:root {
    --primary: #ff6b35;
    --primary-dark: #e55a2b;
    --primary-light: #ff8c5a;
    --primary-glow: rgba(255, 107, 53, 0.35);
    --secondary: #2d3e50;
    --accent: #ffb347;
    --bg: #f7f5f2;
    --bg-gradient: linear-gradient(135deg, #fff5ef 0%, #f7f5f2 45%, #f0f4f8 100%);
    --card-bg: rgba(255, 255, 255, 0.72);
    --card-solid: #ffffff;
    --glass-bg: rgba(255, 255, 255, 0.55);
    --glass-border: rgba(255, 255, 255, 0.65);
    --text: #1e2a36;
    --text-secondary: #5a6b7c;
    --border: rgba(232, 226, 218, 0.9);
    --shadow-sm: 0 2px 10px rgba(45, 62, 80, 0.05);
    --shadow: 0 8px 30px rgba(45, 62, 80, 0.08);
    --shadow-lg: 0 18px 50px rgba(45, 62, 80, 0.12);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
    --transition: 0.35s cubic-bezier(0.25, 0.8, 0.35, 1);
    --blur: 16px;
}

body.dark {
    --primary: #ff7f4d;
    --primary-dark: #ff6b35;
    --primary-light: #ffa375;
    --primary-glow: rgba(255, 127, 77, 0.3);
    --secondary: #0d1117;
    --accent: #ffc46b;
    --bg: #0e1319;
    --bg-gradient: linear-gradient(135deg, #141c26 0%, #0e1319 50%, #101820 100%);
    --card-bg: rgba(28, 36, 46, 0.72);
    --card-solid: #1c242e;
    --glass-bg: rgba(28, 36, 46, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --text: #eef2f6;
    --text-secondary: #9aa8b6;
    --border: rgba(45, 58, 71, 0.9);
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.25);
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 18px 50px rgba(0, 0, 0, 0.5);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    background: var(--bg);
    background-image: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text);
    line-height: 1.7;
    transition: background var(--transition), color var(--transition);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

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

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

ul, ol {
    list-style: none;
}

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

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-light), var(--primary));
    border-radius: 10px;
    border: 2px solid transparent;
    background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
    background-clip: padding-box;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

/* ============ 导航栏 ============ */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--blur)) saturate(180%);
    backdrop-filter: blur(var(--blur)) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm);
    transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.45rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.5px;
    flex-shrink: 0;
    transition: transform var(--transition);
}

.logo:hover {
    transform: scale(1.03);
    color: var(--primary);
}

.logo svg {
    width: 38px;
    height: 38px;
    filter: drop-shadow(0 4px 10px var(--primary-glow));
    transition: transform var(--transition);
}

.logo:hover svg {
    transform: rotate(-6deg) scale(1.05);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-wrap: wrap;
}

.nav-links a {
    position: relative;
    color: var(--text-secondary);
    font-size: 0.92rem;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: 50px;
    transition: all var(--transition);
    white-space: nowrap;
}

.nav-links a::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 2px;
    width: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transform: translateX(-50%);
    transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
    background: rgba(255, 107, 53, 0.08);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 40%;
}

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

.search-box {
    display: flex;
    align-items: center;
    background: var(--glass-bg);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 4px 4px 4px 16px;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.search-box:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-glow);
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    font-size: 0.88rem;
    color: var(--text);
    width: 150px;
    padding: 6px 0;
}

.search-box input::placeholder {
    color: var(--text-secondary);
    opacity: 0.8;
}

.search-box button {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-radius: 50px;
    padding: 7px 16px;
    font-size: 0.84rem;
    font-weight: 600;
    transition: all var(--transition);
    box-shadow: 0 4px 12px var(--primary-glow);
}

.search-box button:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px var(--primary-glow);
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    transition: all var(--transition);
}

.theme-toggle:hover {
    color: var(--primary);
    border-color: var(--primary);
    transform: rotate(20deg) scale(1.05);
    box-shadow: 0 0 0 4px var(--primary-glow);
}

