/* ========================
   立诚立成官网 - 基础与桌面端样式（高端质感）
   ======================== */

/* 变量 */
:root {
    --primary: #1a365d;
    --primary-dark: #0f2440;
    --primary-light: #eef3f9;
    --accent: #b8860b;
    --accent-light: #d4a843;
    --accent-blue: #3b6cb4;
    --gradient-primary: linear-gradient(135deg, #1a365d, #234b7a, #3266a0);
    --gradient-dark: linear-gradient(135deg, #0f1a2e, #162744, #1e3a5f);
    --sidebar-bg: #1a2740;
    --sidebar-hover: #223356;
    --text-dark: #1a202c;
    --text-gray: #4a5568;
    --text-light: #6b7a8d;
    --bg-gray: #f7f8fa;
    --bg-dark: #0f1a2e;
    --border: #e0e5ec;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
    --shadow-lg: 0 16px 40px rgba(0,0,0,0.08);
    --shadow-glow: 0 0 24px rgba(184, 134, 11, 0.15);
    --container: 1200px;
    --radius: 6px;
}

/* 重置 */
*, *::before, *::after { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
    font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 15px;
    line-height: 1.7;
    font-weight: 400;
    color: var(--text-dark);
    background: #fff;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

ul, ol, li { margin: 0; padding: 0; list-style: none; }
a { text-decoration: none; color: inherit; transition: color 0.3s; }
img { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 15px;
}

/* ========================
   科技感全局动效
   ======================== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes glowPulse {
    0%, 100% { box-shadow: 0 0 8px rgba(184, 134, 11, 0.15); }
    50%      { box-shadow: 0 0 20px rgba(184, 134, 11, 0.3); }
}

@keyframes gradientFlow {
    0%   { background-position: 0% 50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes borderGlow {
    0%, 100% { border-color: rgba(184, 134, 11, 0.08); }
    50%      { border-color: rgba(184, 134, 11, 0.25); }
}

@keyframes dotFloat {
    0%, 100% { transform: translateY(0) scale(1); }
    50%      { transform: translateY(-12px) scale(1.05); }
}

@keyframes scanLine {
    0%   { top: 0; }
    100% { top: 100%; }
}

/* ========================
   Header
   ======================== */
.site-header {
    background: #fff;
    border-bottom: 1px solid transparent;
    border-bottom-color: var(--border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100px;
    position: relative;
}

.logo { 
    display: flex; 
    align-items: center; 
    gap: 0;
}
.logo img { 
    height: 72px; 
    width: auto; 
    display: block;
    mix-blend-mode: multiply;
    image-rendering: auto;
}

.header-search {
    display: flex;
    align-items: center;
    width: 260px;
    border: 1px solid var(--border);
    border-radius: 24px;
    overflow: hidden;
    background: var(--bg-gray);
    transition: all 0.3s;
}

.header-search:focus-within {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 108, 180, 0.08);
}

.header-search input {
    flex: 1;
    border: none;
    padding: 8px 15px;
    outline: none;
    font-size: 13px;
    background: transparent;
}

.header-search button {
    width: 40px;
    height: 36px;
    color: var(--text-light);
    font-size: 14px;
    transition: all 0.3s;
}

.header-search button:hover {
    color: var(--primary);
    transform: scale(1.1);
}

.header-contact { 
    text-align: right; 
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.contact-label {
    font-size: 15px;
    color: var(--primary);
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 2px;
}

.contact-tel {
    font-size: 15px;
    font-weight: 400;
    color: var(--primary);
    letter-spacing: 1px;
    white-space: nowrap;
}

.contact-tel i {
    font-size: 11px;
    color: var(--accent);
    margin-right: 6px;
}

.mobile-menu-toggle {
    display: none;
    font-size: 22px;
    color: var(--primary);
    padding: 8px;
}

/* ========================
   主导航（科技渐变背景）
   ======================== */
.main-nav {
    background: var(--gradient-primary);
    background-size: 200% 200%;
    animation: gradientFlow 6s ease infinite;
    height: 48px;
    position: relative;
    z-index: 99;
}

.main-nav::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.9;
    box-shadow: 0 1px 6px rgba(184, 134, 11, 0.35);
}

.nav-inner { height: 100%; }

.nav-list {
    display: flex;
    align-items: center;
    height: 100%;
}

.nav-item {
    position: relative;
    height: 100%;
}

.nav-item > a {
    display: flex;
    align-items: center;
    height: 100%;
    padding: 0 45px;
    color: rgba(255,255,255,0.88);
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 2px;
    transition: all 0.3s;
    position: relative;
}

.nav-item > a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: #fff;
    transition: width 0.3s;
}

.nav-item > a i {
    font-size: 11px;
    margin-left: 6px;
    opacity: 0.7;
}

.nav-item:hover > a::after,
.nav-item.active > a::after {
    width: 50%;
}

.nav-item:hover > a,
.nav-item.active > a {
    background: rgba(255,255,255,0.08);
    color: #fff;
}

/* ========================
   Hero区域
   ======================== */
.hero-section {
    background: var(--bg-gray);
    padding: 0;
    position: relative;
}

.hero-inner {
    display: flex;
    height: 560px;
    padding: 0;
    max-width: var(--container);
    box-shadow: var(--shadow-md);
    border-radius: 0 0 var(--radius) var(--radius);
    overflow: visible;
}

/* 左侧服务分类（深色科技风） */
.service-sidebar {
    width: 230px;
    background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    color: #fff;
    flex-shrink: 0;
    position: relative;
    z-index: 100;
}

.sidebar-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 48px;
    padding: 0 18px;
    background: rgba(184, 134, 11, 0.08);
    font-size: 15px;
    font-weight: 400;
    letter-spacing: 2px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.service-categories { position: relative; }

.cat-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 52px;
    padding: 0 18px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.cat-item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 60%;
    background: linear-gradient(180deg, var(--accent-light), var(--accent));
    border-radius: 0 2px 2px 0;
    transition: width 0.3s;
}

.cat-item:hover::before {
    width: 3px;
}

.cat-item:hover {
    background: var(--sidebar-hover);
}

.cat-name { font-size: 14px; }
.cat-item > i { font-size: 12px; opacity: 0.5; transition: opacity 0.3s; }
.cat-item:hover > i { opacity: 1; color: var(--accent-light); }

/* Mega 面板 */
.mega-panel {
    position: absolute;
    top: 0;
    left: 230px;
    width: 720px;
    min-height: 100%;
    background: #fff;
    color: var(--text-dark);
    padding: 24px 28px;
    box-shadow: var(--shadow-lg);
    border-radius: 0 var(--radius) var(--radius) 0;
    display: none;
    flex-wrap: wrap;
    align-content: flex-start;
    gap: 0 30px;
    border: 1px solid var(--border);
    border-left: none;
}

.cat-item:hover .mega-panel { display: flex; }

.panel-group {
    width: 100%;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    border-image: linear-gradient(90deg, transparent, var(--border), transparent) 1;
}

.panel-group:last-child {
    border-bottom: none;
}

.panel-group h4 {
    display: inline-block;
    font-size: 14px;
    color: var(--text-dark);
    margin: 0 0 10px;
    font-weight: bold;
    position: relative;
}

.panel-group h4::after {
    content: "\f054";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    font-size: 10px;
    margin-left: 8px;
    color: var(--accent);
}

.panel-group h4 a:hover { color: var(--accent); }

.panel-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 20px;
    padding-left: 10px;
}

.panel-links a {
    font-size: 13px;
    color: var(--text-gray);
    position: relative;
    padding-left: 14px;
    transition: all 0.2s;
}

.panel-links a::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 4px;
    background: var(--accent);
    border-radius: 50%;
    transition: transform 0.2s;
}

.panel-links a:hover {
    color: var(--primary);
    transform: translateX(3px);
}

.panel-links a:hover::before {
    transform: translateY(-50%) scale(1.4);
}

/* Banner轮播 */
.hero-banner {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: #2a4d75;
    border-radius: 0 0 var(--radius) 0;
    box-shadow: inset 0 4px 8px rgba(0, 0, 0, 0.1);
}

.banner-slider {
    position: relative;
    width: 100%;
    height: 100%;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 0.8s ease;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #1f4266 0%, #2f5d87 40%, #4478a8 70%, #6a9ec9 100%);
    overflow: hidden;
}

/* 第一张轮播：深蓝金色科技光效 */
.banner-slide:nth-child(1)::before {
    content: "";
    position: absolute;
    top: -30%;
    right: -20%;
    width: 85%;
    height: 160%;
    background: radial-gradient(ellipse at center, rgba(240, 226, 191, 0.22) 0%, rgba(240, 226, 191, 0) 70%);
    transform: rotate(-20deg);
    pointer-events: none;
}

.banner-slide:nth-child(1)::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: repeating-linear-gradient(90deg,
        transparent 0,
        transparent 120px,
        rgba(255,255,255,0.03) 120px,
        rgba(255,255,255,0.03) 121px
    );
    pointer-events: none;
}

/* 第二张轮播：偏紫蓝商务光效 */
.banner-slide:nth-child(2) {
    background: linear-gradient(125deg, #22456d 0%, #325f8f 40%, #5289b8 100%);
}

.banner-slide:nth-child(2)::before {
    content: "";
    position: absolute;
    top: 20%;
    left: -10%;
    width: 60%;
    height: 120%;
    background: radial-gradient(ellipse at center, rgba(240, 226, 191, 0.12) 0%, rgba(240, 226, 191, 0) 70%);
    transform: rotate(25deg);
    pointer-events: none;
}

.banner-slide:nth-child(2)::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(30deg, rgba(255,255,255,0.02) 12%, transparent 12.5%, transparent 87%, rgba(255,255,255,0.02) 87.5%, rgba(255,255,255,0.02)),
        linear-gradient(150deg, rgba(255,255,255,0.02) 12%, transparent 12.5%, transparent 87%, rgba(255,255,255,0.02) 87.5%, rgba(255,255,255,0.02));
    background-size: 60px 104px;
    pointer-events: none;
}

.banner-slide.active { opacity: 1; z-index: 1; }

.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(15, 35, 60, 0.35) 0%, rgba(50, 100, 150, 0.08) 100%);
}

.banner-overlay::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 40%;
    background: linear-gradient(0deg, rgba(0,0,0,0.12) 0%, transparent 100%);
}

.banner-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
    padding: 0 60px;
    color: #fff;
    animation: fadeInUp 0.8s ease both;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.18);
}

.banner-slide.active .banner-content {
    animation: fadeInUp 0.8s ease both;
}

.banner-content h2 {
    font-size: 48px;
    margin: 0 0 18px;
    font-weight: 700;
    letter-spacing: 3px;
    background: linear-gradient(120deg, #ffffff 20%, #ecd9a8 55%, #ffffff 85%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

/* Banner 标签徽章 */
.banner-tag {
    display: inline-block;
    padding: 6px 18px;
    margin-bottom: 20px;
    font-size: 12px;
    letter-spacing: 3px;
    color: #f0e2bf;
    border: 1px solid rgba(240, 226, 191, 0.4);
    border-radius: 20px;
    background: rgba(184, 134, 11, 0.16);
    backdrop-filter: blur(4px);
}

.banner-content p {
    font-size: 18px;
    margin: 0 0 30px;
    font-weight: 300;
    opacity: 0.85;
}

.banner-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 32px;
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    color: #fff;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    transition: all 0.4s;
    box-shadow: 0 4px 16px rgba(184, 134, 11, 0.25);
}

.banner-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(184, 134, 11, 0.4);
}

.banner-btn::after {
    content: "\f061";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    font-size: 12px;
    transition: transform 0.3s;
}

.banner-btn:hover::after {
    transform: translateX(3px);
}

.banner-prev,
.banner-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    width: 48px;
    height: 64px;
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(10px);
    color: #fff;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    font-weight: 300;
}

.banner-prev:hover,
.banner-next:hover {
    background: rgba(184, 134, 11, 0.3);
    box-shadow: 0 0 24px rgba(184, 134, 11, 0.2);
}

.banner-prev { left: 0; border-radius: 0 8px 8px 0; }
.banner-next { right: 0; border-radius: 8px 0 0 8px; }

.banner-dots {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    gap: 10px;
}

.banner-dot {
    width: 10px;
    height: 10px;
    border-radius: 10px;
    background: rgba(255,255,255,0.35);
    cursor: pointer;
    transition: all 0.3s;
}

.banner-dot.active {
    width: 28px;
    background: var(--accent-light);
    box-shadow: 0 0 12px rgba(184, 134, 11, 0.3);
}

/* ========================
   通用板块
   ======================== */
.section {
    padding: 60px 0;
    background: #fff;
    position: relative;
    overflow: hidden;
}

/* 科技感几何网格背景 */
.section::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-image:
        radial-gradient(circle at 20% 80%, rgba(26, 54, 93, 0.02) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(184, 134, 11, 0.02) 0%, transparent 50%),
        linear-gradient(90deg, transparent 49.5%, var(--border) 49.5%, var(--border) 50.5%, transparent 50.5%);
    background-size: 100% 100%, 100% 100%, 40px 40px;
    opacity: 0.25;
    pointer-events: none;
    z-index: 0;
}

.section:nth-child(even) {
    background: var(--bg-gray);
}

.section-inner { position: relative; z-index: 1; }

.section-title {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 24px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
    position: relative;
}

.section-title::after {
    content: "";
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 42px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-light), var(--accent));
    border-radius: 1px;
}

.title-icon {
    color: var(--accent);
    font-size: 14px;
}

.section-title h2 {
    font-size: 22px;
    color: var(--text-dark);
    font-weight: 400;
    margin: 0;
    letter-spacing: 2px;
}

/* ========================
   板块标题差异化（打破模板感）
   ======================== */
.section-intro .section-title,
.section-process .section-title,
.section-cases .section-title {
    justify-content: center;
    text-align: center;
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 34px;
}

.section-intro .section-title::after,
.section-process .section-title::after,
.section-cases .section-title::after {
    display: none;
}

.section-intro .section-title h2,
.section-process .section-title h2,
.section-cases .section-title h2 {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: 4px;
    position: relative;
    padding-bottom: 16px;
}

.section-intro .section-title h2::after,
.section-process .section-title h2::after,
.section-cases .section-title h2::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 56px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-light), var(--accent));
    border-radius: 2px;
}

/* 服务覆盖标题：左侧大标题 */
.section-coverage .section-title h2 {
    font-size: 26px;
    font-weight: 600;
    letter-spacing: 3px;
}

/* ========================
   公司介绍 - 数字实力卡片
   ======================== */
.intro-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin: 30px 0;
}

.stat-card {
    text-align: center;
    padding: 26px 16px 22px;
    background: linear-gradient(160deg, #ffffff 0%, var(--primary-light) 100%);
    border: 1px solid var(--border);
    border-top: 3px solid var(--accent);
    border-radius: 10px;
    transition: all 0.35s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.stat-num {
    display: block;
    font-size: 38px;
    font-weight: 700;
    line-height: 1.1;
    color: var(--primary);
    margin-bottom: 8px;
}

.stat-plus {
    color: var(--accent);
    font-size: 22px;
    vertical-align: super;
}

.stat-label {
    font-size: 13px;
    color: var(--text-gray);
    letter-spacing: 2px;
}

/* 公司介绍 */
.section-intro { background: #fff; }

.intro-content {
    color: var(--text-gray);
    font-size: 14px;
    line-height: 2;
}

.intro-content p {
    margin: 0 0 15px;
    text-indent: 2em;
}

.intro-values {
    margin-top: 20px;
    padding: 18px 20px;
    background: rgba(26, 54, 93, 0.02);
    border-radius: var(--radius);
    border: 1px solid rgba(26, 54, 93, 0.06);
}

.value-item {
    margin-bottom: 10px;
    color: var(--text-gray);
    padding-left: 20px;
    position: relative;
}

.value-item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 1px;
    transform: rotate(45deg);
}

.value-item strong { color: var(--text-dark); }

/* 服务覆盖 */
.section-coverage {
    background: var(--bg-gray);
}

.coverage-content {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

.coverage-img {
    flex: 0 0 520px;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: var(--bg-gray);
}

.coverage-img img {
    width: 100%;
    transition: transform 0.6s;
}

.coverage-img:hover img {
    transform: scale(1.03);
}

.coverage-info {
    flex: 1;
    color: var(--text-gray);
    line-height: 1.9;
}

.coverage-info h3 {
    font-size: 26px;
    color: var(--text-dark);
    margin: 0 0 18px;
    font-weight: 300;
    letter-spacing: 2px;
    position: relative;
    padding-bottom: 14px;
}

.coverage-info h3::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-light), var(--accent));
    border-radius: 1px;
}

.coverage-info p { margin: 0 0 8px; }

.coverage-head { color: var(--text-gray); font-size: 15px; }

.coverage-cities {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 20px 0;
}

.city {
    width: 76px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    font-weight: 400;
    color: var(--primary);
    border: 1px solid rgba(26, 54, 93, 0.12);
    background: rgba(26, 54, 93, 0.03);
    border-radius: var(--radius);
    transition: all 0.3s;
    cursor: default;
    letter-spacing: 1px;
}

.city:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(26, 54, 93, 0.08);
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(184, 134, 11, 0.04);
}

.coverage-hotline {
    margin-top: 20px;
    font-size: 16px;
    color: var(--primary);
    padding: 14px 20px;
    background: rgba(26, 54, 93, 0.03);
    border-radius: var(--radius);
    border-left: 2px solid var(--accent);
    font-weight: 300;
    letter-spacing: 0.5px;
}

/* 服务流程 */
.section-process { background: #fff; }

.process-flow {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.process-subtitle {
    text-align: center;
    font-size: 22px;
    font-weight: 300;
    color: var(--text-dark);
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.process-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
}

.process-step {
    display: flex;
    align-items: center;
    gap: 0;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: 40px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    min-width: 135px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.process-step:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.step-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 44px;
    flex-shrink: 0;
    font-size: 16px;
    font-weight: 700;
    background: rgba(255,255,255,0.12);
    border-right: 1px solid rgba(255,255,255,0.15);
}

.step-text {
    flex: 1;
    text-align: center;
    padding: 0 16px;
    font-size: 15px;
    font-weight: 400;
    letter-spacing: 1px;
    white-space: nowrap;
}

.step-arrow {
    color: var(--accent);
    font-size: 12px;
    opacity: 0.8;
}

/* 典型案例 */
.section-cases { background: var(--bg-gray); }

.cases-note {
    text-align: center;
    font-size: 13px;
    color: var(--text-gray);
    letter-spacing: 3px;
    margin: 0 0 18px;
}

.cases-note::before,
.cases-note::after {
    content: "—";
    color: var(--accent);
    margin: 0 12px;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.case-item {
    aspect-ratio: 3 / 1;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 12px;
    background: #fff;
    border-radius: var(--radius);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.case-item::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(184, 134, 11, 0.04), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.case-item:hover {
    border-color: var(--accent);
    color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

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

.case-item img {
    max-width: 75%;
    max-height: 55%;
    object-fit: contain;
    display: block;
}

/* 案例6 LOGO放大 */
.case-item:nth-child(6) img {
    max-width: 96%;
    max-height: 82%;
}




/* ========================
   Footer（深色科技风）
   ======================== */
.site-footer {
    background: linear-gradient(180deg, #141e2e 0%, #0f1a2e 100%);
    border-top: 2px solid rgba(184, 134, 11, 0.35);
    padding: 44px 0 22px;
    position: relative;
}

.site-footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent 0%, var(--accent) 50%, transparent 100%);
    opacity: 0.5;
}

/* Footer 三栏布局 */
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
    gap: 40px;
    padding: 6px 0 32px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.footer-col h4 {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 2px;
    margin: 0 0 16px;
    padding-bottom: 10px;
    position: relative;
}

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

.footer-col p {
    color: rgba(255, 255, 255, 0.78);
    font-size: 13px;
    line-height: 1.9;
    margin: 0 0 6px;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li { margin-bottom: 8px; }

.footer-links a {
    color: rgba(255, 255, 255, 0.72);
    font-size: 13px;
    text-decoration: none;
    transition: color 0.3s, padding-left 0.3s;
}

.footer-links a:hover {
    color: #fff;
    padding-left: 6px;
}

.footer-contact p i { margin-right: 8px; color: var(--accent); width: 14px; }

.footer-tel {
    color: #f0e2bf !important;
    font-size: 15px !important;
    font-weight: 600;
}

.footer-mail,
.footer-addr { color: rgba(255, 255, 255, 0.72) !important; }

.site-footer::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(184, 134, 11, 0.02) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(26, 54, 93, 0.02) 0%, transparent 50%);
    pointer-events: none;
}

.footer-content {
    text-align: center;
    color: rgba(255, 255, 255, 0.65);
    font-size: 13px;
    line-height: 2;
}

.footer-content p { margin: 0; }

.footer-content a {
    color: rgba(255, 255, 255, 0.6);
    transition: color 0.3s;
}

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

/* ========================
   子页面通用样式
   ======================== */
.page-main {
    min-height: 400px;
    background: var(--bg-gray);
}

.page-section {
    background: #fff;
    padding: 40px 0 60px;
}

.page-content {
    color: var(--text-gray);
    font-size: 14px;
    line-height: 1.9;
}

.page-content p { margin: 0 0 15px; }

/* 服务卡片 */
.service-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
    margin-top: 25px;
}

.service-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px;
    background: #fff;
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(180deg, var(--accent-light), var(--accent));
    transform: scaleY(0);
    transition: transform 0.4s;
    transform-origin: top;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

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

.service-card h3 {
    font-size: 17px;
    color: var(--text-dark);
    margin: 0 0 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 400;
    letter-spacing: 0.5px;
}

.service-card h3 i {
    font-size: 20px;
    color: var(--accent);
    background: rgba(184, 134, 11, 0.06);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
}

.service-card p {
    margin: 0;
    color: var(--text-light);
    font-size: 13px;
    line-height: 1.8;
}

/* 新闻列表 */
.news-list { margin-top: 20px; }

.news-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 15px 0;
    border-bottom: 1px solid var(--border);
    transition: all 0.3s;
}

.news-item:hover {
    background: linear-gradient(90deg, rgba(184, 134, 11, 0.02), transparent);
    padding-left: 10px;
}

.news-date {
    color: var(--text-light);
    font-size: 13px;
    flex-shrink: 0;
    width: 90px;
}

.news-title-link {
    color: var(--text-gray);
    font-size: 14px;
    transition: all 0.3s;
}

.news-title-link:hover {
    color: var(--accent);
    transform: translateX(4px);
}

/* 商务合作 */
.cooperation-info {
    margin-top: 20px;
    padding: 24px;
    background: rgba(26, 54, 93, 0.02);
    border-radius: var(--radius);
    border: 1px solid rgba(26, 54, 93, 0.08);
}

.cooperation-info p {
    margin: 0 0 12px;
    color: var(--primary);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.cooperation-info p:last-child { margin-bottom: 0; }

.cooperation-info i {
    color: var(--accent);
    width: 20px;
    text-align: center;
}

/* 留言表单 */
.message-form { max-width: 600px; margin-top: 25px; }

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

.form-row label {
    display: block;
    margin-bottom: 6px;
    color: var(--text-dark);
    font-size: 14px;
    font-weight: 600;
}

.form-row input,
.form-row textarea {
    width: 100%;
    padding: 11px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    outline: none;
    transition: all 0.3s;
    background: var(--bg-gray);
}

.form-row input:focus,
.form-row textarea:focus {
    border-color: var(--accent-light);
    box-shadow: 0 0 0 3px rgba(184, 134, 11, 0.06);
    background: #fff;
}

.form-row textarea { resize: vertical; }

.submit-btn {
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    color: #fff;
    padding: 12px 40px;
    border-radius: 30px;
    font-size: 15px;
    font-weight: 400;
    letter-spacing: 2px;
    transition: all 0.4s;
    box-shadow: 0 4px 16px rgba(184, 134, 11, 0.2);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(184, 134, 11, 0.35);
    background: linear-gradient(135deg, var(--accent-light), var(--accent));
}

/* 移动端遮罩 */
.mobile-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    z-index: 199;
}