/* ==================== 设计系统 ==================== */
:root {
    /* 色彩系统 - 深色+金色律所调性 */
    --primary: #1a1a2e;
    --primary-light: #2d2d4a;
    --accent: #c9a84c;
    --accent-light: #d4b85e;
    --accent-dark: #b89535;
    --gold-gradient: linear-gradient(135deg, #c9a84c 0%, #e8d5a3 50%, #c9a84c 100%);
    
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a68;
    --text-muted: #8e8ea0;
    --text-light: #f5f3ef;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8f7f4;
    --bg-tertiary: #f0ede6;
    --bg-dark: #1a1a2e;
    --bg-darker: #12121f;
    
    --border: rgba(26, 26, 46, 0.08);
    --border-light: rgba(26, 26, 46, 0.04);
    
    /* 字体 */
    --font-serif: 'Noto Serif SC', 'Songti SC', serif;
    --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    
    /* 间距 */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-24: 96px;
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(26, 26, 46, 0.04);
    --shadow-md: 0 4px 16px rgba(26, 26, 46, 0.06);
    --shadow-lg: 0 8px 32px rgba(26, 26, 46, 0.08);
    --shadow-xl: 0 16px 48px rgba(26, 26, 46, 0.12);
    
    /* 动效 */
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-standard: cubic-bezier(0.2, 0, 0, 1);
    --duration-fast: 150ms;
    --duration-normal: 300ms;
    --duration-slow: 500ms;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--bg-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--duration-fast) ease;
}

ul {
    list-style: none;
}

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

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    border: none;
    outline: none;
    background: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: all var(--duration-normal) ease;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--primary);
    transition: opacity var(--duration-fast) ease;
}

.logo:hover {
    opacity: 0.8;
}

.logo-icon {
    color: var(--accent);
}

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

.logo-name {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    line-height: 1.2;
}

.logo-sub {
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-link {
    padding: var(--space-2) var(--space-4);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast) ease;
    position: relative;
}

.nav-link:hover {
    color: var(--primary);
    background: var(--bg-secondary);
}

.nav-link.active {
    color: var(--accent-dark);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.nav-phone {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    transition: color var(--duration-fast) ease;
}

.nav-phone:hover {
    color: var(--accent-dark);
}

.nav-phone svg {
    color: var(--accent);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 24px;
    cursor: pointer;
    padding: var(--space-2);
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
    transition: all var(--duration-normal) ease;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ==================== 按钮系统 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 var(--space-8);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--duration-fast) ease;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-dark);
    box-shadow: 0 2px 8px rgba(201, 168, 76, 0.3);
}

.btn-primary:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(201, 168, 76, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-outline {
    border: 1.5px solid var(--accent);
    color: var(--accent-dark);
}

.btn-outline:hover {
    background: var(--accent);
    color: var(--bg-dark);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

/* ==================== 英雄区域 ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 72px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: var(--bg-dark);
}

.hero-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(201, 168, 76, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(201, 168, 76, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 50% 80%, rgba(201, 168, 76, 0.04) 0%, transparent 60%);
}

.hero-gradient {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(to bottom, transparent, var(--bg-dark));
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    padding: var(--space-8);
}

.hero-badge {
    display: inline-block;
    padding: var(--space-2) var(--space-5);
    background: rgba(201, 168, 76, 0.15);
    border: 1px solid rgba(201, 168, 76, 0.3);
    border-radius: 50px;
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-8);
    animation: fadeInUp 0.8s var(--ease-standard) both;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    color: var(--text-light);
    line-height: 1.2;
    margin-bottom: var(--space-6);
    animation: fadeInUp 0.8s var(--ease-standard) 0.1s both;
}

.hero-title-line {
    display: block;
}

.hero-title-line:last-child {
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: var(--space-12);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s var(--ease-standard) 0.2s both;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
    margin-bottom: var(--space-10);
    animation: fadeInUp 0.8s var(--ease-standard) 0.3s both;
}

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

.stat-number {
    font-family: var(--font-serif);
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 700;
    color: var(--accent);
    display: inline;
}

.stat-suffix {
    font-family: var(--font-serif);
    font-size: clamp(1rem, 2vw, 1.5rem);
    font-weight: 600;
    color: var(--accent);
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: var(--space-1);
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s var(--ease-standard) 0.4s both;
}

.hero-actions .btn-outline {
    border-color: rgba(201, 168, 76, 0.5);
    color: var(--accent);
}

.hero-actions .btn-outline:hover {
    background: var(--accent);
    color: var(--bg-dark);
    border-color: var(--accent);
}

