/* ========================================
   怡然智慧物业官网 — 炬华科技风格
   主色：深藏青 #0a3d7c / 金色 #c8a96e
   ======================================== */

/* ---------- CSS 变量 ---------- */
:root {
    --primary: #0a3d7c;
    --primary-dark: #072f5f;
    --primary-light: #1458a8;
    --gold: #c8a96e;
    --gold-light: #d9c08a;
    --gold-dark: #a88a4a;
    --white: #ffffff;
    --gray-50: #f8f9fa;
    --gray-100: #f0f2f5;
    --gray-200: #e2e6ea;
    --gray-300: #cdd2d8;
    --gray-400: #9aa0a6;
    --gray-500: #6c757d;
    --gray-600: #495057;
    --gray-700: #343a40;
    --gray-800: #212529;
    --gray-900: #080812;
    --shadow-sm: 0 2px 8px rgba(0,0,0,.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,.10);
    --shadow-lg: 0 8px 32px rgba(0,0,0,.14);
    --shadow-xl: 0 16px 48px rgba(0,0,0,.18);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --transition: all .3s ease;
    --transition-slow: all .5s ease;
}

/* ---------- Reset ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--gray-700);
    line-height: 1.7;
    background: var(--white);
    overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
::selection { background: var(--primary); color: var(--white); }

/* ---------- 容器 ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ---------- 顶部信息栏 ---------- */
.top-bar {
    background: var(--primary-dark);
    color: rgba(255,255,255,.8);
    font-size: .82rem;
    padding: 8px 0;
    border-bottom: 1px solid rgba(255,255,255,.08);
}
.top-bar .container {
    display: flex; justify-content: space-between; align-items: center;
}
.top-bar-left i { color: var(--gold); margin-right: 6px; }
.top-bar-right a {
    color: rgba(255,255,255,.7);
    margin-left: 24px;
    transition: var(--transition);
}
.top-bar-right a:hover { color: var(--gold); }

/* ---------- 导航栏 ---------- */
.header {
    background: var(--white);
    box-shadow: 0 2px 12px rgba(0,0,0,.06);
    position: sticky; top: 0; z-index: 1000;
    transition: var(--transition);
}
.header .container {
    display: flex; justify-content: space-between; align-items: center;
    height: 80px;
}
.logo a { display: flex; align-items: center; gap: 12px; }
.logo-icon {
    width: 44px; height: 44px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    color: var(--white); font-size: 1.3rem;
}
.logo-text { display: flex; flex-direction: column; }
.logo-title { font-size: 1.2rem; font-weight: 700; color: var(--primary); line-height: 1.2; }
.logo-sub { font-size: .65rem; color: var(--gray-400); letter-spacing: 2px; }

.nav { display: flex; align-items: center; gap: 8px; }
.nav > a, .nav-item-has-dropdown > a {
    padding: 10px 16px;
    font-size: .92rem;
    color: var(--gray-600);
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    display: flex; align-items: center; gap: 4px;
}
.nav > a:hover, .nav-item-has-dropdown > a:hover {
    color: var(--primary);
    background: rgba(10,61,124,.04);
}
.nav > a.active {
    color: var(--primary);
    font-weight: 600;
}
.nav > a.active::after {
    content: "";
    display: block;
    width: 24px; height: 2px;
    background: var(--gold);
    border-radius: 1px;
    margin: 4px auto 0;
}

/* 下拉菜单 */
.nav-item-has-dropdown { position: relative; }
.dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    background: var(--white);
    min-width: 180px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 8px;
    opacity: 0; visibility: hidden;
    transform: translateY(-8px);
    transition: var(--transition);
    z-index: 100;
}
.nav-item-has-dropdown:hover .dropdown {
    opacity: 1; visibility: visible;
    transform: translateY(0);
}
.dropdown a {
    display: block;
    padding: 10px 14px;
    font-size: .88rem;
    color: var(--gray-600);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}
.dropdown a:hover {
    background: rgba(10,61,124,.06);
    color: var(--primary);
    padding-left: 20px;
}

