Hero（全幅） ========== */
.hero {
    position: relative;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(var(--nav-h) + 40px) 24px 80px;
    overflow: hidden;
    color: #fff;
    text-align: center;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, rgba(7, 16, 29, 0.55) 0%, rgba(7, 16, 29, 0.72) 45%, rgba(7, 16, 29, 0.9) 100%),
        url('/img/bg-image.webp') center / cover no-repeat;
    transform: scale(1.04);
    animation: heroKen 18s ease-in-out infinite alternate;
}

.hero-glow {
    position: absolute;
    width: 55vw;
    height: 55vw;
    max-width: 680px;
    max-height: 680px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(11, 159, 217, 0.35), transparent 68%);
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
    pointer-events: none;
    filter: blur(10px);
    animation: glowPulse 6s ease-in-out infinite;
}

.hero-content {
    position: relative;
    z-index: 2;
    width: min(100%, 820px);
}

.hero-brand {
    font-family: var(--font-display);
    font-size: clamp(2.4rem, 7vw, 4.4rem);
    font-weight: 800;
    letter-spacing: 0.04em;
    line-height: 1.1;
    margin-bottom: 18px;
    background: linear-gradient(120deg, #fff 20%, #a5e9ff 70%, #7ee8d4 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: fadeUp 0.9s var(--ease) both;
}

.hero h1 {
    font-family: var(--font-display);
    font-size: clamp(1.35rem, 3.2vw, 2rem);
    font-weight: 600;
    line-height: 1.35;
    margin-bottom: 18px;
    color: rgba(255, 255, 255, 0.95);
    letter-spacing: 0.02em;
    animation: fadeUp 0.9s 0.12s var(--ease) both;
}

.hero p {
    font-size: clamp(0.98rem, 2vw, 1.15rem);
    color: rgba(255, 255, 255, 0.72);
    max-width: 560px;
    margin: 0 auto 36px;
    line-height: 1.85;
    animation: fadeUp 0.9s 0.22s var(--ease) both;
}

.cta-group {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeUp 0.9s 0.32s var(--ease) both;
}

.hero-scroll {
    position: absolute;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.75rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    animation: fadeUp 1s 0.5s var(--ease) both;
}

.hero-scroll-line {
    width: 1px;
    height: 42px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.7), transparent);
    animation: scrollLine 1.8s ease-in-out infinite;
}

@keyframes heroKen {
    from { transform: scale(1.04); }
    to { transform: scale(1.12); }
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.7; transform: translateX(-50%) scale(1); }
    50% { opacity: 1; transform: translateX(-50%) scale(1.08); }
}

@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; opacity: 0; }
    40% { transform: scaleY(1); transform-origin: top; opacity: 1; }
    100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 30px;
    border-radius: 999px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: transform 0.3s var(--ease), box-shadow 0.3s, background 0.3s, border-color 0.3s, color 0.3s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #0d8fc4 55%, var(--accent));
    color: #fff;
    box-shadow: 0 10px 30px rgba(11, 159, 217, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 36px rgba(11, 159, 217, 0.45);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.28);
    backdrop-filter: blur(8px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.16);
    transform: translateY(-2px);
}

.btn-outline {
    background: var(--bg-elevated);
    color: var(--ink);
    border: 1px solid var(--border);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

/* ========== 区块 ========== */
section {
    padding: 100px 24px;
}

.section-inner {
    width: min(100%, var(--max));
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-label {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 12px;
}

.section-header h2 {
    font-family: var(--font-display);
    font-size: clamp(1.7rem, 3.2vw, 2.35rem);
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 14px;
    letter-spacing: -0.02em;
}

.section-header p {
    color: var(--text-light);
    font-size: 1.05rem;
    max-width: 560px;
    margin: 0 auto;
}

.services,
.features {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.55), transparent),
        var(--bg);
    position: relative;
}

.services::before,
.features::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(600px 280px at 0% 20%, rgba(11, 159, 217, 0.06), transparent),
        radial-gradient(500px 240px at 100% 80%, rgba(45, 212, 191, 0.06), transparent);
    pointer-events: none;
}

/* 服务网格 — 交互容器，非装饰卡片堆叠 */
.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    position: relative;
}

.service-card {
    background: var(--bg-elevated);
    padding: 36px 28px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: transform 0.4s var(--ease), box-shadow 0.4s, border-color 0.4s;
    position: relative;
    overflow: hidden;
}

.service-card::after {
    content: '';
    position: absolute;
    inset: auto 0 0 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.45s var(--ease);
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(11, 159, 217, 0.2);
}

.service-card:hover::after {
    transform: scaleX(1);
}

.service-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(145deg, rgba(11, 159, 217, 0.12), rgba(45, 212, 191, 0.14));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 20px;
    color: var(--primary);
}

.service-card h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--ink);
}

.service-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.75;
}

/* 关于 */
#about {
    background: var(--bg-elevated);
}

.about-content {
    width: min(100%, var(--max));
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
    align-items: center;
}

.about-text .section-label {
    margin-bottom: 10px;
}

.about-text h2 {
    font-family: var(--font-display);
    font-size: clamp(1.7rem, 3vw, 2.2rem);
    color: var(--ink);
    margin-bottom: 10px;
}

.about-text h3 {
    font-size: 1.15rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 18px;
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 14px;
    line-height: 1.85;
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 36px;
}

.stat-item {
    padding: 18px 12px;
    border-radius: var(--radius);
    background: linear-gradient(180deg, rgba(11, 159, 217, 0.06), transparent);
    border: 1px solid var(--border);
    text-align: center;
}

.stat-item h4 {
    font-family: var(--font-display);
    font-size: 1.85rem;
    color: var(--ink);
    font-weight: 800;
    background: linear-gradient(120deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-item p {
    color: var(--text-light);
    font-size: 0.85rem;
    margin-top: 4px;
    margin-bottom: 0;
}

.about-visual {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-height: 420px;
    box-shadow: var(--shadow-lg);
}

.about-visual::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(160deg, rgba(11, 159, 217, 0.15), transparent 50%);
    pointer-events: none;
}

.about-img {
    width: 100%;
    height: 100%;
    min-height: 420px;
    object-fit: cover;
}

/* 优势 */
.feature-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px 36px;
    position: relative;
}

.feature-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 8px 0;
    transition: transform 0.35s var(--ease);
}

.feature-item:hover {
    transform: translateX(4px);
}

.feature-check {
    width: 30px;
    height: 30px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-weight: 700;
    font-size: 0.8rem;
    box-shadow: 0 8px 18px rgba(11, 159, 217, 0.3);
}

.feature-item h4 {
    font-family: var(--font-display);
    color: var(--ink);
    margin-bottom: 6px;
    font-size: 1.08rem;
}

.feature-item p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* 联系 */
#contact {
    background: var(--bg-elevated);
}

.contact-grid {
    width: min(100%, var(--max));
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.05fr;
    gap: 48px;
    align-items: start;
}

.contact-info h3 {
    font-family: var(--font-display);
    font-size: 1.45rem;
    margin-bottom: 16px;
    color: var(--ink);
}

.contact-item {
    display: flex;
    gap: 16px;
    margin-bottom: 22px;
    align-items: flex-start;
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-soft);
    color: var(--primary);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.2rem;
}

.contact-item h4 {
    color: var(--ink);
    margin-bottom: 4px;
    font-size: 1rem;
    font-family: var(--font-display);
}

.contact-item p {
    color: var(--text-light);
    font-size: 0.95rem;
}

.contact-form {
    background: var(--bg);
    padding: 36px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--ink);
    font-size: 0.92rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 13px 16px;
    border: 1.5px solid var(--border);
    border-radius: 12px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
    background: var(--bg-elevated);
    color: var(--text);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-soft);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

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

.captcha-row input {
    flex: 1;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.captcha-row img {
    height: 46px;
    border-radius: 10px;
    cursor: pointer;
    border: 1px solid var(--border);
    background: var(--bg);
}

.required {
    color: #ef4444;
}

/* ========== 子页 ========== */
.page-header {
    margin-top: var(--nav-h);
    padding: 88px 24px 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(800px 300px at 50% 0%, rgba(11, 159, 217, 0.12), transparent 60%),
        linear-gradient(180deg, #0a1628 0%, #12243c 100%);
    color: #fff;
}

.page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.04), transparent);
    animation: shimmer 8s linear infinite;
}

@keyframes shimmer {
    from { transform: translateX(-30%); }
    to { transform: translateX(30%); }
}

.page-header h1 {
    font-family: var(--font-display);
    font-size: clamp(1.9rem, 4.5vw, 2.8rem);
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
    letter-spacing: -0.02em;
}

.page-header p {
    color: rgba(255, 255, 255, 0.65);
    font-size: 1.05rem;
    position: relative;
}

.page-content {
    width: min(100% - 48px, 900px);
    margin: 0 auto;
    padding: 60px 0 100px;
}

