/* ==========================================================================
   北京星纬互联科技有限公司 - 官网样式表
   Design System: Inspired by CHAGEE (霸王茶姬) 现代高奢明亮美学与极简排版
   Brand Color Palette:
     - 纯净透亮底色: #FFFFFF / #F7FAF8 (全站彻底告别暗黑沉闷)
     - Logo 主品牌绿: #31BA98 / #28A787 (源自官方LOGO核心极光青翠绿)
     - 墨韵深字色: #1C2B27 (兼具高可读性与东方雅致)
     - 次要正文字色: #4A5D57
     - 辅助浅灰边框: #E3EBE7
   ========================================================================== */

:root {
    --color-main: #1F2937;
    --color-main-light: #374151;
    --color-main-dark: #111827;
    --color-accent: #31BA98;
    --color-accent-hover: #269E80;
    --color-accent-glow: #31BA98;
    --color-gold: #C5A880;
    --color-bg-light: #F9FAFB;
    --color-bg-white: #FFFFFF;
    --color-bg-dark: #F3F4F6;
    --color-border: #E5E7EB;
    --color-text-main: #111827;
    --color-text-body: #4B5563;
    --color-text-muted: #9CA3AF;
    --color-text-light: #FFFFFF;

    --font-serif: "Songti SC", "SimSun", "Noto Serif SC", "STSong", serif;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;

    --header-height: 84px;
    --transition-smooth: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --border-radius-card: 16px;
    --border-radius-btn: 9999px;
    --box-shadow-subtle: 0 4px 24px rgba(49, 186, 152, 0.08);
    --box-shadow-hover: 0 16px 40px rgba(49, 186, 152, 0.16);
}

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

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

body {
    font-family: var(--font-sans);
    color: var(--color-text-body);
    background-color: var(--color-bg-white);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul, ol {
    list-style: none;
}

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

button {
    cursor: pointer;
    border: none;
    outline: none;
    background: transparent;
    font-family: inherit;
    transition: var(--transition-smooth);
}

/* 通用容器 */
.section-container {
    width: 100%;
    max-width: 1360px;
    margin: 0 auto;
    padding: 0 2rem;
}

.bg-light {
    background-color: var(--color-bg-light);
}

.bg-white {
    background-color: var(--color-bg-white);
}

.bg-dark {
    background-color: var(--color-bg-dark);
}

.text-white {
    color: #FFFFFF !important;
}

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

/* ==========================================================================
   Header (Chagee 极简透明通栏 - 融入首屏视差背景)
   ========================================================================== */
.chagee-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: 1000;
    transition: var(--transition-smooth);
    background: transparent;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.chagee-header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    height: 72px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border-bottom: 1px solid var(--color-border);
}

.header-container {
    max-width: 1520px;
    height: 100%;
    margin: 0 auto;
    padding: 0 2.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* 左上角品牌 LOGO */
.brand-logo-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 1001;
}

.brand-logo {
    width: 28px;
    height: 28px;
    object-fit: contain;
    filter: none;
    transition: transform 0.3s ease;
}

.brand-logo-wrap:hover .brand-logo {
    transform: scale(1.05) rotate(3deg);
}

.brand-name-box {
    display: flex;
    flex-direction: column;
}

.brand-cn {
    font-size: 0.98rem;
    font-weight: 700;
    color: #FFFFFF;
    letter-spacing: 2px;
    font-family: var(--font-sans);
    transition: color 0.3s ease;
}

.brand-en {
    font-size: 0.65rem;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 1.5px;
    font-weight: 600;
    text-transform: uppercase;
    transition: color 0.3s ease;
}

.chagee-header.scrolled .brand-cn {
    color: var(--color-main);
}

.chagee-header.scrolled .brand-en {
    color: var(--color-text-muted);
}

/* 主导航菜单 - 默认白字，滚动后自适应 */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 3.2rem;
    height: 100%;
    margin-left: auto;
    margin-right: 2rem;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: #FFFFFF;
    letter-spacing: 1px;
    padding: 0.5rem 0;
    position: relative;
    display: inline-block;
    transition: var(--transition-smooth);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 20px;
    height: 2px;
    background: var(--color-accent);
    transition: transform 0.3s ease;
}