/* 移动端汉堡 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column; gap: 5px;
    padding: 8px;
}
.mobile-menu-toggle span {
    width: 24px; height: 2px;
    background: var(--primary);
    border-radius: 1px;
    transition: var(--transition);
}
.mobile-menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.mobile-menu-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ---------- Banner ---------- */
.banner {
    position: relative;
    min-height: 620px;
    display: flex; flex-direction: column; justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, #050d1f 0%, #0a2040 40%, #0a3d7c 100%);
}
.banner-bg {
    position: absolute; inset: 0;
    background:
        radial-gradient(ellipse 800px 400px at 20% 30%, rgba(10,61,124,.6), transparent),
        radial-gradient(ellipse 600px 300px at 80% 60%, rgba(200,169,110,.15), transparent),
        radial-gradient(ellipse 400px 200px at 50% 80%, rgba(20,88,168,.3), transparent);
}
.banner-bg::after {
    content: "";
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px);
    background-size: 60px 60px;
}
.banner-particles { position: absolute; inset: 0; pointer-events: none; }
.particle {
    position: absolute;
    width: 4px; height: 4px;
    background: rgba(200,169,110,.5);
    border-radius: 50%;
    animation: floatUp linear infinite;
}
@keyframes floatUp {
    0%   { transform: translateY(100vh) scale(0); opacity: 0; }
    10%  { opacity: 1; }
    90%  { opacity: 1; }
    100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}
.banner .container { position: relative; z-index: 2; padding-top: 80px; padding-bottom: 40px; }
.banner-content { max-width: 760px; }
.banner-badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(200,169,110,.12);
    border: 1px solid rgba(200,169,110,.3);
    color: var(--gold-light);
    font-size: .85rem;
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 24px;
}
.banner h1 {
    font-size: clamp(2rem, 5vw, 3.6rem);
    font-weight: 800;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 20px;
}
.banner h1 .highlight {
    background: linear-gradient(135deg, var(--gold), var(--gold-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.banner-sub {
    font-size: 1.08rem;
    color: rgba(255,255,255,.75);
    line-height: 1.9;
    margin-bottom: 36px;
    max-width: 640px;
}
.banner-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* 按钮 */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 32px;
    font-size: .95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}
.btn-primary {
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    color: var(--white);
    box-shadow: 0 4px 16px rgba(200,169,110,.35);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(200,169,110,.45);
}
.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: rgba(255,255,255,.4);
}
.btn-outline:hover {
    background: rgba(255,255,255,.1);
    border-color: var(--white);
}
.btn-gold {
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    color: var(--white);
    box-shadow: 0 4px 16px rgba(200,169,110,.35);
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(200,169,110,.45); }

/* Banner 数据卡 */
.banner-stats {
    position: relative; z-index: 2;
    margin-top: 40px;
    padding-bottom: 60px;
}
.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.stat-card {
    background: rgba(255,255,255,.06);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    text-align: center;
    transition: var(--transition);
}
.stat-card:hover {
    background: rgba(255,255,255,.1);
    transform: translateY(-4px);
}
.stat-number {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--gold);
    line-height: 1.1;
}
.stat-label {
    font-size: .85rem;
    color: rgba(255,255,255,.7);
    margin-top: 6px;
}

/* ---------- 区块公共标题 ---------- */
.section-header {
    text-align: center;
    margin-bottom: 56px;
}
.section-header.light h2 { color: var(--white); }
.section-header.light p { color: rgba(255,255,255,.7); }
.section-eyebrow {
    display: inline-block;
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--gold);
    background: rgba(200,169,110,.08);
    padding: 4px 14px;
    border-radius: 20px;
    margin-bottom: 12px;
}
.section-eyebrow.light { background: rgba(200,169,110,.15); }
.section-header h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 12px;
}
.section-line {
    width: 60px; height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--gold));
    border-radius: 2px;
    margin: 0 auto 16px;
}
.section-line.left { margin-left: 0; }
.section-line.center { margin: 0 auto; }
.section-header p {
    font-size: 1rem;
    color: var(--gray-500);
    max-width: 560px;
    margin: 0 auto;
}