.mobile-menu-btn {
    display: none;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: var(--glass-bg);
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 1.3rem;
    transition: all var(--transition);
}

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

/* ============ 面包屑 ============ */
.breadcrumb {
    padding: 20px 0 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.breadcrumb ol {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.breadcrumb li:not(:last-child)::after {
    content: "/";
    margin-left: 6px;
    color: var(--border);
}

.breadcrumb a {
    color: var(--text-secondary);
    transition: color var(--transition);
}

.breadcrumb a:hover {
    color: var(--primary);
}

/* ============ 首屏 Banner ============ */
.hero {
    position: relative;
    padding: 56px 0 72px;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: -180px;
    right: -120px;
    width: 520px;
    height: 520px;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}

.hero::after {
    content: "";
    position: absolute;
    bottom: -200px;
    left: -140px;
    width: 460px;
    height: 460px;
    background: radial-gradient(circle, rgba(45, 62, 80, 0.12) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}

.hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
    align-items: center;
}

.hero-content h1 {
    font-size: 2.7rem;
    line-height: 1.28;
    font-weight: 800;
    letter-spacing: -1.2px;
    margin-bottom: 20px;
    color: var(--text);
    animation: fadeSlideUp 0.8s ease both;
}

.hero-content h1 span {
    background: linear-gradient(120deg, var(--primary) 0%, var(--accent) 55%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.hero-content .lead {
    font-size: 1.08rem;
    color: var(--text-secondary);
    margin-bottom: 28px;
    line-height: 1.85;
    max-width: 560px;
    animation: fadeSlideUp 0.8s ease 0.1s both;
}

.hero-cta {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 34px;
    animation: fadeSlideUp 0.8s ease 0.2s both;
}

.btn-primary {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
    padding: 13px 30px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition);
    box-shadow: 0 8px 24px var(--primary-glow);
    overflow: hidden;
    isolation: isolate;
}

.btn-primary::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    opacity: 0;
    transition: opacity var(--transition);
    z-index: -1;
}

.btn-primary:hover {
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 14px 32px var(--primary-glow);
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-primary svg {
    transition: transform var(--transition);
}

.btn-primary:hover svg {
    transform: translateX(4px);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--glass-bg);
    color: var(--text);
    padding: 13px 30px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    border: 2px solid var(--border);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    transition: all var(--transition);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 10px 26px rgba(255, 107, 53, 0.15);
}

.hero-stats {
    display: flex;
    gap: 36px;
    flex-wrap: wrap;
    animation: fadeSlideUp 0.8s ease 0.3s both;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.9rem;
    font-weight: 800;
    line-height: 1.2;
    background: linear-gradient(120deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.hero-visual {
    position: relative;
    animation: fadeSlideUp 0.8s ease 0.15s both;
}

.hero-svg-wrap {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

/* ============ 轮播 ============ */
.carousel {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: var(--card-bg);
    -webkit-backdrop-filter: blur(var(--blur)) saturate(180%);
    backdrop-filter: blur(var(--blur)) saturate(180%);
    border: 1px solid var(--glass-border);
}

.carousel::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.4), transparent 40%, rgba(255, 179, 71, 0.3));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.carousel-track {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.65, 0, 0.35, 1);
}

.carousel-slide {
    min-width: 100%;
    padding: 36px 32px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 14px;
}

.carousel-slide svg {
    width: 100%;
    max-width: 320px;
    height: 200px;
    border-radius: var(--radius-sm);
    transition: transform var(--transition);
}

.carousel-slide:hover svg {
    transform: scale(1.04);
}

.carousel-slide h3 {
    font-size: 1.22rem;
    color: var(--text);
    font-weight: 700;
}

.carousel-slide p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    padding: 0 0 22px;
}

.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border);
    transition: all var(--transition);
    cursor: pointer;
}

.carousel-dot:hover {
    background: var(--primary-light);
}

.carousel-dot.active {
    background: linear-gradient(90deg, var(--primary), var(--accent));
    width: 26px;
    border-radius: 4px;
}

/* ============ 通用区块 ============ */
.section {
    padding: 72px 0;
    position: relative;
}