.hero-scroll {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-muted);
    font-size: 0.75rem;
    animation: fadeIn 1s ease 1s both;
}

.scroll-indicator {
    width: 20px;
    height: 32px;
    border: 2px solid rgba(201, 168, 76, 0.3);
    border-radius: 10px;
    position: relative;
}

.scroll-indicator::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 8px;
    background: var(--accent);
    border-radius: 2px;
    animation: scrollDown 1.5s ease infinite;
}

@keyframes scrollDown {
    0%, 100% { opacity: 1; transform: translateX(-50%) translateY(0); }
    50% { opacity: 0.5; transform: translateX(-50%) translateY(8px); }
}

/* ==================== 通用区块 ==================== */
.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-tag {
    display: inline-block;
    padding: var(--space-1) var(--space-4);
    background: rgba(201, 168, 76, 0.1);
    color: var(--accent-dark);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    border-radius: 50px;
    margin-bottom: var(--space-4);
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--space-4);
    line-height: 1.3;
}

.section-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ==================== 优势介绍 ==================== */
.advantages {
    padding: var(--space-24) 0;
    background: var(--bg-secondary);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

.advantage-card {
    background: var(--bg-primary);
    padding: var(--space-8);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--duration-normal) var(--ease-standard);
    border: 1px solid var(--border-light);
}

.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(201, 168, 76, 0.2);
}

.advantage-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-6);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(201, 168, 76, 0.1);
    border-radius: var(--radius-lg);
    color: var(--accent-dark);
}

.advantage-card h3 {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: var(--primary);
}

.advantage-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==================== 业务领域 ==================== */
.services {
    padding: var(--space-24) 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.service-card {
    position: relative;
    background: var(--bg-primary);
    padding: var(--space-8);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: all var(--duration-normal) var(--ease-standard);
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gold-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--duration-normal) var(--ease-standard);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(201, 168, 76, 0.2);
}

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

.service-number {
    position: absolute;
    top: var(--space-5);
    right: var(--space-5);
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: rgba(201, 168, 76, 0.1);
    line-height: 1;
}

.service-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(201, 168, 76, 0.1);
    border-radius: var(--radius-md);
    color: var(--accent-dark);
    margin-bottom: var(--space-5);
}

.service-card h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--space-3);
}

.service-card > p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-5);
}

.service-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
}

.service-list li {
    padding: var(--space-1) var(--space-3);
    background: var(--bg-secondary);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.service-link {
    display: inline-flex;
    align-items: center;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-dark);
    transition: gap var(--duration-fast) ease;
    gap: var(--space-1);
}

.service-link:hover {
    gap: var(--space-2);
    color: var(--accent);
}

/* ==================== 律师团队 ==================== */
.team {
    padding: var(--space-24) 0;
    background: var(--bg-dark);
}

.team .section-tag {
    background: rgba(201, 168, 76, 0.2);
}

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

.team .section-desc {
    color: var(--text-muted);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
    margin-bottom: var(--space-12);
}

.team-card {
    background: var(--bg-darker);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--duration-normal) var(--ease-standard);
    border: 1px solid rgba(201, 168, 76, 0.1);
}

.team-card:hover {
    transform: translateY(-8px);
    border-color: rgba(201, 168, 76, 0.3);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
}

.team-avatar {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-light), var(--bg-darker));
    display: flex;
    align-items: center;
    justify-content: center;
}

.avatar-placeholder {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(201, 168, 76, 0.2);
    border: 2px solid var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
}

.team-info {
    padding: var(--space-6);
}

.team-info h3 {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: var(--space-1);
}

.team-title {
    display: block;
    font-size: 0.8rem;
    color: var(--accent);
    margin-bottom: var(--space-3);
}

.team-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: var(--space-4);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.team-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.team-tags span {
    padding: var(--space-1) var(--space-3);
    background: rgba(201, 168, 76, 0.1);
    border: 1px solid rgba(201, 168, 76, 0.2);
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--accent);
}

.team-more {
    text-align: center;
}

.team-more .btn-outline {
    border-color: rgba(201, 168, 76, 0.5);
    color: var(--accent);
}

.team-more .btn-outline:hover {
    background: var(--accent);
    color: var(--bg-dark);
}

/* ==================== 经典案例 ==================== */
.cases {
    padding: var(--space-24) 0;
    background: var(--bg-secondary);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.case-card {
    background: var(--bg-primary);
    padding: var(--space-8);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: all var(--duration-normal) var(--ease-standard);
    position: relative;
    overflow: hidden;
}