/* ---------- 主营业务三栏 ---------- */
.main-business { padding: 90px 0; background: var(--gray-50); }
.business-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.business-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-bottom: 3px solid transparent;
}
.business-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-bottom-color: var(--gold);
}
.business-icon {
    width: 72px; height: 72px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, rgba(10,61,124,.06), rgba(10,61,124,.12));
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.8rem;
    color: var(--primary);
    transition: var(--transition);
}
.business-card:hover .business-icon {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--white);
    transform: rotateY(180deg);
}
.business-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 12px;
}
.business-card p {
    font-size: .92rem;
    color: var(--gray-500);
    line-height: 1.8;
    margin-bottom: 20px;
}
.learn-more {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: .88rem;
    font-weight: 600;
    color: var(--primary);
    transition: var(--transition);
}
.learn-more:hover { color: var(--gold); gap: 10px; }

/* ---------- 公司简介（左图右文） ---------- */
.about { padding: 90px 0; background: var(--white); }
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 60px;
    align-items: center;
}
.about-image { position: relative; }
.about-img-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-xl);
    display: flex; align-items: center; justify-content: center;
    font-size: 5rem;
    color: rgba(255,255,255,.2);
    box-shadow: var(--shadow-lg);
}
.about-badge {
    position: absolute;
    bottom: -16px; right: -16px;
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    color: var(--white);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    text-align: center;
    font-size: .82rem;
    font-weight: 600;
    line-height: 1.4;
    box-shadow: var(--shadow-md);
    display: flex; align-items: center; gap: 8px;
}
.about-badge i { font-size: 1.4rem; }
.about-text h2 { margin-bottom: 16px; }
.about-text p {
    font-size: .96rem;
    color: var(--gray-500);
    line-height: 1.9;
    margin-bottom: 16px;
}
.about-features { margin: 24px 0; }
.about-features li {
    display: flex; align-items: center; gap: 10px;
    padding: 8px 0;
    font-size: .94rem;
    color: var(--gray-600);
}
.about-features i { color: var(--gold); font-size: 1.1rem; flex-shrink: 0; }

/* ---------- 核心业务详情 ---------- */
.service-detail { padding: 90px 0; background: var(--gray-50); }
.service-block {
    display: flex;
    gap: 32px;
    align-items: flex-start;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 36px 40px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.service-block::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 4px; height: 100%;
    background: linear-gradient(180deg, var(--primary), var(--gold));
    border-radius: 0 0 0 var(--radius-lg);
}
.service-block:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}
.service-block-icon {
    flex-shrink: 0;
    width: 64px; height: 64px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
}
.service-block-content h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}
.service-list { space-y: 6px; }
.service-list li {
    padding: 6px 0;
    font-size: .92rem;
    color: var(--gray-500);
    display: flex; align-items: center; gap: 8px;
}
.service-list i { color: var(--gold); font-size: .8rem; flex-shrink: 0; }

/* ---------- 智慧服务 ---------- */
.smart-service {
    padding: 90px 0;
    background: linear-gradient(135deg, #050d1f 0%, #0a2040 50%, #0a3d7c 100%);
    position: relative;
    overflow: hidden;
}
.smart-service::before {
    content: "";
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.015) 1px, transparent 1px);
    background-size: 50px 50px;
}
.smart-service .container { position: relative; z-index: 1; }
.smart-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.smart-card {
    background: rgba(255,255,255,.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.smart-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-light), var(--gold));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .4s ease;
}
.smart-card:hover::before { transform: scaleX(1); }
.smart-card:hover {
    background: rgba(255,255,255,.08);
    transform: translateY(-4px);
}
.smart-icon {
    width: 64px; height: 64px;
    margin: 0 auto 18px;
    background: rgba(200,169,110,.12);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem;
    color: var(--gold);
}
.smart-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 10px;
}
.smart-card p {
    font-size: .9rem;
    color: rgba(255,255,255,.65);
    line-height: 1.7;
}