.section-alt {
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 48px;
}

.section-header h2 {
    font-size: 2.05rem;
    font-weight: 800;
    letter-spacing: -0.6px;
    margin-bottom: 12px;
    color: var(--text);
    position: relative;
    display: inline-block;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.02rem;
}

.section-header .divider {
    width: 64px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
    margin: 18px auto 0;
    box-shadow: 0 4px 12px var(--primary-glow);
}

/* ============ 卡片网格 ============ */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

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

.card {
    position: relative;
    background: var(--card-bg);
    -webkit-backdrop-filter: blur(var(--blur)) saturate(160%);
    backdrop-filter: blur(var(--blur)) saturate(160%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 30px 26px;
    transition: all var(--transition);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.14), rgba(255, 179, 71, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    color: var(--primary);
    transition: all var(--transition);
}

.card:hover .card-icon {
    transform: scale(1.1) rotate(-6deg);
    box-shadow: 0 8px 20px var(--primary-glow);
}

.card h3 {
    font-size: 1.16rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text);
}

.card p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.75;
}

/* ============ 文章列表 ============ */
.article-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.article-card {
    position: relative;
    background: var(--card-bg);
    -webkit-backdrop-filter: blur(var(--blur)) saturate(160%);
    backdrop-filter: blur(var(--blur)) saturate(160%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 26px;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.article-card::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition);
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.article-card:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.article-tag {
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.14), rgba(255, 179, 71, 0.12));
    color: var(--primary);
    padding: 3px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid rgba(255, 107, 53, 0.15);
}

.article-card h3 {
    font-size: 1.08rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1.55;
    transition: color var(--transition);
}

.article-card:hover h3 {
    color: var(--primary);
}

.article-card p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.75;
    flex: 1;
}

.article-link {
    font-size: 0.86rem;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap var(--transition);
}

.article-link:hover {
    gap: 8px;
}

/* ============ FAQ ============ */
.faq-list {
    max-width: 880px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.faq-item {
    background: var(--card-bg);
    -webkit-backdrop-filter: blur(var(--blur));
    backdrop-filter: blur(var(--blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: all var(--transition);
    box-shadow: var(--shadow-sm);
}

.faq-item:hover {
    border-color: var(--primary-light);
}

.faq-item.open {
    border-color: var(--primary);
    box-shadow: 0 8px 28px var(--primary-glow);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    font-size: 0.98rem;
    font-weight: 600;
    color: var(--text);
    text-align: left;
    transition: color var(--transition);
}

.faq-question:hover {
    color: var(--primary);
}

.faq-question .faq-icon {
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1;
    transition: all var(--transition);
}

.faq-item.open .faq-icon {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-color: transparent;
    color: #fff;
    transform: rotate(45deg);
    box-shadow: 0 4px 12px var(--primary-glow);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 24px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.85;
}

.faq-item.open .faq-answer {
    max-height: 600px;
    padding: 0 24px 22px;
}

/* ============ HowTo ============ */
.howto-steps {
    max-width: 880px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.howto-step {
    position: relative;
    display: flex;
    gap: 22px;
    background: var(--card-bg);
    -webkit-backdrop-filter: blur(var(--blur));
    backdrop-filter: blur(var(--blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 26px;
    transition: all var(--transition);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.howto-step::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    transform: scaleY(0);
    transform-origin: top;
    transition: transform var(--transition);
}

.howto-step:hover {
    transform: translateX(6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.howto-step:hover::before {
    transform: scaleY(1);
}

.step-number {
    flex-shrink: 0;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    box-shadow: 0 6px 18px var(--primary-glow);
    transition: transform var(--transition);
}

.howto-step:hover .step-number {
    transform: scale(1.1) rotate(-8deg);
}

.step-content h3 {
    font-size: 1.06rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text);
}

.step-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.75;
}

/* ============ 团队 ============ */
.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.team-card {
    text-align: center;
    background: var(--card-bg);
    -webkit-backdrop-filter: blur(var(--blur)) saturate(160%);
    backdrop-filter: blur(var(--blur)) saturate(160%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 30px 18px;
    transition: all var(--transition);
    box-shadow: var(--shadow-sm);
}