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

.nav-link:hover::after {
    transform: translateX(-50%) scaleX(1);
}

.chagee-header.scrolled .nav-link {
    color: var(--color-text-body);
}

.chagee-header.scrolled .nav-link:hover {
    color: var(--color-accent);
}

/* 导航右侧语言切换与汉堡按钮 */
.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 26px;
    height: 18px;
}

.toggle-bar {
    width: 100%;
    height: 2px;
    background-color: #FFFFFF;
    border-radius: 2px;
    transition: var(--transition-smooth);
}

.chagee-header.scrolled .toggle-bar {
    background-color: var(--color-main);
}

/* 移动端抽屉 */
.mobile-drawer {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
    padding: 1.5rem 2rem;
    transform: translateY(-100%);
    opacity: 0;
    transition: var(--transition-smooth);
    z-index: 999;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.mobile-drawer.open {
    transform: translateY(0);
    opacity: 1;
}

.mobile-nav-list {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.mobile-nav-link {
    font-size: 1.1rem;
    color: var(--color-main);
    font-weight: 500;
}

/* ==========================================================================
   Hero Section (全屏视差轮播 - Chagee 大片气场)
   ========================================================================== */
.hero-section {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 680px;
    overflow: hidden;
    background-color: var(--color-main);
}

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

.hero-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 1.2s ease, visibility 1.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-slide.active {
    opacity: 1;
    visibility: visible;
}

.slide-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.04);
    transition: transform 7s ease;
}

.hero-slide.active .slide-bg {
    transform: scale(1);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(29, 59, 52, 0.05) 0%, rgba(29, 59, 52, 0.18) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 960px;
    text-align: center;
    padding: 0 2rem;
    color: #FFFFFF;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 0.85rem;
    letter-spacing: 4px;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    margin-bottom: 1.2rem;
    animation: fadeInDown 1s ease forwards;
}

.hero-title {
    font-size: 3.8rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: 3px;
    margin-bottom: 1.5rem;
    font-family: var(--font-serif);
    text-shadow: none;
    animation: fadeInUp 1s ease forwards 0.2s;
}

.hero-title .title-dot {
    display: inline-block;
    margin: 0 0.22em;
    font-size: 0.9em;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    vertical-align: middle;
    line-height: 1;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 300;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
    max-width: 720px;
    margin: 0 auto 2.5rem;
    letter-spacing: 1px;
    animation: fadeInUp 1s ease forwards 0.4s;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    animation: fadeInUp 1s ease forwards 0.6s;
}

/* 按钮规范 (Chagee 经典圆弧大按钮) */
.chagee-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 2.4rem;
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 1px;
    border-radius: var(--border-radius-btn);
    transition: var(--transition-smooth);
}

.btn-primary {
    background-color: var(--color-accent);
    color: #061916;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(49, 186, 152, 0.4);
}

.btn-primary:hover {
    background-color: #FFFFFF;
    color: var(--color-main);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.5);
}

.btn-outline {
    background: transparent;
    color: #FFFFFF;
    border: 1px solid rgba(255, 255, 255, 0.6);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: #FFFFFF;
    transform: translateY(-2px);
}

/* 轮播控制器 */
.hero-controls {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    z-index: 10;
}

.slider-arrow {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    cursor: pointer;
    background: transparent;
    transition: var(--transition-smooth);
}

.slider-arrow .arrow-svg {
    width: 20px;
    height: 20px;
    fill: #FFFFFF;
    display: block;
    transition: var(--transition-smooth);
}

.slider-arrow:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: #FFFFFF;
}

.slider-dots {
    display: flex;
    align-items: center;
    gap: 10px;
}

.slider-dots .dot {
    width: 28px;
    height: 3px;
    background: rgba(255, 255, 255, 0.35);
    border-radius: 2px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.slider-dots .dot.active {
    background: var(--color-accent);
    width: 42px;
}

/* 视差滚动引导 */
.scroll-down-hint {
    position: absolute;
    right: 40px;
    bottom: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.7rem;
    letter-spacing: 2px;
    z-index: 10;
    transition: var(--transition-smooth);
}

