/* ============================================
   DESIGN TOKENS
   ============================================ */
:root {
    /* Colors - 黑白灰配色 */
    --color-primary: #1a1a1a;
    --color-primary-dark: #000000;
    --color-primary-light: #f5f5f5;
    --color-secondary: #666666;
    --color-accent: #e8e8e8;
    --color-bg: #ffffff;
    --color-surface: #f8f8f8;
    --color-text: #1a1a1a;
    --color-muted: #6b6b6b;
    --color-border: #e0e0e0;
    --color-success: #4a4a4a;
    --color-warning: #888888;
    --color-error: #333333;

    /* Typography */
    --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    --font-en: "Inter", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", "Roboto Mono", monospace;

    /* Font Sizes */
    --text-display: clamp(40px, 5vw, 72px);
    --text-h1: clamp(32px, 3.5vw, 48px);
    --text-h2: clamp(28px, 2.5vw, 36px);
    --text-h3: clamp(20px, 1.8vw, 24px);
    --text-body: 16px;
    --text-caption: 14px;
    --text-button: 15px;

    /* Line Heights */
    --lh-display: 1.15;
    --lh-h1: 1.2;
    --lh-h2: 1.3;
    --lh-h3: 1.35;
    --lh-body: 1.75;
    --lh-caption: 1.6;
    --lh-button: 1;

    /* Spacing */
    --section-padding: clamp(60px, 8vw, 120px);
    --container-padding: clamp(20px, 2.5vw, 40px);
    --container-max: 1520px;
    --grid-gap: clamp(20px, 2vw, 32px);

    /* Border Radius */
    --radius-card: 8px;
    --radius-btn: 4px;

    /* Shadows */
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.12);

    /* Transitions */
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-cn);
    font-size: var(--text-body);
    line-height: var(--lh-body);
    color: var(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

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

/* ============================================
   LAYOUT
   ============================================ */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: var(--text-button);
    font-weight: 500;
    letter-spacing: 0.5px;
    line-height: var(--lh-button);
    padding: 14px 32px;
    border-radius: var(--radius-btn);
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: #fff;
}

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

.btn-outline-white:hover {
    background: #fff;
    color: var(--color-primary);
}

.btn-text {
    background: none;
    color: var(--color-primary);
    padding: 8px 0;
    border-bottom: 2px solid var(--color-primary);
}

.btn-text:hover {
    color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

.btn-sm {
    padding: 10px 20px;
    font-size: 14px;
}

.btn-lg {
    padding: 16px 40px;
    font-size: 16px;
}

/* ============================================
   HEADER
   ============================================ */
.site-header {
     position: relative;
     background: linear-gradient(to bottom, #ffffff 0%, rgba(255, 255, 255, 0.95) 70%, rgba(255, 255, 255, 0) 100%);
     padding: 16px 0;
     transition: all var(--transition-base);
     z-index: 100;
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 0;
}

.header-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

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

.logo-img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    transition: color var(--transition-base);
}

.site-header.scrolled .logo-text {
    color: var(--color-text);
}

/* Navigation */
.main-nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-item > a {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text);
    padding: 8px 0;
    position: relative;
    transition: color var(--transition-base);
}

.site-header.scrolled .nav-item > a {
    color: var(--color-text);
}

.nav-item > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

.nav-item > a:hover::after,
.nav-item.active > a::after {
    width: 100%;
}

.nav-item > a:hover {
    color: var(--color-primary);
}

.site-header.scrolled .nav-item > a:hover {
    color: var(--color-primary);
}

/* Dropdown */
.nav-item.has-dropdown {
    position: relative;
}

.dropdown-arrow {
    display: inline-block;
    vertical-align: middle;
    margin-left: 4px;
    transition: transform var(--transition-base);
}

.nav-item.has-dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: #fff;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card-hover);
    padding: 8px 0;
    min-width: 160px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.nav-item.has-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-menu li a {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
    color: var(--color-text);
    transition: all var(--transition-base);
}

.dropdown-menu li a:hover {
    background: var(--color-surface);
    color: var(--color-primary);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang-switcher {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--color-text);
    padding: 6px 10px;
    border-radius: 4px;
    transition: all var(--transition-base);
}