/* ---------- 服务流程 ---------- */
.process { padding: 90px 0; background: var(--white); }
.process-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}
.process-step {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    flex: 1;
    min-width: 160px;
    max-width: 200px;
    position: relative;
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}
.process-step:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.process-step:hover h4,
.process-step:hover p { color: rgba(255,255,255,.85); }
.process-num {
    font-size: .8rem;
    font-weight: 700;
    color: var(--gold);
    letter-spacing: 1px;
    margin-bottom: 8px;
}
.process-icon {
    width: 52px; height: 52px;
    margin: 0 auto 14px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.3rem;
    color: var(--white);
}
.process-step h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 6px;
    transition: var(--transition);
}
.process-step p {
    font-size: .82rem;
    color: var(--gray-400);
    line-height: 1.5;
    transition: var(--transition);
}
.process-arrow {
    font-size: 1.4rem;
    color: var(--gold);
    flex-shrink: 0;
}

/* ---------- 新闻动态 ---------- */
.news { padding: 90px 0; background: var(--gray-50); }
.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}
.news-card {
    display: flex;
    gap: 20px;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}
.news-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.news-date {
    flex-shrink: 0;
    width: 68px;
    text-align: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-md);
    padding: 12px 8px;
    color: var(--white);
    display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.news-date .day { font-size: 1.6rem; font-weight: 800; line-height: 1; }
.news-date .month { font-size: .75rem; opacity: .85; margin-top: 4px; }
.news-content { flex: 1; }
.news-tag {
    display: inline-block;
    font-size: .72rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 12px;
    margin-bottom: 10px;
}
.tag-company { background: rgba(10,61,124,.08); color: var(--primary); }
.tag-industry { background: rgba(200,169,110,.12); color: var(--gold-dark); }
.tag-community { background: rgba(40,167,69,.08); color: #28a745; }
.tag-tips { background: rgba(220,53,69,.08); color: #dc3545; }
.news-content h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--gray-800);
    line-height: 1.5;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-content p {
    font-size: .88rem;
    color: var(--gray-400);
    line-height: 1.6;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-more {
    font-size: .82rem;
    color: var(--primary);
    font-weight: 600;
    display: inline-flex; align-items: center; gap: 4px;
}
.news-more:hover { color: var(--gold); gap: 8px; }

/* ---------- 招贤纳士 ---------- */
.join {
    padding: 90px 0;
    background: linear-gradient(135deg, #050d1f 0%, #0a2040 50%, #0a3d7c 100%);
    position: relative;
    overflow: hidden;
}
.join::before {
    content: "";
    position: absolute; inset: 0;
    background-image:
        radial-gradient(ellipse 500px 300px at 80% 20%, rgba(200,169,110,.08), transparent);
}
.join-content {
    position: relative; z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}
.join-content h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    color: var(--white);
    margin: 12px 0 16px;
}
.join-content > p {
    font-size: 1rem;
    color: rgba(255,255,255,.7);
    line-height: 1.9;
    margin-bottom: 40px;
}
.join-positions {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}
.position-card {
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: var(--radius-md);
    padding: 24px 16px;
    text-align: center;
    transition: var(--transition);
}
.position-card:hover {
    background: rgba(255,255,255,.1);
    transform: translateY(-3px);
    border-color: var(--gold);
}
.position-card i {
    font-size: 1.8rem;
    color: var(--gold);
    margin-bottom: 12px;
}
.position-card h4 {
    font-size: .95rem;
    color: var(--white);
    margin-bottom: 6px;
}
.position-card span {
    font-size: .8rem;
    color: rgba(255,255,255,.55);
}