.page-content.wide {
    width: min(100% - 48px, 1000px);
}

.policy-section,
.terms-section {
    margin-bottom: 44px;
}

.policy-section h2,
.terms-section h2 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid transparent;
    border-image: linear-gradient(90deg, var(--primary), transparent) 1;
}

.policy-section h3,
.terms-section h3 {
    font-size: 1.08rem;
    font-weight: 600;
    color: var(--ink);
    margin: 22px 0 10px;
}

.policy-section p,
.terms-section p,
.policy-section li,
.terms-section li {
    color: var(--text);
    line-height: 1.85;
    margin-bottom: 12px;
}

.policy-section ul,
.terms-section ul {
    margin-left: 22px;
    margin-bottom: 16px;
}

.policy-section li,
.terms-section li {
    margin-bottom: 8px;
}

.policy-section strong,
.terms-section strong {
    color: var(--ink);
}

.update-date,
.highlight-box {
    background: var(--bg-elevated);
    padding: 18px 22px;
    border-radius: var(--radius);
    border-left: 4px solid var(--primary);
    margin-bottom: 36px;
    box-shadow: var(--shadow);
}

.update-date p,
.highlight-box p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* 网站地图 */
.sitemap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.sitemap-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: transform 0.4s var(--ease), box-shadow 0.4s, border-color 0.4s;
}

.sitemap-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(11, 159, 217, 0.22);
}

.sitemap-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 18px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
}

.sitemap-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(145deg, rgba(11, 159, 217, 0.12), rgba(45, 212, 191, 0.14));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.sitemap-card-header h2 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--ink);
}

.sitemap-list {
    list-style: none;
}

.sitemap-list li {
    margin-bottom: 2px;
}

.sitemap-list a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 10px;
    color: var(--text);
    text-decoration: none;
    font-size: 0.95rem;
    transition: all 0.25s var(--ease);
}

.sitemap-list a::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--border);
    border-radius: 50%;
    transition: all 0.25s;
    flex-shrink: 0;
}

.sitemap-list a:hover {
    background: var(--primary-soft);
    color: var(--primary-dark);
    padding-left: 16px;
}

.sitemap-list a:hover::before {
    background: var(--primary);
    transform: scale(1.3);
}

.sitemap-list .external::after {
    content: '↗';
    margin-left: auto;
    color: var(--text-light);
    font-size: 0.8rem;
    opacity: 0;
    transition: opacity 0.25s;
}

.sitemap-list .external:hover::after {
    opacity: 1;
}

.xml-tip {
    background: linear-gradient(135deg, rgba(11, 159, 217, 0.08), rgba(45, 212, 191, 0.08));
    border: 1px solid rgba(11, 159, 217, 0.18);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.xml-tip-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.xml-tip-content {
    flex: 1;
    min-width: 200px;
}

.xml-tip-content h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 4px;
}

.xml-tip-content p {
    color: var(--text-light);
    font-size: 0.9rem;
}

.xml-tip-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: transform 0.3s, box-shadow 0.3s;
}

.xml-tip-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(11, 159, 217, 0.35);
}

/* ========== Footer ========== */
footer {
    background:
        radial-gradient(700px 300px at 20% 0%, rgba(11, 159, 217, 0.18), transparent 55%),
        #07101d;
    color: #fff;
    padding: 64px 24px 28px;
}

.footer-content {
    width: min(100%, var(--max));
    margin: 0 auto 40px;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
}

.footer-brand .logo-text {
    font-family: var(--font-display);
    color: #fff;
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 14px;
    display: block;
    -webkit-text-fill-color: #fff;
    background: none;
}

.footer-brand p {
    color: #94a3b8;
    line-height: 1.75;
    font-size: 0.95rem;
}

.footer-links h4 {
    font-family: var(--font-display);
    color: #fff;
    margin-bottom: 18px;
    font-size: 0.95rem;
}

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

.footer-links li {
    margin-bottom: 11px;
}

.footer-links a {
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.92rem;
    transition: color 0.25s;
}

.footer-links a:hover {
    color: var(--accent);
}

.footer-friends {
    width: min(100%, var(--max));
    margin: 0 auto;
    padding: 28px 0 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-friends-inner h4 {
    font-family: var(--font-display);
    color: #fff;
    font-size: 0.95rem;
    margin-bottom: 14px;
}

.friends-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 22px;
    align-items: center;
}

.friends-links a {
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.25s;
}

.friends-links a:hover {
    color: #7dd3fc;
}

.footer-bottom {
    width: min(100%, var(--max));
    margin: 0 auto;
    padding-top: 26px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-bottom p {
    color: #64748b;
    font-size: 0.88rem;
}