.site-header.scrolled .lang-btn {
    color: var(--color-text);
}

.lang-btn:hover {
    background: var(--color-surface);
}

.site-header.scrolled .lang-btn:hover {
    background: var(--color-surface);
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: #fff;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card-hover);
    padding: 8px 0;
    min-width: 120px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all var(--transition-base);
    z-index: 1001;
}

.lang-switcher:hover .lang-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown li a {
    display: block;
    padding: 8px 16px;
    font-size: 14px;
    transition: all var(--transition-base);
}

.lang-dropdown li a:hover,
.lang-dropdown li a.active {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.lang-dropdown li a.disabled {
    display: none;
}

.header-cta {
    display: inline-flex;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition-base);
}

.site-header.scrolled .hamburger-line {
    background: var(--color-text);
}

/* ============================================
   MOBILE MENU
   ============================================ */
.mobile-menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1100;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 300px;
    max-width: 85vw;
    background: #fff;
    z-index: 1200;
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    display: flex;
    flex-direction: column;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border);
}

.mobile-logo .logo-img {
    height: 36px;
}

.mobile-menu-close {
    padding: 8px;
    color: var(--color-text);
}

.mobile-nav {
    flex: 1;
    overflow-y: auto;
    padding: 20px 0;
}

.mobile-nav-list > li > a,
.mobile-dropdown-toggle {
    display: block;
    padding: 14px 24px;
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.mobile-nav-list > li > a:hover,
.mobile-dropdown-toggle:hover {
    background: var(--color-surface);
    color: var(--color-primary);
}

.mobile-dropdown-toggle {
    width: 100%;
    text-align: left;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.mobile-dropdown-toggle svg {
    transition: transform var(--transition-base);
}

.mobile-dropdown.expanded .mobile-dropdown-toggle svg {
    transform: rotate(180deg);
}

.mobile-dropdown-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.mobile-dropdown.expanded .mobile-dropdown-menu {
    max-height: 200px;
}

.mobile-dropdown-menu li a {
    display: block;
    padding: 12px 24px 12px 36px;
    font-size: 15px;
    color: var(--color-muted);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.mobile-dropdown-menu li a:hover {
    color: var(--color-primary);
    background: var(--color-surface);
}

.mobile-menu-footer {
    padding: 20px;
    border-top: 1px solid var(--color-border);
}

.mobile-lang-switcher {
    display: flex;
    gap: 12px;
}

.mobile-lang-switcher a {
    padding: 8px 16px;
    font-size: 14px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    transition: all var(--transition-base);
}

.mobile-lang-switcher a:hover,
.mobile-lang-switcher a.active {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.mobile-lang-switcher a.disabled {
    display: none;
}

/* ============================================
    HERO SECTION
    ============================================ */
.section-hero {
    position: relative;
    height: calc(100vh - 50px);
    min-height: 550px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    background: #ffffff;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}


/* ============================================
   SECTION COMMON
   ============================================ */
section:not(.section-hero):not(.section-company-business) {
    padding: var(--section-padding) 0;
}

.section-hero,
.section-company-business {
    padding: 0;
    margin: 0;
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 56px;
}

.section-header--dark {
    margin-bottom: 48px;
    position: relative;
}

.section-header-left {
    max-width: 560px;
    margin-bottom: 48px;
}

.section-label {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 12px;
    position: relative;
    padding-left: 48px;
}

.section-label::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 36px;
    height: 2px;
    background: var(--color-primary);
}

.section-title {
    font-size: var(--text-h2);
    font-weight: 600;
    line-height: var(--lh-h2);
    color: var(--color-text);
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
    padding-bottom: 12px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 2px;
    background: var(--color-primary);
}

.section-title--dark {
    color: #fff;
}

.section-desc {
    font-size: var(--text-body);
    line-height: var(--lh-body);
    color: var(--color-muted);
    text-align: center;
}

.section-cta {
    text-align: center;
    margin-top: 48px;
}

.section-cta-left {
    margin-top: 40px;
}

/* ============================================
   BUSINESS OVERVIEW
   ============================================ */
.section-business-overview {
    background: var(--color-bg);
}

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

.business-card {
    position: relative;
    border-radius: var(--radius-card);
    overflow: hidden;
    background: var(--color-surface);
    transition: all var(--transition-base);
}