.case-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gold-gradient);
    opacity: 0;
    transition: opacity var(--duration-normal) ease;
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.case-card:hover::after {
    opacity: 1;
}

.case-tag {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    background: rgba(201, 168, 76, 0.1);
    color: var(--accent-dark);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 50px;
    margin-bottom: var(--space-4);
}

.case-card h3 {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--space-3);
    line-height: 1.4;
}

.case-card > p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-5);
}

.case-result {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-3);
}

.result-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.result-value {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-dark);
}

.case-amount {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ==================== 法律资讯 ==================== */
.news {
    padding: var(--space-24) 0;
}

.news-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
}

.news-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all var(--duration-normal) var(--ease-standard);
}

.news-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.news-featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.news-image {
    height: 240px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
}

.news-featured .news-image {
    height: 100%;
    min-height: 300px;
}

.news-placeholder {
    color: rgba(201, 168, 76, 0.3);
}

.news-content {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
}

.news-date {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: var(--space-3);
}

.news-content h3 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--space-3);
    line-height: 1.5;
}

.news-featured .news-content h3 {
    font-size: 1.3rem;
}

.news-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-4);
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-dark);
    transition: gap var(--duration-fast) ease;
}

.news-link:hover {
    color: var(--accent);
}

/* ==================== 联系我们 ==================== */
.contact {
    padding: var(--space-24) 0;
    background: var(--bg-secondary);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: start;
}

.contact-info {
    padding-right: var(--space-8);
}

.contact-info .section-tag {
    display: inline-block;
}

.contact-info .section-title {
    text-align: left;
    margin-bottom: var(--space-4);
}

.contact-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-10);
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
}

.contact-icon {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(201, 168, 76, 0.1);
    border-radius: var(--radius-md);
    color: var(--accent-dark);
}

.contact-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: var(--space-1);
}

.contact-value {
    font-size: 0.95rem;
    color: var(--primary);
    font-weight: 500;
}

a.contact-value:hover {
    color: var(--accent-dark);
}

/* ==================== 联系表单 ==================== */
.contact-form-wrapper {
    background: var(--bg-primary);
    padding: var(--space-10);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

.contact-form h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--space-6);
}

.form-group {
    margin-bottom: var(--space-5);
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--bg-secondary);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    color: var(--text-primary);
    transition: all var(--duration-fast) ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    background: var(--bg-primary);
    box-shadow: 0 0 0 3px rgba(201, 168, 76, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%238e8ea0' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

.form-note {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: var(--space-4);
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--bg-dark);
    padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--space-10);
    margin-bottom: var(--space-12);
}

.footer-brand .logo {
    margin-bottom: var(--space-5);
    color: var(--text-light);
}

.footer-brand .logo-icon {
    color: var(--accent);
}

.footer-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.8;
}

.footer-links h4,
.footer-contact h4 {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: var(--space-5);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: color var(--duration-fast) ease;
}

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

.footer-contact p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.8;
}

.footer-bottom {
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

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

.footer-bottom a:hover {
    text-decoration: underline;
}

/* ==================== 返回顶部 ==================== */
.back-to-top {
    position: fixed;
    bottom: var(--space-8);
    right: var(--space-8);
    width: 48px;
    height: 48px;
    background: var(--accent);
    color: var(--bg-dark);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--duration-normal) var(--ease-standard);
    box-shadow: 0 4px 16px rgba(201, 168, 76, 0.3);
    z-index: 999;
}

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

.back-to-top:hover {
    background: var(--accent-dark);
    transform: translateY(-4px);
}

/* ==================== 动画 ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 滚动动画 */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s var(--ease-standard);
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* ==================== 响应式 ==================== */
/* 平板 */
@media (max-width: 1024px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--space-6);
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-featured {
        grid-template-columns: 1fr;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        padding-right: 0;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 手机 */
@media (max-width: 768px) {
    .nav-container {
        height: 64px;
    }
    
    .nav-phone span {
        display: none;
    }
    
    .hero {
        min-height: auto;
        padding: 120px 0 80px;
    }
    
    .hero-content {
        padding: var(--space-6);
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-4);
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .hero-scroll {
        display: none;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
    
    .contact-form-wrapper {
        padding: var(--space-6);
    }
}

/* 小屏手机 */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-4);
    }
    
    .section-header {
        margin-bottom: var(--space-10);
    }
    
    .advantages,
    .services,
    .team,
    .cases,
    .news,
    .contact {
        padding: var(--space-16) 0;
    }
    
    .advantage-card,
    .service-card,
    .case-card {
        padding: var(--space-6);
    }
}

/* SEO & Accessibility */
img { max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }