/* ============================
   森荣商标布 · 杂志编辑风
   Magazine Editorial Style
============================ */

/* ===== 字体导入 ===== */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;0,800;0,900;1,400;1,500&family=Noto+Serif+SC:wght@300;400;500;600;700;900&family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&display=swap');

/* ===== 变量 ===== */
:root {
    --gold: #b8945f;
    --gold-light: #cdaa72;
    --gold-dark: #9a7a4a;
    --ink: #1c1c1c;
    --ink-soft: #2a2a2a;
    --charcoal: #333333;
    --gray: #6b6b6b;
    --gray-light: #999999;
    --cream: #ede2d0;
    --cream-warm: #e5d5be;
    --paper: #f5ede1;
    --line: #d4c7b3;
    --line-soft: #ded2c0;
    --white: #ffffff;
    --serif: 'Playfair Display', 'Noto Serif SC', Georgia, serif;
    --serif-cn: 'Noto Serif SC', 'Songti SC', serif;
    --sans: -apple-system, 'Helvetica Neue', Arial, sans-serif;
    --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ===== Reset ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--sans);
    color: var(--charcoal);
    background: var(--paper);
    line-height: 1.75;
    font-size: 15px;
    letter-spacing: 0.02em;
    -webkit-font-smoothing: antialiased;
}

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

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

ul {
    list-style: none;
}

/* ===== 容器 ===== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 48px;
}

/* ===== 通用排版 ===== */
.serif {
    font-family: var(--serif);
}

.section-tag {
    display: inline-block;
    font-family: var(--serif);
    font-size: 13px;
    font-style: italic;
    color: var(--gold);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 16px;
    position: relative;
    padding-left: 32px;
}

.section-tag::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 22px;
    height: 1px;
    background: var(--gold);
}

.section-title {
    font-family: var(--serif-cn);
    font-size: 38px;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.3;
    margin-bottom: 20px;
    letter-spacing: 0.04em;
}

.section-desc {
    font-size: 15px;
    color: var(--gray);
    max-width: 600px;
    line-height: 1.8;
    margin-bottom: 0;
}

.section-header {
    margin-bottom: 60px;
    max-width: 700px;
}

.section-header.center {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.section-header.center .section-tag {
    padding-left: 0;
}

.section-header.center .section-tag::before {
    display: none;
}

.bg-cream {
    background: var(--cream);
}

.bg-paper {
    background: var(--paper);
}

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

.mt-4 {
    margin-top: 48px;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 0;
    font-family: var(--sans);
    gap: 8px;
}

.btn-primary {
    background: var(--ink);
    color: var(--paper);
}

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

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

.btn-outline:hover {
    background: var(--ink);
    color: var(--paper);
}

.btn-gold {
    background: var(--gold);
    color: var(--paper);
}

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

.btn-white {
    background: var(--paper);
    color: var(--ink);
}

.btn-white:hover {
    background: var(--gold);
    color: var(--paper);
}

.btn-sm {
    padding: 10px 24px;
    font-size: 13px;
}

.btn-xs {
    padding: 6px 16px;
    font-size: 12px;
    border-radius: 6px;
}

.btn-submit {
    width: 100%;
    padding: 16px;
}

/* ===== 导航 ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(245, 237, 225, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(245, 237, 225, 0.98);
    border-bottom-color: var(--line);
    box-shadow: 0 2px 30px rgba(0, 0, 0, 0.04);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.logo-text h1,
.logo-text h3 {
    font-family: var(--serif-cn);
    font-size: 20px;
    font-weight: 600;
    color: var(--ink);
    line-height: 1;
    margin-bottom: 3px;
    letter-spacing: 0.06em;
}

.logo-text span {
    font-family: var(--serif);
    font-size: 11px;
    font-style: italic;
    color: var(--gold);
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.main-nav ul {
    display: flex;
    gap: 8px;
}

.main-nav a {
    display: block;
    padding: 8px 20px;
    font-size: 14px;
    font-weight: 400;
    color: var(--charcoal);
    letter-spacing: 0.08em;
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 20px;
    right: 20px;
    height: 1px;
    background: var(--gold);
    transform: scaleX(0);
    transition: var(--transition);
    transform-origin: left;
}

.main-nav a:hover::after,
.main-nav a.active::after {
    transform: scaleX(1);
}

.main-nav a.active {
    color: var(--gold);
}

/* Language Switch */
.lang-switch-item {
    margin-left: 8px;
}

.lang-switch {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 14px !important;
    border: 1.5px solid var(--gold) !important;
    border-radius: 20px !important;
    color: var(--gold) !important;
    font-size: 0.85rem !important;
    font-weight: 600;
    transition: all 0.3s ease !important;
    text-decoration: none !important;
    white-space: nowrap;
}

.lang-switch::after {
    display: none !important;
}

.lang-switch:hover {
    background: var(--gold) !important;
    color: #fff !important;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 26px;
    height: 2px;
    background: var(--ink);
    transition: var(--transition);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ===== Hero Banner ===== */
.hero-banner {
    position: relative;
    height: 100vh;
    min-height: 640px;
    overflow: hidden;
    margin-top: 80px;
}

.banner-slides {
    position: absolute;
    inset: 0;
}

.banner-slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    opacity: 0;
    transition: opacity 1.2s ease;
    z-index: 1;
}

.banner-slide.active {
    opacity: 1;
    z-index: 2;
}

.banner-slide::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(28, 28, 28, 0.7) 0%, rgba(28, 28, 28, 0.4) 50%, rgba(184, 148, 95, 0.2) 100%);
}

.banner-content {
    position: relative;
    z-index: 3;
    width: 100%;
    padding: 60px 0;
}

.banner-content h2 {
    font-family: var(--serif-cn);
    font-size: 56px;
    font-weight: 700;
    color: #fff;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: 0.05em;
    max-width: 700px;
}

.banner-content p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.8;
    max-width: 560px;
    margin-bottom: 40px;
    font-weight: 300;
}

.banner-btns {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.banner-btns .btn-primary {
    background: var(--gold);
}

.banner-btns .btn-primary:hover {
    background: var(--gold-dark);
}

.banner-btns .btn-outline {
    color: #fff;
    border-color: rgba(255, 255, 255, 0.5);
}

.banner-btns .btn-outline:hover {
    background: #fff;
    color: var(--ink);
    border-color: #fff;
}

.banner-dots {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.banner-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.banner-dot.active {
    background: var(--gold);
    border-color: var(--gold);
    width: 30px;
    border-radius: 5px;
}

.banner-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    font-size: 18px;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.banner-arrow:hover {
    background: var(--gold);
    border-color: var(--gold);
}

.banner-prev {
    left: 48px;
}

.banner-next {
    right: 48px;
}

/* ===== Banner · 产品供应链（第一张） ===== */
.banner-products {
    background: var(--ink);
}

.banner-products::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 75% 50%, rgba(184, 148, 95, 0.12) 0%, transparent 55%),
        linear-gradient(180deg, var(--ink) 0%, #151515 100%);
}

.banner-products .banner-content {
    padding: 80px 0;
}

.banner-products-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.banner-eyebrow {
    display: block;
    font-family: var(--serif);
    font-size: 14px;
    font-style: italic;
    color: var(--gold);
    letter-spacing: 0.25em;
    text-transform: uppercase;
    margin-bottom: 24px;
    position: relative;
    padding-left: 40px;
}

.banner-eyebrow::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 28px;
    height: 1px;
    background: var(--gold);
}

.banner-mag-title {
    font-family: var(--serif-cn);
    font-size: 52px;
    font-weight: 700;
    color: #fff;
    line-height: 1.25;
    letter-spacing: 0.04em;
    margin-bottom: 28px;
}

.banner-mag-title em {
    font-family: var(--serif);
    font-style: italic;
    font-weight: 500;
    color: var(--gold);
    font-size: 0.85em;
    letter-spacing: 0.02em;
}

.banner-mag-desc {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.9;
    max-width: 440px;
    margin-bottom: 40px;
    font-weight: 300;
}

/* 产品链网格 - 8品类4列布局 */
.product-chain-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: rgba(184, 148, 95, 0.15);
    border: 1px solid rgba(184, 148, 95, 0.2);
}

.chain-item {
    background: var(--ink);
    padding: 22px 18px;
    display: flex;
    flex-direction: column;
    gap: 5px;
    transition: var(--transition);
    cursor: default;
    position: relative;
    overflow: hidden;
}

/* 虚化产品图片融入背景 */
.chain-item::before {
    content: '';
    position: absolute;
    inset: -5px;
    background-image: var(--bg-img, none);
    background-size: cover;
    background-position: center;
    filter: blur(2px) grayscale(20%);
    opacity: 0.40;
    transition: var(--transition);
    z-index: 0;
}

/* 深色叠加层确保文字可读 */
.chain-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(28, 28, 28, 0.55), rgba(15, 15, 15, 0.65));
    transition: var(--transition);
    z-index: 0;
}

.chain-item:hover::before {
    opacity: 0.55;
    filter: blur(1px) grayscale(10%);
}

.chain-item:hover::after {
    background: linear-gradient(135deg, rgba(184, 148, 95, 0.15), rgba(28, 28, 28, 0.50));
}

.chain-item > * {
    position: relative;
    z-index: 1;
}

.chain-item-wide {
    grid-column: span 3;
    padding: 24px;
    flex-direction: row;
    align-items: center;
    gap: 16px;
    justify-content: center;
}

.chain-num {
    font-family: var(--serif);
    font-size: 28px;
    font-weight: 400;
    font-style: italic;
    color: var(--gold);
    line-height: 1;
}

.chain-name {
    font-family: var(--serif-cn);
    font-size: 15px;
    font-weight: 500;
    color: #fff;
    letter-spacing: 0.05em;
}

.chain-en {
    font-family: var(--serif);
    font-size: 11px;
    font-style: italic;
    color: rgba(255, 255, 255, 0.4);
    letter-spacing: 0.08em;
}

.chain-item-wide .chain-num {
    font-size: 24px;
}

.chain-item-wide .chain-name {
    font-size: 16px;
}

/* ===== Banner · 深耕卅载（第二张） ===== */
.banner-years {
    background: var(--ink);
}

.banner-years::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 25% 50%, rgba(184, 148, 95, 0.10) 0%, transparent 55%),
        linear-gradient(180deg, #151515 0%, var(--ink) 100%);
}

.banner-years .banner-content {
    padding: 80px 0;
}

.banner-years-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

/* 30年大数字展示 */
.years-display {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 48px;
}

.years-number {
    font-family: var(--serif);
    font-size: 160px;
    font-weight: 700;
    color: var(--gold);
    line-height: 0.85;
    letter-spacing: -0.03em;
}

.years-suffix {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-top: 20px;
}

.years-unit {
    font-family: var(--serif);
    font-size: 18px;
    font-style: italic;
    color: rgba(255, 255, 255, 0.4);
    letter-spacing: 0.2em;
}

.years-label {
    font-family: var(--serif-cn);
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 0.1em;
}

/* 仓储布局组件 */
.warehouse-map {
    border-top: 1px solid rgba(184, 148, 95, 0.2);
    padding-top: 28px;
}

.warehouse-group {
    margin-bottom: 20px;
}

.warehouse-group:last-child {
    margin-bottom: 0;
}

.warehouse-group-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--serif);
    font-size: 13px;
    font-style: italic;
    color: var(--gold);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 14px;
}

.warehouse-group-label i {
    font-size: 8px;
}

.warehouse-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.warehouse-tag {
    padding: 8px 18px;
    font-family: var(--serif-cn);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 0.06em;
    transition: var(--transition);
}

.warehouse-tag-active {
    color: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(184, 148, 95, 0.4);
    background: rgba(184, 148, 95, 0.06);
}

.warehouse-tag-active:hover {
    border-color: var(--gold);
    color: var(--gold);
    background: rgba(184, 148, 95, 0.12);
}

.warehouse-tag-plan {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.35);
    border: 1px dashed rgba(255, 255, 255, 0.18);
    font-weight: 400;
}

.warehouse-tag-plan:hover {
    border-color: rgba(184, 148, 95, 0.35);
    color: rgba(184, 148, 95, 0.6);
}

.warehouse-connector {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0 16px;
}

.connector-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, rgba(184, 148, 95, 0.3), rgba(184, 148, 95, 0.08));
}

.connector-arrow {
    color: rgba(184, 148, 95, 0.4);
    font-size: 14px;
}

/* ===== Banner · 一站式方案（第三张） ===== */
.banner-service {
    background: var(--ink);
}

.banner-service::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 70% 40%, rgba(184, 148, 95, 0.12) 0%, transparent 55%),
        linear-gradient(180deg, var(--ink) 0%, #121212 100%);
}

.banner-service .banner-content {
    padding: 80px 0;
}

.banner-service-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

/* 服务流程步骤 */
.service-steps {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: rgba(184, 148, 95, 0.15);
    border: 1px solid rgba(184, 148, 95, 0.2);
}

.service-step {
    background: rgba(28, 28, 28, 0.9);
    padding: 26px 32px;
    display: flex;
    align-items: center;
    gap: 24px;
    transition: var(--transition);
}

.service-step:hover {
    background: rgba(184, 148, 95, 0.06);
}

.step-num {
    font-family: var(--serif);
    font-size: 26px;
    font-weight: 400;
    font-style: italic;
    color: var(--gold);
    line-height: 1;
    flex-shrink: 0;
}

.step-body {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.step-name {
    font-family: var(--serif-cn);
    font-size: 18px;
    font-weight: 500;
    color: #fff;
    letter-spacing: 0.06em;
}

.step-desc {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.45);
    letter-spacing: 0.04em;
    line-height: 1.6;
}

/* 24小时上门服务徽章 */
.service-promise-badge {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 20px;
    padding: 18px 28px;
    border: 1px solid rgba(184, 148, 95, 0.35);
    background: linear-gradient(135deg, rgba(184, 148, 95, 0.08), rgba(184, 148, 95, 0.02));
}

.promise-badge-icon {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold);
    font-size: 18px;
    flex-shrink: 0;
}

.promise-badge-num {
    font-family: var(--serif);
    font-size: 32px;
    font-weight: 700;
    color: var(--gold);
    line-height: 1;
    letter-spacing: -0.02em;
    flex-shrink: 0;
}

.promise-badge-text {
    font-family: var(--serif-cn);
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 0.06em;
    line-height: 1.5;
}

.section {
    padding: 120px 0;
}

/* ===== 公司简介 ===== */
.intro-section {
    padding: 120px 0;
}

.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
    align-items: center;
}

.intro-image {
    position: relative;
}

.intro-image img {
    width: 100%;
    height: 520px;
    object-fit: cover;
    filter: sepia(0.08) contrast(1.02);
}

.intro-image::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    width: 120px;
    height: 120px;
    border-top: 2px solid var(--gold);
    border-left: 2px solid var(--gold);
    z-index: 2;
}

.intro-image::after {
    content: '';
    position: absolute;
    bottom: -20px;
    right: -20px;
    width: 120px;
    height: 120px;
    border-bottom: 2px solid var(--gold);
    border-right: 2px solid var(--gold);
    z-index: 2;
}

/* ===== Intro Section ===== */
.intro-image-badge {
    position: absolute;
    bottom: 30px;
    left: -30px;
    background: var(--ink);
    color: var(--paper);
    padding: 24px 32px;
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.badge-number {
    font-family: var(--serif);
    font-size: 44px;
    font-weight: 700;
    color: var(--gold);
    line-height: 1;
}

.badge-text {
    font-size: 12px;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 4px;
}

.intro-content h3 {
    font-family: var(--serif-cn);
    font-size: 28px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 24px;
    line-height: 1.4;
}

.intro-content p {
    font-size: 15px;
    color: var(--gray);
    line-height: 2;
    margin-bottom: 20px;
    text-align: justify;
}

.intro-content p:first-of-type::first-letter {
    font-family: var(--serif);
    font-size: 56px;
    font-weight: 700;
    color: var(--gold);
    float: left;
    line-height: 1;
    margin: 4px 12px 0 0;
}

.intro-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 32px 0;
}

.intro-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--ink-soft);
}

.intro-feature i {
    color: var(--gold);
    font-size: 16px;
}

/* ===== 产品网格 (首页) ===== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

/* 8大品类网格 - 4列布局 */
.products-grid-8 {
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.product-cat-num {
    font-family: var(--serif);
    font-size: 13px;
    font-style: italic;
    color: var(--gold);
    letter-spacing: 0.15em;
    display: block;
    margin-bottom: 8px;
}

.product-card {
    background: var(--paper);
    border: 1px solid var(--line-soft);
    transition: var(--transition);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(154, 122, 74, 0.12);
    border-color: var(--gold);
}

.product-image {
    overflow: hidden;
    height: 300px;
    position: relative;
}

.products-grid-8 .product-image {
    height: 220px;
}

.product-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent 60%, rgba(0,0,0,0.15));
    opacity: 0;
    transition: var(--transition);
}

.product-card:hover .product-image::after {
    opacity: 1;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

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

.product-info {
    padding: 24px 24px 28px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.product-info h3 {
    font-family: var(--serif-cn);
    font-size: 20px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 10px;
    line-height: 1.3;
}

.product-info p {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

.product-link {
    font-family: var(--serif);
    font-size: 13px;
    font-style: italic;
    color: var(--gold);
    letter-spacing: 0.1em;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border-bottom: 1px solid transparent;
    padding-bottom: 2px;
}

.product-link:hover {
    border-bottom-color: var(--gold);
    gap: 12px;
}

/* ===== 应用场景 - 横向轮转 ===== */
.scenarios-marquee {
    overflow: hidden;
    position: relative;
    padding: 8px 0;
    -webkit-mask-image: linear-gradient(to right, transparent 0%, #000 50px, #000 calc(100% - 50px), transparent 100%);
    mask-image: linear-gradient(to right, transparent 0%, #000 50px, #000 calc(100% - 50px), transparent 100%);
}

.scenarios-track {
    display: flex;
    width: max-content;
    animation: scenario-marquee 180s linear infinite;
}

.scenarios-track:hover {
    animation-play-state: paused;
}

@keyframes scenario-marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.scenario-card {
    position: relative;
    overflow: hidden;
    flex: 0 0 260px;
    height: 200px;
    margin-right: 20px;
    cursor: pointer;
    border-radius: 4px;
}

.scenario-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
    filter: sepia(0.1) brightness(0.95);
}

.scenario-card:hover img {
    transform: scale(1.08);
    filter: sepia(0) brightness(1);
}

.scenario-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(28,28,28,0.85) 0%, transparent 55%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 18px 20px;
    transition: var(--transition);
}

.scenario-overlay h3 {
    font-family: var(--serif-cn);
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 3px;
    letter-spacing: 0.03em;
}

.scenario-overlay p {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.75);
    opacity: 0;
    transform: translateY(8px);
    transition: var(--transition);
}

.scenario-card:hover .scenario-overlay p {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    .scenarios-track {
        animation: none;
    }
}

/* ===== 数据统计 ===== */
.stats-section {
    background: var(--ink);
    color: var(--paper);
    padding: 100px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-item {
    border-right: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item:last-child {
    border-right: none;
}

.stat-icon {
    font-size: 28px;
    color: var(--gold);
    margin-bottom: 20px;
}

.stat-number {
    font-family: var(--serif);
    font-size: 56px;
    font-weight: 700;
    color: var(--paper);
    line-height: 1;
    margin-bottom: 12px;
}

.stat-label {
    font-family: var(--serif-cn);
    font-size: 15px;
    color: rgba(255, 255, 255, 0.6);
    letter-spacing: 0.1em;
}

/* ===== 最新动态 ===== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.news-card {
    display: flex;
    gap: 24px;
    align-items: flex-start;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--line);
    transition: var(--transition);
}

.news-card:hover {
    border-bottom-color: var(--gold);
}

.news-date {
    flex-shrink: 0;
    text-align: center;
    min-width: 70px;
}

.news-day {
    display: block;
    font-family: var(--serif);
    font-size: 40px;
    font-weight: 700;
    color: var(--ink);
    line-height: 1;
}

.news-month {
    display: block;
    font-size: 12px;
    color: var(--gray-light);
    letter-spacing: 0.1em;
    margin-top: 4px;
}

.news-content h3 {
    font-family: var(--serif-cn);
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 10px;
    line-height: 1.5;
    transition: var(--transition);
}

.news-card:hover .news-content h3 {
    color: var(--gold);
}

.news-content p {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 12px;
}

.news-link {
    font-family: var(--serif);
    font-size: 13px;
    font-style: italic;
    color: var(--gold);
    letter-spacing: 0.08em;
}

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

/* ===== CTA ===== */
.cta-section {
    background: var(--cream);
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    border: 1px solid var(--line);
    border-radius: 50%;
    opacity: 0.5;
}

.cta-section::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 400px;
    border: 1px solid var(--line);
    border-radius: 50%;
    opacity: 0.3;
}

.cta-content {
    position: relative;
    z-index: 2;
}

.cta-content h2 {
    font-family: var(--serif-cn);
    font-size: 40px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 20px;
    letter-spacing: 0.04em;
}

.cta-content p {
    font-size: 16px;
    color: var(--gray);
    margin-bottom: 36px;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--ink);
    color: rgba(255, 255, 255, 0.7);
    padding: 80px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo-text h3 {
    color: #fff;
}

.footer-brand .logo-text span {
    color: var(--gold);
}

.footer-brand > p {
    font-size: 14px;
    line-height: 1.8;
    margin: 24px 0;
    color: rgba(255, 255, 255, 0.5);
    max-width: 400px;
}

.footer-contact p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-contact i {
    color: var(--gold);
    width: 16px;
}

.footer-links h4 {
    font-family: var(--serif-cn);
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 24px;
    color: #fff;
    letter-spacing: 0.06em;
}

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

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
    transition: var(--transition);
    display: inline-block;
}

.footer-links a:hover {
    color: var(--gold);
    padding-left: 6px;
}

.footer-bottom {
    padding: 28px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

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

.footer-copyright {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.footer-beian a {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.35);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-beian a:hover {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: underline;
}

/* ===== 子页面Banner ===== */
.page-banner {
    margin-top: 80px;
    height: 360px;
    display: flex;
    align-items: center;
    background: var(--ink);
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 70% 50%, rgba(184, 148, 95, 0.15) 0%, transparent 60%);
}

.page-banner .container {
    position: relative;
    z-index: 2;
}

.page-banner h2 {
    font-family: var(--serif-cn);
    font-size: 48px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
    letter-spacing: 0.06em;
}

.page-banner p {
    font-family: var(--serif);
    font-size: 18px;
    font-style: italic;
    color: var(--gold);
    letter-spacing: 0.15em;
}

/* ===== 关于我们页 Banner 带背景图 ===== */
.page-banner--about {
    background: var(--ink) url('../assets/images/about_banner.jpg') center center / cover no-repeat;
}

.page-banner--about::before {
    background: linear-gradient(135deg, rgba(28, 28, 28, 0.75) 0%, rgba(28, 28, 28, 0.55) 50%, rgba(28, 28, 28, 0.7) 100%);
}

.page-banner--about::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 70% 50%, rgba(184, 148, 95, 0.2) 0%, transparent 60%);
    z-index: 1;
}

/* ===== 产品页 Banner ===== */
.page-banner--products {
    background: var(--ink) url('../assets/images/products_banner.jpg') center center / cover no-repeat;
}

.page-banner--products::before {
    background: linear-gradient(135deg, rgba(28, 28, 28, 0.78) 0%, rgba(28, 28, 28, 0.5) 50%, rgba(28, 28, 28, 0.72) 100%);
}

.page-banner--products::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(184, 148, 95, 0.18) 0%, transparent 60%);
    z-index: 1;
}

/* ===== 联系我们页 Banner ===== */
.page-banner--contact {
    background: var(--ink) url('../assets/images/contact_banner.jpg') center center / cover no-repeat;
}

.page-banner--contact::before {
    background: linear-gradient(135deg, rgba(28, 28, 28, 0.78) 0%, rgba(28, 28, 28, 0.5) 50%, rgba(28, 28, 28, 0.72) 100%);
}

.page-banner--contact::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 40% 50%, rgba(184, 148, 95, 0.18) 0%, transparent 60%);
    z-index: 1;
}

/* ===== 仓库地址模块 ===== */
.warehouse-section {
    background: var(--paper);
    padding: 60px 0;
    border-top: 1px solid var(--line-soft);
}

.warehouse-section .section-header {
    text-align: center;
    max-width: none;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 40px;
}

.warehouse-section .section-header h2 {
    font-family: var(--serif);
    font-size: 32px;
    color: var(--ink);
    margin-bottom: 8px;
}

.warehouse-section .section-header p {
    color: var(--gold);
    letter-spacing: 0.15em;
    font-size: 13px;
    text-transform: uppercase;
}

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

.warehouse-card {
    background: #fff;
    border: 1px solid var(--line-soft);
    border-radius: 4px;
    padding: 20px 20px 20px 24px;
    transition: var(--transition);
    display: flex;
    align-items: stretch;
    gap: 0;
    overflow: hidden;
}

.warehouse-card:hover {
    border-color: var(--gold);
    box-shadow: 0 4px 20px rgba(184, 148, 95, 0.12);
    transform: translateY(-2px);
}

.warehouse-card-left {
    flex: 1;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    min-width: 0;
}

.warehouse-card-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--warm-ivory);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold);
    font-size: 20px;
}

.warehouse-card-body {
    flex: 1;
    min-width: 0;
}

.warehouse-card-visual {
    flex-shrink: 0;
    width: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border-left: 1px solid var(--line-soft);
    margin: -20px -20px -20px 16px;
}

.warehouse-card-visual img {
    width: 100%;
    height: auto;
    max-height: 200px;
    display: block;
}

.warehouse-card-body h4 {
    font-family: var(--serif-cn);
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 6px;
}

.warehouse-card-body p {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 10px;
}

.warehouse-card-body a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    color: var(--gold);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s;
}

.warehouse-card-body a:hover {
    border-bottom-color: var(--gold);
}

/* ===== 地址超链接区 ===== */
.location-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
}

.location-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--warm-ivory);
    border: 1px solid var(--line-soft);
    border-radius: 30px;
    font-size: 13px;
    color: var(--ink);
    text-decoration: none;
    transition: var(--transition);
}

.location-link:hover {
    background: var(--gold);
    color: #fff;
    border-color: var(--gold);
}

.location-link i {
    font-size: 14px;
}

/* ===== 关于我们 ===== */
.about-intro {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 70px;
    align-items: start;
}

.about-intro-image img {
    width: 100%;
    height: 500px;
    object-fit: cover;
    filter: sepia(0.06);
}

.about-intro-content h3 {
    font-family: var(--serif-cn);
    font-size: 26px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 28px;
    line-height: 1.5;
}