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

.business-card-img {
    height: 220px;
    overflow: hidden;
}

.business-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.business-card:hover .business-card-img img {
    transform: scale(1.05);
}

.business-card-content {
    padding: 28px 24px;
}

.business-card-title {
    font-size: var(--text-h3);
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text);
}

.business-card-desc {
    font-size: var(--text-caption);
    color: var(--color-muted);
    margin-bottom: 16px;
    line-height: var(--lh-caption);
}

.business-card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-primary);
    transition: gap var(--transition-base);
}

.business-card:hover .business-card-link {
    gap: 10px;
}

/* ============================================
    走进道恒
    ============================================ */
.section-about-daoheng {
    background: var(--color-surface);
}

.about-daoheng-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-daoheng-content {
    display: flex;
    flex-direction: column;
}

.about-daoheng-company {
    font-size: var(--text-h3);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 16px;
    line-height: var(--lh-h3);
}

.about-daoheng-desc {
    font-size: var(--text-body);
    line-height: var(--lh-body);
    color: var(--color-muted);
    margin-bottom: 32px;
}

.about-daoheng-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 36px;
    padding: 24px 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.about-daoheng-stat {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
}

.about-daoheng-stat-number {
    font-size: clamp(28px, 2.5vw, 36px);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}

.about-daoheng-stat-label {
    font-size: var(--text-caption);
    color: var(--color-muted);
    line-height: var(--lh-caption);
}

.about-daoheng-image {
    border-radius: var(--radius-card);
    overflow: hidden;
}

.about-daoheng-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.about-daoheng-image:hover img {
    transform: scale(1.02);
}

.about-daoheng-content .btn-primary {
    width: 150px;
}

/* ============================================
    公司业务板块
    ============================================ */
.section-company-business {
    position: relative;
    min-height: 100vh;
    overflow: hidden;
}

.business-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.business-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 1;
    pointer-events: none;
}

.business-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: relative;
    z-index: 0;
    transition: opacity 600ms ease;
}

.business-bg img.fade-in {
    animation: bgFadeIn 600ms ease forwards;
}

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

.business-container {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 clamp(40px, 4vw, 80px);
    min-height: 100vh;
}

.business-left {
    display: flex;
    flex-direction: column;
    justify-content: center;
    flex: 1;
    padding-right: 48px;
}

.business-left-title {
    font-size: clamp(36px, 4vw, 56px);
    font-weight: 700;
    color: #fff;
    margin: 0;
    line-height: 1.2;
    opacity: 1;
    transition: opacity 300ms ease;
}

.business-left-line {
    width: 48px;
    height: 3px;
    background: #fff;
    margin: 20px 0 28px;
}

.business-left-desc {
    font-size: clamp(15px, 1.3vw, 18px);
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    max-width: 520px;
    opacity: 1;
    transition: opacity 300ms ease;
}

.business-left-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: #fff;
    transition: all var(--transition-base);
    flex-shrink: 0;
}

.business-left-btn:hover {
    border-color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

.business-right {
    position: absolute;
    right: 0;
    top: 0;
    width: clamp(220px, 20vw, 380px);
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 20px 32px;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(5px);
    overflow: visible;
    z-index: 2;
}

.business-right-item {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 16px;
    height: 200px;
    color: rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
    text-align: left;
    width: 100%;
    border: none;
    border-left: 3px solid transparent;
    background: transparent;
    cursor: pointer;
    font-size: 2px;
    font-family: inherit;
}

.business-right-item .tab-icon {
    width: 80px;
    height: 80px;
    flex-shrink: 0;
    opacity: 0.6;
    transition: opacity 0.3s ease;
    position: relative;
    z-index: 1;
}

.business-right-item span {
    position: relative;
    z-index: 1;
    font-size: 24px;
    transition: color 0.3s ease;
}

.business-right-item:hover,
.business-right-item.active {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
    border-left-color: #fff;
}

.business-right-item:hover .tab-icon,
.business-right-item.active .tab-icon {
    opacity: 1;
    color: #fff;
}

.business-right-item.active .tab-icon {
    opacity: 1;
}

.business-right-item.fade-out {
    opacity: 0.3;
}

/* ============================================
    RECOMMENDED INFO (legacy)
    ============================================ */
.recommended-card {
    position: relative;
    border-radius: var(--radius-card);
    overflow: hidden;
    background: var(--color-surface);
    transition: all var(--transition-base);
    min-height: 280px;
}

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

.recommended-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: 450px 450px 360px;
    gap: var(--grid-gap);
}

.recommended-card::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0) 100%);
    z-index: 1;
    pointer-events: none;
}

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

.recommended-card-wide {
    grid-column: span 2;
}

.recommended-card-narrow {
    grid-column: span 1;
}

.recommended-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.recommended-card-content {
    position: absolute;
    bottom: 10px;
    left: 0;
    right: 0;
    padding: 0 24px;
    color: #fff;
    transition: transform var(--transition-base);
    z-index: 2;
}

.recommended-card:hover .recommended-card-content {
    transform: translateY(-24px);
}

.recommended-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 8px;
}

.recommended-title {
    font-size: var(--text-h3);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 8px;
    color: #fff;
}

.recommended-desc {
    font-size: var(--text-caption);
    color: rgba(255, 255, 255, 0.7);
    line-height: var(--lh-caption);
}

.recommended-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    margin-top: 16px;
    opacity: 0;
    transform: translateY(8px);
    transition: all var(--transition-base);
}

.recommended-card:hover .recommended-link {
    opacity: 1;
    transform: translateY(0);
}

.recommended-link svg {
    transition: transform var(--transition-base);
    color: var(--color-primary);
}

.recommended-card:hover .recommended-link svg {
    transform: translateX(4px);
}

/* ============================================
    ABOUT HENGYUNFENG
    ============================================ */
.section-about-hengyunfeng {
    padding: 0;
}

.about-banner {
    position: relative;
    height: 480px;
    overflow: hidden;
}

.about-banner-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.about-banner-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.about-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.2) 60%, rgba(0, 0, 0, 0) 100%);
    z-index: 1;
    pointer-events: none;
}

.about-banner-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    align-items: center;
}

.about-banner-text {
    max-width: 700px;
}

.about-banner-title {
    font-size: var(--text-h1);
    font-weight: 700;
    line-height: var(--lh-h1);
    color: #fff;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 16px;
    white-space: nowrap;
}

.about-banner-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 2px;
    background: var(--color-primary);
}

.about-banner-desc {
    font-size: 18px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
}

.about-banner-text .btn-primary {
    background: var(--color-primary);
    color: #fff;
    padding: 14px 40px;
    font-size: 15px;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-btn);
    transition: all var(--transition-base);
}

.about-banner-text .btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
}

/* ============================================
    FEATURED PRODUCTS
    ============================================ */
.section-featured-products {
    background: var(--color-surface);
}

.products-scroll {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--grid-gap);
}

.product-card {
    background: #fff;
    border-radius: var(--radius-card);
    overflow: hidden;
    transition: all var(--transition-base);
}

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

.product-card-img {
    height: 200px;
    overflow: hidden;
    background: linear-gradient(135deg, #f8f8f8, #e0e0e0);
}

.product-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.product-card-content {
    padding: 24px 20px;
}

.product-brand {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.product-title {
    font-size: 17px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 10px;
    color: var(--color-text);
}

.product-desc {
    font-size: var(--text-caption);
    color: var(--color-muted);
    line-height: var(--lh-caption);
}

/* ============================================
   ADVANTAGES
   ============================================ */
.section-advantages {
    background: var(--color-bg);
}

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

.advantage-item {
    padding: 32px 24px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    transition: all var(--transition-base);
}

.advantage-item:hover {
    border-color: #666666;
    background: var(--color-primary-light);
}

.advantage-number {
    font-size: clamp(48px, 5vw, 72px);
    font-weight: 700;
    color: #666666;
    line-height: 1;
    margin-bottom: 16px;
    font-family: var(--font-en);
}

.advantage-title {
    font-size: var(--text-h3);
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-text);
}

.advantage-desc {
    font-size: var(--text-caption);
    color: var(--color-muted);
    line-height: var(--lh-caption);
}

/* ============================================
   PARTNERS
   ============================================ */
.section-partners {
    background: var(--color-surface);
    padding: 80px 0;
}

.partners-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 48px;
}

.partner-logo {
    padding: 16px 24px;
    filter: grayscale(100%);
    opacity: 0.6;
    transition: all var(--transition-base);
}

.partner-logo:hover {
    filter: grayscale(0%);
    opacity: 1;
}

.partner-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: 1px;
}

/* ============================================
   NEWS PREVIEW
   ============================================ */
.section-news-preview {
    background: var(--color-bg);
    padding: 80px 0;
}

.news-preview-layout {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 32px;
    margin-bottom: 40px;
}

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

.event-card {
    background: #f8f8f8;
    border-radius: 4px;
    overflow: hidden;
    transition: all var(--transition-base);
}

.event-card:hover {
    box-shadow: var(--shadow-card);
}

.event-card-img {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.event-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.event-tag {
    position: absolute;
    top: 12px;
    left: 12px;
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    font-size: 12px;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 2px;
}

.event-card-content {
    padding: 20px;
}

.event-title {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.5;
    margin-bottom: 12px;
    color: var(--color-text);
}

.event-meta {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: 12px;
}

.event-meta svg {
    width: 14px;
    height: 14px;
    vertical-align: -2px;
    margin-right: 4px;
}

.event-desc {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.6;
}

.news-list-panel {
    background: #f8f8f8;
    border-radius: 4px;
    padding: 24px;
    max-height: 420px;
    overflow-y: auto;
}

.news-list-panel::-webkit-scrollbar {
    width: 4px;
}

.news-list-panel::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 2px;
}

.news-list-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.news-list-item {
    display: block;
    padding: 16px 20px;
    background: #fff;
    border-radius: 4px;
    transition: all 0.3s ease;
    text-decoration: none;
}

.news-list-item:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.news-list-date {
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: 8px;
}

.news-list-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
    line-height: 1.5;
}
    line-height: 1.5;
    color: var(--color-text);
    margin-bottom: 4px;
}

.news-list-item-date {
    font-size: 13px;
    color: var(--color-muted);
}

.news-preview-actions {
    display: flex;
    justify-content: center;
    gap: 24px;
}

.news-preview-actions .btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    padding: 10px 32px;
    font-size: 14px;
    font-weight: 500;
    border-radius: 2px;
    transition: all var(--transition-base);
}

.news-preview-actions .btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* ============================================
   FINAL CTA
   ============================================ */
.section-final-cta {
    position: relative;
    background: url('../images/cta-bg.jpg') center center / cover no-repeat;
    padding: 100px 0;
    text-align: center;
}

.section-final-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 0;
}

.section-final-cta .container {
    position: relative;
    z-index: 1;
}

.cta-content {
    max-width: 640px;
    margin: 0 auto;
}

.cta-title {
    font-size: var(--text-h1);
    font-weight: 700;
    line-height: var(--lh-h1);
    color: #fff;
    margin-bottom: 20px;
}

.cta-desc {
    font-size: 18px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 40px;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
    background: #111;
    color: rgba(255, 255, 255, 0.7);
    padding: 64px 0 32px;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 64px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo .logo-text {
    color: #fff;
    font-size: 18px;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.7;
    max-width: 400px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, max-content);
    gap: 160px;
    justify-self: end;
}

.footer-col-title {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-base);
}

.footer-col ul li a:hover {
    color: #fff;
}

.footer-bottom {
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copyright {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

.icp-link {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
    text-decoration: none;
    transition: color 300ms ease;
}

.icp-link:hover {
    color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   ANIMATIONS
   ============================================ */
[data-animate] {
    opacity: 1;
    transform: none;
    transition: opacity 600ms cubic-bezier(0.4, 0, 0.2, 1), transform 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-animate].visible {
    opacity: 1;
    transform: none;
}

[data-animate][data-delay="100"] { transition-delay: 100ms; }
[data-animate][data-delay="200"] { transition-delay: 200ms; }
[data-animate][data-delay="300"] { transition-delay: 300ms; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    [data-animate] {
        opacity: 1;
        transform: none;
    }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1023px) {
    .main-nav,
    .header-actions .lang-switcher,
    .header-cta {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .business-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .recommended-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .recommended-card-wide {
        grid-column: span 2;
    }

    .recommended-card-narrow {
        grid-column: span 1;
    }

    .about-banner {
        height: 400px;
    }

    .about-daoheng-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-daoheng-image {
        order: -1;
    }