.team-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.team-avatar {
    width: 86px;
    height: 86px;
    border-radius: 50%;
    margin: 0 auto 16px;
    overflow: hidden;
    border: 3px solid transparent;
    background: linear-gradient(135deg, var(--primary), var(--accent)) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    transition: transform var(--transition);
}

.team-card:hover .team-avatar {
    transform: scale(1.06);
}

.team-card h3 {
    font-size: 1.02rem;
    font-weight: 700;
    color: var(--text);
}

.team-card .role {
    font-size: 0.82rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 8px;
}

.team-card p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* ============ 案例评价 ============ */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.testimonial-card {
    position: relative;
    background: var(--card-bg);
    -webkit-backdrop-filter: blur(var(--blur)) saturate(160%);
    backdrop-filter: blur(var(--blur)) saturate(160%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 30px 26px;
    transition: all var(--transition);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.testimonial-card::before {
    content: "\201C";
    position: absolute;
    top: 6px;
    right: 20px;
    font-size: 4.5rem;
    line-height: 1;
    color: var(--primary);
    opacity: 0.12;
    font-family: Georgia, serif;
    pointer-events: none;
}

.testimonial-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.testimonial-quote {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.85;
    margin-bottom: 20px;
    font-style: italic;
    position: relative;
    z-index: 1;
}

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

.testimonial-avatar {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    border: 2px solid var(--border);
    transition: border-color var(--transition);
}

.testimonial-card:hover .testimonial-avatar {
    border-color: var(--primary);
}

.testimonial-author strong {
    display: block;
    font-size: 0.9rem;
    color: var(--text);
}

.testimonial-author span {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

/* ============ 联系我们 ============ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 44px;
    align-items: start;
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    transition: transform var(--transition);
}

.contact-item:hover {
    transform: translateX(6px);
}

.contact-icon {
    flex-shrink: 0;
    width: 46px;
    height: 46px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.14), rgba(255, 179, 71, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transition: all var(--transition);
}

.contact-item:hover .contact-icon {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 8px 20px var(--primary-glow);
}

.contact-item h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 3px;
}

.contact-item p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

.contact-map {
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--card-bg);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    background: var(--card-bg);
    -webkit-backdrop-filter: blur(var(--blur)) saturate(160%);
    backdrop-filter: blur(var(--blur)) saturate(160%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow-sm);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 13px 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--glass-bg);
    color: var(--text);
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.75;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-glow);
    background: var(--card-solid);
}

.contact-form textarea {
    min-height: 130px;
    resize: vertical;
}

/* ============ 页脚 ============ */
.footer {
    position: relative;
    background: linear-gradient(160deg, var(--secondary) 0%, #1a2531 100%);
    color: #b8c4d0;
    padding: 68px 0 0;
    margin-top: 48px;
    overflow: hidden;
}

.footer::before {
    content: "";
    position: absolute;
    top: -120px;
    right: -80px;
    width: 360px;
    height: 360px;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.18) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

body.dark .footer {
    background: linear-gradient(160deg, #0d1117 0%, #070a0e 100%);
}

.footer-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 44px;
    padding-bottom: 44px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .logo {
    color: #fff;
    margin-bottom: 18px;
}

.footer-brand p {
    font-size: 0.88rem;
    line-height: 1.85;
    color: #8a9baa;
    margin-bottom: 18px;
}

.footer-social {
    display: flex;
    gap: 10px;
}

.footer-social a {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #b8c4d0;
    transition: all var(--transition);
}

.footer-social a:hover {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px var(--primary-glow);
}

.footer-col h4 {
    color: #fff;
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 28px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 11px;
}

.footer-col a {
    color: #8a9baa;
    font-size: 0.85rem;
    transition: color var(--transition), padding-left var(--transition);
    display: inline-block;
}