.scroll-down-hint:hover {
    color: var(--color-accent);
}

.mouse-icon {
    width: 20px;
    height: 32px;
    border: 2px solid rgba(255, 255, 255, 0.6);
    border-radius: 12px;
    position: relative;
}

.mouse-icon::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 6px;
    background: #FFFFFF;
    border-radius: 2px;
    animation: scrollWheel 2s infinite;
}

/* ==========================================================================
   Section 通用排版规范 (Chagee 极简诗意标题结构)
   ========================================================================== */
.chagee-section {
    padding: 7rem 0;
    position: relative;
}

.section-header-center {
    max-width: 800px;
    margin: 0 auto 4.5rem;
    text-align: center;
}

.section-eyebrow {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 3px;
    color: var(--color-main);
    text-transform: uppercase;
    margin-bottom: 0.8rem;
}

.text-accent {
    color: var(--color-accent) !important;
}

.chagee-h2 {
    font-size: 3.2rem;
    font-weight: 700;
    color: var(--color-main);
    font-family: var(--font-serif);
    letter-spacing: 2px;
    margin-bottom: 2rem;
}

.title-subline {
    width: 48px;
    height: 3px;
    background: var(--color-main);
    margin: 0 auto 1.5rem;
    border-radius: 2px;
}

.bg-dark .title-subline {
    background: var(--color-accent);
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--color-text-body);
    line-height: 1.8;
}

/* 诗意金句导语排版 (三行居中或左对齐，霸王茶姬标志性文风) */
.chagee-lead-text {
    margin-bottom: 1.8rem;
    font-family: var(--font-serif);
}

.chagee-lead-text p {
    font-size: 1.35rem;
    color: var(--color-main);
    font-weight: 600;
    line-height: 2;
    letter-spacing: 1.5px;
}

.chagee-lead-text.text-light p {
    color: #FFFFFF;
}

.chagee-body-desc {
    color: var(--color-text-body);
    font-size: 0.98rem;
    line-height: 1.9;
    margin-bottom: 2.5rem;
}

.chagee-body-desc p {
    margin-bottom: 1rem;
}

/* ==========================================================================
   Section 1: 关于我们 (100% 严谨复刻 CHAGEE 截图原版通栏 1:1 分割排版)
   ========================================================================== */
.about-chagee-exact {
    width: 100%;
    height: 100vh;
    min-height: 640px;
    max-height: 960px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    background-color: #FFFFFF;
    overflow: hidden;
}

.exact-visual-half {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.exact-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.exact-text-half {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 5rem;
    background: #FFFFFF;
}

.exact-text-inner {
    max-width: 520px;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    text-align: right;
}

.exact-title {
    font-size: 3.2rem;
    font-weight: 600;
    font-family: var(--font-serif);
    color: var(--color-main);
    letter-spacing: 2px;
    margin-bottom: 3.4rem;
    text-align: right;
    width: 100%;
}

.exact-lines {
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
    margin-bottom: 3rem;
    align-items: flex-end;
    width: 100%;
}

.exact-lines p {
    font-size: 1.05rem;
    color: #4B5563;
    letter-spacing: 1.5px;
    font-family: "PingFang SC", "Microsoft YaHei", "SimHei", sans-serif;
    line-height: 1.8;
    text-align: right;
}

.exact-more-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 2.4rem;
    border: 1px solid #D5DDD8;
    border-radius: 9999px;
    font-size: 0.88rem;
    color: #6C7D77;
    background: #FFFFFF;
    letter-spacing: 1px;
    transition: var(--transition-smooth);
}

.exact-more-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: var(--color-bg-light);
    transform: translateY(-2px);
}

/* 核心支柱特征卡片 (01, 02, 03) */
.about-feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    border-top: 1px solid var(--color-border);
    padding-top: 2rem;
}

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

.feature-icon {
    font-size: 1.25rem;
    font-weight: 700;
    font-family: var(--font-serif);
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.feature-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-main);
    margin-bottom: 0.4rem;
}