.about-intro-content p {
    font-size: 15px;
    color: var(--gray);
    line-height: 2.1;
    margin-bottom: 20px;
    text-align: justify;
}

.about-intro-content p:first-of-type::first-letter {
    font-family: var(--serif);
    font-size: 52px;
    font-weight: 700;
    color: var(--gold);
    float: left;
    line-height: 1;
    margin: 4px 12px 0 0;
}

/* ===== 发展历程 ===== */
/* ===== 发展历程 S型时间轴 ===== */
.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, transparent, var(--line) 4%, var(--line) 96%, transparent);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: 0 44px;
    margin-bottom: 36px;
}

.timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
}

.timeline-item:nth-child(even) {
    left: 50%;
    text-align: left;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    top: 12px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--paper);
    border: 3px solid var(--gold);
    z-index: 2;
    box-shadow: 0 0 0 4px var(--paper);
    transition: transform 0.3s, background 0.3s;
}

.timeline-item:hover::before {
    background: var(--gold);
    transform: scale(1.2);
}

.timeline-item:nth-child(odd)::before {
    right: -7px;
}

.timeline-item:nth-child(even)::before {
    left: -7px;
}

.timeline-item::after {
    content: '';
    position: absolute;
    top: 18px;
    width: 36px;
    height: 1px;
    background: var(--line);
}

.timeline-item:nth-child(odd)::after {
    right: 0;
}

.timeline-item:nth-child(even)::after {
    left: 0;
}

.timeline-year {
    font-family: var(--serif);
    font-size: 34px;
    font-weight: 700;
    color: var(--gold);
    line-height: 1;
    margin-bottom: 10px;
    letter-spacing: 0.02em;
}

.timeline-content {
    background: var(--white);
    border: 1px solid var(--line-soft);
    border-radius: 8px;
    padding: 18px 22px;
    transition: var(--transition);
}

.timeline-content:hover {
    border-color: var(--gold);
    box-shadow: 0 4px 20px rgba(184, 148, 95, 0.12);
    transform: translateY(-2px);
}

.timeline-content h3 {
    font-family: var(--serif-cn);
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 13px;
    color: var(--gray);
    line-height: 1.8;
}

/* ===== 企业文化 ===== */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.culture-card {
    text-align: center;
    padding: 48px 24px;
    background: var(--paper);
    border: 1px solid var(--line);
    transition: var(--transition);
}

.culture-card:hover {
    border-color: var(--gold);
    transform: translateY(-6px);
}

.culture-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    color: var(--gold);
    border: 1px solid var(--line);
    border-radius: 50%;
    transition: var(--transition);
}

.culture-card:hover .culture-icon {
    background: var(--gold);
    color: var(--paper);
    border-color: var(--gold);
}

.culture-card h3 {
    font-family: var(--serif-cn);
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 12px;
}

.culture-card p {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.8;
}

/* ===== 团队介绍 ===== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.team-card {
    text-align: center;
    padding: 40px 20px;
    transition: var(--transition);
}

.team-card:hover {
    transform: translateY(-6px);
}

.team-avatar {
    width: 90px;
    height: 90px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: var(--cream);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: var(--gold);
    border: 2px solid var(--line);
}

.team-card h3 {
    font-family: var(--serif-cn);
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 6px;
}

.team-role {
    font-family: var(--serif);
    font-size: 13px;
    font-style: italic;
    color: var(--gold);
    letter-spacing: 0.1em;
    margin-bottom: 14px;
}

.team-desc {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 12px;
}

.team-phone {
    font-size: 13px;
    color: var(--ink-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.team-phone i {
    color: var(--gold);
}

/* ===== 资质荣誉 ===== */
.honors-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.honor-card {
    padding: 40px 28px;
    background: var(--paper);
    border: 1px solid var(--line);
    transition: var(--transition);
}

.honor-card:hover {
    border-color: var(--gold);
    box-shadow: 0 10px 40px rgba(184, 148, 95, 0.1);
}

.honor-card i {
    font-size: 32px;
    color: var(--gold);
    margin-bottom: 20px;
}

.honor-card h3 {
    font-family: var(--serif-cn);
    font-size: 17px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 16px;
}

.honor-card p {
    font-size: 13px;
    color: var(--gray);
    line-height: 1.9;
    margin-bottom: 6px;
}

/* ===== 导航下拉菜单 ===== */
.has-dropdown {
    position: relative;
}

.nav-dropdown-arrow {
    font-size: 10px;
    margin-left: 4px;
    transition: transform 0.3s ease;
}