/* ---------- 页脚 ---------- */
.footer {
    background: var(--gray-900);
    color: rgba(255,255,255,.6);
    padding: 70px 0 24px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}
.footer-logo {
    display: flex; align-items: center; gap: 10px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}
.footer-logo i {
    font-size: 1.6rem;
    color: var(--gold);
}
.footer-brand p {
    font-size: .88rem;
    line-height: 1.8;
    color: rgba(255,255,255,.45);
    margin-bottom: 20px;
}
.footer-social { display: flex; gap: 12px; }
.footer-social a {
    width: 38px; height: 38px;
    background: rgba(255,255,255,.06);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1rem;
    color: rgba(255,255,255,.5);
    transition: var(--transition);
}
.footer-social a:hover {
    background: var(--gold);
    color: var(--white);
    transform: translateY(-2px);
}
.footer-links h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 10px;
}
.footer-links h4::after {
    content: "";
    position: absolute;
    bottom: 0; left: 0;
    width: 30px; height: 2px;
    background: var(--gold);
    border-radius: 1px;
}
.footer-links a {
    display: block;
    font-size: .88rem;
    color: rgba(255,255,255,.45);
    padding: 6px 0;
    transition: var(--transition);
}
.footer-links a:hover {
    color: var(--gold);
    padding-left: 6px;
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.06);
    padding-top: 24px;
    text-align: center;
    font-size: .82rem;
    color: rgba(255,255,255,.3);
}

/* ---------- 回到顶部 ---------- */
.back-to-top {
    position: fixed;
    bottom: 32px; right: 32px;
    width: 46px; height: 46px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--white);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem;
    box-shadow: var(--shadow-md);
    opacity: 0; visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 999;
}
.back-to-top.show {
    opacity: 1; visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    transform: translateY(-3px);
}

/* ---------- 入场动画 ---------- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- 自定义滚动条 ---------- */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--gray-100); }
::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary), var(--gold));
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { filter: brightness(1.1); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .stats-row { grid-template-columns: repeat(2, 1fr); }
    .business-grid { grid-template-columns: repeat(2, 1fr); }
    .smart-grid { grid-template-columns: repeat(2, 1fr); }
    .news-grid { grid-template-columns: 1fr; }
    .join-positions { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 36px; }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .process-flow { gap: 4px; }
    .process-step { min-width: 140px; padding: 24px 16px; }
}

@media (max-width: 768px) {
    .top-bar { display: none; }
    .header .container { height: 64px; }
    .nav {
        position: fixed;
        top: 64px; left: 0; right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        max-height: calc(100vh - 64px);
        overflow-y: auto;
    }
    .nav.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    .nav > a, .nav-item-has-dropdown > a {
        width: 100%;
        padding: 14px 16px;
        font-size: 1rem;
    }
    .dropdown {
        position: static;
        opacity: 1; visibility: visible;
        transform: none;
        box-shadow: none;
        background: var(--gray-50);
        margin-top: 4px;
        padding: 4px 0;
    }
    .mobile-menu-toggle { display: flex; }
    .banner { min-height: 480px; }
    .banner h1 { font-size: 2rem; }
    .stats-row { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .stat-card { padding: 20px 12px; }
    .stat-number { font-size: 1.8rem; }
    .business-grid { grid-template-columns: 1fr; }
    .smart-grid { grid-template-columns: 1fr; }
    .process-flow { flex-direction: column; }
    .process-arrow { transform: rotate(90deg); }
    .process-step { max-width: 100%; width: 100%; }
    .join-positions { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .service-block { flex-direction: column; padding: 24px; gap: 16px; }
    .news-card { flex-direction: column; }
    .news-date { width: 100%; flex-direction: row; gap: 12px; padding: 10px 16px; }
}

@media (max-width: 480px) {
    .stats-row { grid-template-columns: repeat(2, 1fr); }
    .banner-actions { flex-direction: column; }
    .btn { width: 100%; justify-content: center; }
    .join-positions { grid-template-columns: 1fr; }
}