.feature-desc {
    font-size: 0.82rem;
    color: var(--color-text-body);
    line-height: 1.6;
}

/* ==========================================================================
   Section 2: 业务全景 (浅灰底色与全景矩阵)
   ========================================================================== */
.scope-fullscreen-section {
    position: relative;
    width: 100%;
    height: 800px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 0 2rem;
    background-color: #f6f6f6;
}

.scope-content-wrap {
    position: relative;
    z-index: 2;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    text-align: center;
}

.scope-header {
    margin-bottom: 4rem;
}

.text-white {
    color: #FFFFFF !important;
}

.scope-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-top: 1rem;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.scope-pills-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.scope-pill-item {
    background: #FFFFFF;
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 16px;
    padding: 2.2rem 1.6rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.scope-pill-item:hover {
    background: #FFFFFF;
    border-color: rgba(49, 186, 152, 0.4);
    transform: translateY(-6px);
    box-shadow: 0 16px 36px rgba(11, 43, 38, 0.08);
}

.pill-num {
    font-size: 1.8rem;
    font-weight: 700;
    font-family: var(--font-serif);
    color: var(--color-accent);
    margin-bottom: 0.6rem;
    letter-spacing: 1px;
}

.pill-name {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-text-main);
    margin-bottom: 0.8rem;
    letter-spacing: 0.5px;
}

.pill-tag {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

@media (max-width: 992px) {
    .scope-pills-row {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .scope-pills-row {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Section 3: 关于产品 (完全复刻 Chagee 横向滑动卡片矩阵)
   ========================================================================== */
.product-section {
    overflow: hidden;
}

.product-header-container {
    width: 100%;
    max-width: none;
    margin: 0;
    padding-left: max(2.5rem, calc((100vw - 1520px) / 2 + 2.5rem));
    padding-right: 0;
    display: flex;
    gap: 4rem;
}

.product-intro-left {
    width: 320px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.product-lead-text {
    margin-top: 0.25rem;
    margin-bottom: 1.5rem;
}

.product-lead-text .highlight-p {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-main);
    font-family: var(--font-serif);
    line-height: 1.6;
}

.product-lead-text .sub-p {
    font-size: 0.95rem;
    font-family: var(--font-sans);
    color: var(--color-text-body);
    margin-top: 0.5rem;
    line-height: 1.6;
}

.product-cards-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
}

.product-nav-arrows-center {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 2rem;
    width: 100%;
}

.prod-slider-dots {
    display: flex;
    align-items: center;
    gap: 12px;
}

.prod-slider-dots .prod-dot {
    width: 48px;
    height: 3px;
    background: rgba(31, 41, 55, 0.2);
    border-radius: 2px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.prod-slider-dots .prod-dot.active {
    background: var(--color-accent);
    width: 72px;
}

.prod-arrow {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid #D1D5DB;
    color: #9CA3AF;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    cursor: pointer;
    background: transparent;
    transition: var(--transition-smooth);
}

.prod-arrow .arrow-svg {
    width: 18px;
    height: 18px;
    fill: #9CA3AF;
    display: block;
    transition: var(--transition-smooth);
}

.prod-arrow:hover {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: #FFFFFF;
}

.prod-arrow:hover .arrow-svg {
    fill: #FFFFFF;
}

/* 横向平滑轮播容器 (Chagee 3:4 比例卡片) */
.product-cards-carousel {
    flex: 1;
    display: flex;
    gap: 1.8rem;
    overflow-x: auto;
    scroll-behavior: smooth;
    padding: 1.5rem 0 1.5rem 0.5rem;
    scrollbar-width: none; /* Firefox */
}

.product-cards-carousel::-webkit-scrollbar {
    display: none; /* Chrome/Safari */
}

.home-product-card {
    position: relative;
    width: 430px;
    height: 520px;
    flex-shrink: 0;
    border-radius: var(--border-radius-card);
    overflow: hidden;
    box-shadow: var(--box-shadow-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.home-product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.25);
}

.card-image-box {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s ease;
}

.home-product-card:hover .card-img {
    transform: scale(1.08);
}

/* 优雅暗色渐变遮罩，调低不透明度，背景图更加通透清晰 */
.card-image-box::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10, 20, 26, 0.22) 0%, rgba(10, 20, 26, 0.42) 100%);
    transition: var(--transition-smooth);
}

.home-product-card:hover .card-image-box::after {
    background: linear-gradient(180deg, rgba(10, 20, 26, 0.28) 0%, rgba(10, 20, 26, 0.52) 100%);
}

.card-info {
    position: relative;
    z-index: 2;
    padding: 2.2rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    width: 100%;
    height: 100%;
    transform: translateY(-120px);
}

.card-title {
    font-size: 1.7rem;
    font-weight: 600;
    color: #FFFFFF;
    margin-bottom: 0.8rem;
    letter-spacing: 1.5px;
    font-family: var(--font-serif);
    text-align: center;
}

/* 中英文之间的白色短横线 */
.card-divider-line {
    width: 24px;
    height: 2px;
    background-color: #FFFFFF;
    margin: 0 auto 0.9rem;
    border-radius: 2px;
    opacity: 0.85;
}

.card-desc {
    font-size: 0.9rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 0.5px;
    line-height: 1.6;
    margin: 0 auto;
    max-width: 250px;
    text-align: center;
    font-family: var(--font-sans);
}

.card-footer-line {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.card-metric {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-main);
}

.card-arrow-link {
    font-size: 1.1rem;
    color: var(--color-accent);
    font-weight: 600;
    transition: transform 0.3s ease;
}

.home-product-card:hover .card-arrow-link {
    transform: translateX(4px);
}

/* ==========================================================================
   Section 4: 全球布局 (Chagee 全球网络深色质感)
   ========================================================================== */
.global-banner-inner {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 4rem;
    align-items: center;
}

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

.global-description {
    font-size: 1rem;
    color: var(--color-text-body);
    line-height: 1.9;
    margin-bottom: 3rem;
}

.global-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    border-top: 1px solid var(--color-border);
    padding-top: 2rem;
}

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

.stat-num {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-accent);
    font-family: var(--font-serif);
    line-height: 1.2;
    margin-bottom: 0.4rem;
}

.stat-label {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* 网络互动地图画框 (明亮版) */
.network-map-box {
    position: relative;
    border-radius: var(--border-radius-card);
    overflow: hidden;
    border: 1px solid var(--color-border);
    box-shadow: 0 16px 40px rgba(49, 186, 152, 0.12);
    background: #FFFFFF;
}

.map-bg-img {
    width: 100%;
    display: block;
}

/* 动态发光节点脉冲 */
.pulse-node {
    position: absolute;
    width: 16px;
    height: 16px;
    transform: translate(-50%, -50%);
    cursor: pointer;
}

.pulse-dot {
    position: absolute;
    inset: 4px;
    background: var(--color-accent-glow);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--color-accent-glow);
}

.pulse-ring {
    position: absolute;
    inset: -6px;
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    animation: pulseGlow 2.4s infinite;
}

.node-tag {
    position: absolute;
    top: 22px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(11, 43, 38, 0.92);
    border: 1px solid var(--color-accent);
    color: #FFFFFF;
    font-size: 0.72rem;
    padding: 3px 8px;
    border-radius: 10px;
    white-space: nowrap;
    opacity: 0.9;
    pointer-events: none;
    transition: var(--transition-smooth);
}

.pulse-node:hover .node-tag {
    opacity: 1;
    transform: translateX(-50%) translateY(-2px);
    background: var(--color-accent);
    color: var(--color-main);
    font-weight: 600;
}

/* 节点在地图中的绝对百分比坐标 */
.node-beijing { top: 42%; left: 72%; }
.node-na { top: 38%; left: 24%; }
.node-eu { top: 36%; left: 47%; }
.node-sg { top: 58%; left: 69%; }

/* ==========================================================================
   Section 5: 科技影响力 (Chagee 极简纯净卡片设计)
   ========================================================================== */
.impact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.8rem;
}

.impact-card {
    background: #FFFFFF;
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: var(--border-radius-card);
    padding: 2.4rem 2rem 2.2rem;
    position: relative;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
}

.impact-card:hover {
    transform: translateY(-6px);
    border-color: rgba(49, 186, 152, 0.4);
    box-shadow: 0 16px 36px rgba(11, 43, 38, 0.08);
}

.impact-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.impact-card-num {
    font-size: 1.6rem;
    font-weight: 700;
    font-family: var(--font-serif);
    color: var(--color-accent);
    letter-spacing: 1px;
    line-height: 1;
}

.impact-card-tag {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--color-text-muted);
    letter-spacing: 1px;
    background: var(--color-bg-light);
    padding: 2px 8px;
    border-radius: 4px;
}

.impact-card-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-main);
    margin-bottom: 0.9rem;
    letter-spacing: 0.5px;
}

.impact-card-text {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: 1.4rem;
    flex: 1;
}

.impact-card-quote {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--color-accent);
    letter-spacing: 0.5px;
}
}

/* ==========================================================================
   Section 6: 全周期技术服务体系 (贴合营业执照服务矩阵)
   ========================================================================== */
.services-pipeline-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.service-pipeline-card {
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-card);
    padding: 2.2rem 1.8rem;
    display: flex;
    flex-direction: column;
    box-shadow: var(--box-shadow-subtle);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.service-pipeline-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: transparent;
    transition: background 0.3s ease;
}

.service-pipeline-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--box-shadow-hover);
    border-color: rgba(1, 30, 65, 0.15);
}

.service-pipeline-card:hover::before {
    background: var(--color-accent);
}

.service-step-badge {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 1.2rem;
    margin-bottom: 1.5rem;
}

.step-num {
    font-size: 2.2rem;
    font-weight: 700;
    font-family: var(--font-serif);
    color: var(--color-main);
    line-height: 1;
}

.step-tag {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--color-text-muted);
}

.service-card-body {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.service-icon-box {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(49, 186, 152, 0.12);
    color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.2rem;
    transition: all 0.3s ease;
}

.service-pipeline-card:hover .service-icon-box {
    background: var(--color-accent);
    color: #FFFFFF;
    transform: scale(1.05);
}

.service-card-title {
    font-size: 1.18rem;
    font-weight: 700;
    color: var(--color-main);
    margin-bottom: 0.8rem;
    line-height: 1.4;
}

.service-card-desc {
    font-size: 0.86rem;
    color: var(--color-text-body);
    line-height: 1.75;
    margin-bottom: 1.5rem;
    flex: 1;
}

.service-points {
    border-top: 1px dashed var(--color-border);
    padding-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.service-points li {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    position: relative;
    padding-left: 14px;
    line-height: 1.5;
}

.service-points li::before {
    content: '•';
    color: var(--color-accent);
    position: absolute;
    left: 2px;
    top: -1px;
    font-size: 1rem;
}

/* ==========================================================================
   Footer (Chagee 明朗高奢浅雅风格，严格无电话与地址)
   ========================================================================== */
.chagee-footer {
    background-color: var(--color-bg-light);
    color: var(--color-text-body);
    padding: 5.5rem 0 2.5rem;
    border-top: 1px solid var(--color-border);
}

.footer-container {
    width: 100%;
    max-width: none;
    margin: 0;
    padding-left: max(2.5rem, calc((100vw - 1520px) / 2 + 2.5rem));
    padding-right: max(2.5rem, calc((100vw - 1520px) / 2 + 2.5rem));
}

.footer-top-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 4rem;
    border-bottom: 1px solid var(--color-border);
}

.footer-brand-col {
    width: 50%;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}

.footer-nav-groups {
    width: 50%;
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 4.5rem;
    padding-left: calc((50vw - 520px) / 2);
}

@media (max-width: 1200px) {
    .footer-nav-groups {
        padding-left: 2rem;
        gap: 3rem;
    }
}

@media (max-width: 992px) {
    .footer-top-row {
        flex-direction: column;
        gap: 3rem;
    }
    .footer-brand-col,
    .footer-nav-groups {
        width: 100%;
        padding-left: 0;
    }
}

.footer-brand-col {
    display: flex;
    flex-direction: column;
}

.footer-logo-box {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 1.5rem;
}