.footer-bottom a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.25s;
}

.footer-bottom a:hover {
    color: #fff;
}

footer.footer-simple {
    padding: 36px 24px;
}

/* 滚动显现 */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

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

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

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --nav-h: 68px;
    }

    .nav-links-wrapper {
        position: fixed;
        top: var(--nav-h);
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.96);
        backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border);
        padding: 0 24px;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s var(--ease), padding 0.4s;
        box-shadow: var(--shadow);
    }

    .nav-links-wrapper.active {
        max-height: 420px;
        padding: 12px 24px 20px;
    }

    .nav-links {
        flex-direction: column;
        gap: 0;
        width: 100%;
        align-items: stretch;
    }

    .nav-links li {
        border-bottom: 1px solid var(--border);
    }

    .nav-links li:last-child {
        border-bottom: none;
    }

    .nav-links a {
        display: block;
        padding: 14px 8px;
        font-size: 1rem;
        color: var(--ink) !important;
        border-radius: 10px;
    }

    .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        color: inherit;
    }

    header.nav-light:not(.is-scrolled) .mobile-menu-btn {
        color: #fff;
    }

    .hero {
        min-height: 92vh;
        padding: calc(var(--nav-h) + 48px) 20px 72px;
    }

    .hero-brand {
        letter-spacing: 0.02em;
    }

    .about-content,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .about-visual,
    .about-img {
        min-height: 260px;
    }

    .about-visual {
        order: -1;
    }

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

    .service-grid,
    .feature-list,
    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    section {
        padding: 72px 20px;
    }

    .contact-form {
        padding: 24px 20px;
    }

    .page-header {
        padding: 64px 20px 40px;
    }

    .page-content,
    .page-content.wide {
        width: min(100% - 40px, 900px);
        padding: 40px 0 72px;
    }

    .xml-tip {
        flex-direction: column;
        text-align: center;
    }

    .logo-text.nav-brand-text {
        font-size: 0.95rem;
    }
}

/* ========== 服务流程 ========== */
.workflow-timeline {
    list-style: none;
    position: relative;
    margin: 0;
    padding: 8px 0 0;
}

.workflow-timeline::before {
    content: "";
    position: absolute;
    left: 27px;
    top: 12px;
    bottom: 12px;
    width: 2px;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    opacity: 0.35;
}

.workflow-step {
    position: relative;
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 20px 28px;
    padding: 0 0 40px;
}

.workflow-step:last-child {
    padding-bottom: 0;
}

.workflow-num {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 0.95rem;
    letter-spacing: 0.04em;
    color: #fff;
    background: linear-gradient(135deg, var(--primary), #0d8fc4 55%, var(--accent));
    box-shadow: 0 10px 24px rgba(11, 159, 217, 0.28);
    position: relative;
    z-index: 1;
}

.workflow-body h2 {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--ink);
    margin: 8px 0 10px;
}

.workflow-body p {
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.85;
    max-width: 52ch;
}

.workflow-cta {
    margin-top: 56px;
    text-align: center;
    padding: 44px 28px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    background:
        radial-gradient(520px 200px at 50% 0%, rgba(11, 159, 217, 0.12), transparent 60%),
        var(--bg-elevated);
}

.workflow-cta h3 {
    font-family: var(--font-display);
    font-size: 1.45rem;
    color: var(--ink);
    margin-bottom: 10px;
}

.workflow-cta p {
    color: var(--text-light);
    margin-bottom: 22px;
}

@media (max-width: 768px) {
    .workflow-timeline::before {
        left: 21px;
    }

    .workflow-step {
        grid-template-columns: 44px 1fr;
        gap: 14px 16px;
        padding-bottom: 32px;
    }

    .workflow-num {
        width: 44px;
        height: 44px;
        font-size: 0.82rem;
    }

    .workflow-body h2 {
        font-size: 1.2rem;
        margin-top: 6px;
    }
}

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

    .cta-group .btn {
        width: 100%;
    }

    .captcha-row {
        flex-direction: column;
        align-items: stretch;
    }

    .captcha-row img {
        width: 100%;
        height: 48px;
        object-fit: cover;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html { scroll-behavior: auto; }

    .hero-bg { animation: none; }
    .page-enter { animation: none; }
    .reveal { opacity: 1; transform: none; }
}

@media print {
    .page-loader,
    .page-transition,
    header,
    .cta-group,
    .contact-form,
    footer,
    .hero-scroll {
        display: none !important;
    }

    .hero {
        min-height: auto;
        color: #000;
    }

    .hero-bg { display: none; }
}