.footer-col a:hover {
    color: var(--primary-light);
    padding-left: 5px;
}

.footer-bottom {
    position: relative;
    z-index: 1;
    padding: 26px 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 14px;
    font-size: 0.8rem;
    color: #6b7c8c;
}

.footer-bottom-links {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
}

.footer-bottom-links a {
    color: #6b7c8c;
    transition: color var(--transition);
}

.footer-bottom-links a:hover {
    color: var(--primary-light);
}

/* ============ 返回顶部 ============ */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px var(--primary-glow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.9);
    transition: all var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 14px 32px var(--primary-glow);
}

/* ============ 滚动动画 ============ */
.reveal {
    opacity: 0;
    transform: translateY(34px);
    transition: opacity 0.8s cubic-bezier(0.25, 0.8, 0.35, 1), transform 0.8s cubic-bezier(0.25, 0.8, 0.35, 1);
    will-change: opacity, transform;
}

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

@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(28px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes floatSoft {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .hero-content h1 {
        font-size: 2.3rem;
    }
    .hero-content .lead {
        max-width: 100%;
    }
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
    }
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--glass-bg);
        -webkit-backdrop-filter: blur(var(--blur)) saturate(180%);
        backdrop-filter: blur(var(--blur)) saturate(180%);
        border-bottom: 1px solid var(--glass-border);
        flex-direction: column;
        padding: 18px 24px;
        gap: 6px;
        box-shadow: var(--shadow-lg);
        animation: fadeSlideUp 0.3s ease both;
    }
    .nav-links.open {
        display: flex;
    }
    .nav-links a {
        width: 100%;
        padding: 12px 14px;
    }
    .nav-links a::after {
        display: none;
    }
    .mobile-menu-btn {
        display: flex;
    }
    .search-box input {
        width: 110px;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 40px 0 56px;
    }
    .hero-content h1 {
        font-size: 2rem;
    }
    .section {
        padding: 56px 0;
    }
    .section-header h2 {
        font-size: 1.75rem;
    }
    .carousel-slide {
        padding: 28px 22px 20px;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 18px;
    }
    .grid-3,
    .grid-2,
    .article-list,
    .team-grid,
    .testimonial-grid {
        grid-template-columns: 1fr;
    }
    .hero-content h1 {
        font-size: 1.72rem;
        letter-spacing: -0.6px;
    }
    .hero-content .lead {
        font-size: 0.98rem;
    }
    .section {
        padding: 46px 0;
    }
    .section-header h2 {
        font-size: 1.5rem;
    }
    .section-header {
        margin-bottom: 34px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .hero-stats {
        gap: 22px;
    }
    .stat-number {
        font-size: 1.5rem;
    }
    .search-box {
        display: none;
    }
    .nav-actions {
        gap: 8px;
    }
    .howto-step {
        flex-direction: column;
        gap: 14px;
        padding: 22px;
    }
    .howto-step:hover {
        transform: translateY(-4px);
    }
    .btn-primary,
    .btn-outline {
        padding: 12px 24px;
        font-size: 0.94rem;
    }
    .hero-cta {
        gap: 10px;
    }
    .back-to-top {
        bottom: 22px;
        right: 22px;
        width: 46px;
        height: 46px;
    }
    .contact-form {
        padding: 24px;
    }
    .card {
        padding: 26px 22px;
    }
    .article-card {
        padding: 22px;
    }
    .faq-question {
        padding: 17px 18px;
        font-size: 0.94rem;
    }
    .faq-answer {
        padding: 0 18px;
    }
    .faq-item.open .faq-answer {
        padding: 0 18px 18px;
    }
    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 400px) {
    .hero-content h1 {
        font-size: 1.5rem;
    }
    .nav-container {
        height: 64px;
    }
    .nav-links {
        top: 64px;
    }
    .logo {
        font-size: 1.25rem;
    }
    .logo svg {
        width: 32px;
        height: 32px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    .reveal {
        opacity: 1;
        transform: none;
    }
}

@media print {
    .navbar,
    .back-to-top,
    .footer-social,
    .carousel-dots {
        display: none;
    }
    body {
        background: #fff;
        color: #000;
    }
}