.footer-logo {
    width: 44px;
    height: 44px;
    object-fit: contain;
}

.footer-brand-title {
    display: flex;
    flex-direction: column;
}

.f-name-cn {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: var(--color-main);
}

.f-name-en {
    font-size: 0.65rem;
    color: var(--color-text-muted);
    letter-spacing: 0.5px;
    font-weight: 600;
}

.footer-mission {
    font-size: 0.88rem;
    color: var(--color-text-body);
    line-height: 1.8;
    max-width: 360px;
}

.f-links-heading {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-main);
    letter-spacing: 1px;
    margin-bottom: 1.4rem;
}

.f-links-list li {
    margin-bottom: 0.75rem;
}

.f-links-list a {
    font-size: 0.84rem;
    color: var(--color-text-muted);
    transition: var(--transition-smooth);
}

.f-links-list a:hover {
    color: var(--color-accent);
    padding-left: 4px;
}

.footer-bottom-row {
    padding-top: 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.82rem;
    color: var(--color-text-muted);
}

.footer-legal-links {
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.footer-legal-links .sep {
    color: var(--color-border);
}

/* ==========================================================================
   返回顶部与弹窗 Modal
   ========================================================================== */
.back-to-top {
    position: fixed;
    right: 32px;
    bottom: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-main);
    color: #FFFFFF;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.25);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition-smooth);
    z-index: 999;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

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

.back-to-top:hover {
    background: var(--color-accent);
    color: var(--color-main);
}

/* Modal */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-smooth);
}

.modal-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.modal-dialog {
    background: #FFFFFF;
    width: 100%;
    max-width: 600px;
    border-radius: var(--border-radius-card);
    padding: 2rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    position: relative;
    transform: translateY(20px);
    transition: var(--transition-smooth);
}

.modal-backdrop.active .modal-dialog {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 1.2rem;
}

.modal-header h3 {
    font-size: 1.25rem;
    color: var(--color-main);
}

.modal-close {
    font-size: 1.8rem;
    color: var(--color-text-muted);
    line-height: 1;
}

.modal-close:hover {
    color: var(--color-main);
}

.modal-body {
    font-size: 0.92rem;
    color: var(--color-text-body);
    line-height: 1.8;
}

.modal-body p {
    margin-bottom: 1rem;
}

/* ==========================================================================
   动画与关键帧
   ========================================================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes scrollWheel {
    0% {
        opacity: 1;
        transform: translate(-50%, 0);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, 14px);
    }
}

@keyframes pulseGlow {
    0% {
        transform: scale(0.8);
        opacity: 1;
    }
    100% {
        transform: scale(2.2);
        opacity: 0;
    }
}

/* ==========================================================================
   响应式断点适配 (Responsive Design)
   ========================================================================== */
@media (max-width: 1200px) {
    .capabilities-grid,
    .impact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-top-row {
        gap: 2.5rem;
    }
    .product-header-container {
        flex-direction: column;
        gap: 2.5rem;
    }
    .product-intro-left {
        width: 100%;
    }
}

@media (max-width: 992px) {
    .nav-menu {
        display: none;
    }
    .mobile-toggle,
    .mobile-drawer {
        display: flex;
    }
    .hero-title {
        font-size: 2.8rem;
    }
    .about-chagee-exact {
        grid-template-columns: 1fr;
    }
    .global-chagee-exact .exact-text-half {
        order: 2;
    }
    .global-chagee-exact .exact-visual-half {
        order: 1;
    }
    .exact-visual-half {
        min-height: 420px;
    }
    .exact-text-half {
        padding: 4rem 2rem;
    }
    .global-banner-inner {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    .news-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2.2rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .chagee-h2,
    .exact-title {
        font-size: 2.2rem;
    }
    .about-feature-grid {
        grid-template-columns: 1fr;
    }
    .capabilities-grid,
    .impact-grid {
        grid-template-columns: 1fr;
    }
    .global-stats-grid {
        grid-template-columns: 1fr;
    }
    .footer-top-row {
        grid-template-columns: 1fr;
    }
    .footer-brand-col {
        grid-column: span 1;
    }
    .footer-bottom-row {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}