    .about-banner-title {
        font-size: 32px;
    }

    .about-banner-desc {
        font-size: 16px;
    }

    .products-scroll {
        grid-template-columns: repeat(2, 1fr);
    }

    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .news-preview-layout {
        grid-template-columns: 1fr;
    }

    .news-list-panel {
        max-height: 300px;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }

    .section-company-business {
        min-height: 100vh;
    }

    .business-right {
        width: clamp(180px, 20vw, 240px);
    }
}

@media (max-width: 767px) {
    :root {
        --section-padding: 60px;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .business-grid,
    .recommended-grid,
    .products-scroll,
    .advantages-grid,
    .news-grid,
    .news-events-grid {
        grid-template-columns: 1fr;
    }

    .recommended-card-wide,
    .recommended-card-narrow {
        grid-column: span 1;
    }

    .about-banner {
        height: 360px;
    }

    .about-banner::before {
        background: linear-gradient(to right, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.4) 100%);
    }

    .about-banner-title {
        font-size: 24px;
        margin-bottom: 12px;
        padding-bottom: 12px;
    }

    .about-banner-title::after {
        width: 40px;
    }

    .about-banner-desc {
        font-size: 14px;
        margin-bottom: 24px;
        line-height: 1.6;
    }

    .about-banner-text .btn-primary {
        padding: 12px 28px;
        font-size: 14px;
    }

    .about-daoheng-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .about-daoheng-stat-number {
        font-size: 28px;
    }

    .about-daoheng-company {
        font-size: 20px;
    }

    .about-daoheng-desc {
        font-size: 14px;
    }

    .section-company-business {
        min-height: 100vh;
    }

    .business-left {
        padding: 80px clamp(24px, 4vw, 40px);
    }

    .business-left-title {
        font-size: 32px;
    }

    .business-left-desc {
        font-size: 14px;
    }

    .business-right {
        width: clamp(180px, 25vw, 260px);
    }

    .business-right-item {
        padding: 16px 14px;
        font-size: 14px;
    }

    .business-right-item .tab-icon {
        width: 24px;
        height: 24px;
    }

    .partners-grid {
        gap: 24px;
    }

    .partner-text {
        font-size: 14px;
    }

    .section-final-cta {
        padding: 60px 0;
    }

    .cta-title {
        font-size: 28px;
    }

    .cta-actions {
        flex-direction: column;
    }

    .cta-actions .btn {
        width: 100%;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .section-news-preview {
        padding: 60px 0;
    }

    .news-preview-layout {
        gap: 24px;
    }

    .news-events-grid {
        grid-template-columns: 1fr;
    }

    .news-list-panel {
        max-height: 280px;
    }

    .news-preview-actions {
        flex-direction: column;
        gap: 12px;
    }

    .news-preview-actions .btn-outline {
        width: 100%;
        text-align: center;
    }
}

/* ============================================
   HEADER SEARCH
   ============================================ */
.header-search {
    position: relative;
    display: flex;
    align-items: center;
}

.search-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--color-text);
    cursor: pointer;
    border-radius: var(--radius-btn);
    transition: all var(--transition-base);
}

.search-toggle:hover {
    background: var(--color-surface);
    color: var(--color-primary);
}

.search-panel {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    width: 400px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-base);
    z-index: 1000;
}

.search-panel.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.search-input-wrap {
    position: relative;
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-border);
}

.search-input-icon {
    position: absolute;
    left: 16px;
    color: var(--color-muted);
    pointer-events: none;
}

.search-input {
    flex: 1;
    width: 100%;
    padding: 8px 40px 8px 36px;
    border: none;
    background: transparent;
    font-size: 14px;
    color: var(--color-text);
    outline: none;
}

.search-input::placeholder {
    color: var(--color-muted);
}

.search-close-btn {
    position: absolute;
    right: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    color: var(--color-muted);
    cursor: pointer;
    border-radius: var(--radius-btn);
    transition: all var(--transition-base);
}

.search-close-btn:hover {
    background: var(--color-surface);
    color: var(--color-text);
}

@media (max-width: 768px) {
    .search-panel {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        border: none;
        border-radius: 0;
        transform: none;
    }

    .search-panel:not(.active) {
        transform: translateY(-100%);
    }
}