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

.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    display: block !important;
    flex-direction: column;
    background: rgba(245, 237, 225, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--line);
    border-top: 2px solid var(--gold);
    padding: 12px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all 0.3s ease;
    z-index: 100;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.has-dropdown:hover .nav-dropdown,
.has-dropdown.open .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-dropdown li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 24px;
    font-size: 14px;
    color: var(--charcoal);
    letter-spacing: 0.04em;
    transition: var(--transition);
}

.nav-dropdown li a i {
    width: 16px;
    color: var(--gold);
    font-size: 14px;
}

.nav-dropdown li a:hover {
    background: var(--cream);
    color: var(--gold);
    padding-left: 28px;
}

.nav-dropdown li a::after {
    display: none;
}

/* ===== 产品筛选 ===== */
.product-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    margin-bottom: 60px;
    border-bottom: 1px solid var(--line);
}

.filter-btn {
    padding: 14px 28px;
    font-size: 14px;
    font-weight: 400;
    color: var(--gray);
    background: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 0.06em;
    position: relative;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}

.filter-btn:hover {
    color: var(--ink);
}

.filter-btn.active {
    color: var(--gold);
    border-bottom-color: var(--gold);
}

/* ===== 产品页布局：侧边栏 + 内容区 ===== */
.product-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 40px;
    align-items: start;
}

/* ===== 产品侧边栏 ===== */
.product-sidebar {
    position: sticky;
    top: 100px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 12px;
    overflow: hidden;
}

.product-nav {
    padding: 0;
}

.product-nav-item {
    border-bottom: 1px solid var(--line-soft);
}

.product-nav-item:last-child {
    border-bottom: none;
}

.product-nav-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
}

.product-nav-header:hover {
    background: var(--cream);
}

.product-nav-item.active .product-nav-header {
    background: var(--ink);
    color: var(--paper);
}

.product-nav-item.active .product-nav-icon {
    background: var(--gold);
    color: var(--paper);
}

.product-nav-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--cream);
    color: var(--gold);
    border-radius: 8px;
    font-size: 16px;
    transition: var(--transition);
    flex-shrink: 0;
}

.product-nav-name {
    font-family: var(--serif-cn);
    font-size: 15px;
    font-weight: 500;
    color: var(--ink);
    letter-spacing: 0.04em;
    flex: 1;
}

.product-nav-item.active .product-nav-name {
    color: var(--paper);
}

.product-nav-toggle {
    font-size: 12px;
    color: var(--gray-light);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.product-nav-item.active .product-nav-toggle,
.product-nav-item.expanded .product-nav-toggle {
    transform: rotate(180deg);
    color: var(--gold);
}

/* 子类目下拉列表 */
.product-nav-sub {
    list-style: none;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    background: var(--paper);
}

.product-nav-item.active .product-nav-sub,
.product-nav-item.expanded .product-nav-sub {
    max-height: 400px;
    padding: 8px 0;
}

.product-nav-sub li a {
    display: block;
    padding: 8px 20px 8px 68px;
    font-size: 13px;
    color: var(--gray);
    letter-spacing: 0.03em;
    transition: var(--transition);
    cursor: pointer;
}

.product-nav-sub li a:hover,
.product-nav-sub li a.highlighted {
    color: var(--gold);
    background: rgba(184, 148, 95, 0.06);
}

/* ===== 主内容区 ===== */
.product-content {
    min-height: 500px;
}

.category-panel {
    display: none;
    animation: fadeInUp 0.5s ease forwards;
}

.category-panel.active {
    display: block;
}

.category-panel-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--gold);
}

/* ===== 分类分组 ===== */
.category-group {
    margin-bottom: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--line);
}

.category-group:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.category-group.hidden {
    display: none;
}

.category-group-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--gold);
}

.category-group-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gold);
    color: var(--paper);
    border-radius: 12px;
    font-size: 20px;
}

.category-group-header h3 {
    font-family: var(--serif-cn);
    font-size: 28px;
    font-weight: 700;
    color: var(--ink);
}

.category-group-header p {
    font-size: 14px;
    color: var(--gray);
    margin-left: 8px;
}

/* ===== 子分类网格 ===== */
.subcategory-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.subcategory-grid--7 {
    grid-template-columns: repeat(4, 1fr);
}

.subcategory-card {
    background: var(--white);
    border: 1px solid var(--line-soft);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.subcategory-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(184, 148, 95, 0.15);
}

.subcategory-image {
    height: 180px;
    overflow: hidden;
}

.subcategory-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
    filter: sepia(0.04);
}

.subcategory-card:hover .subcategory-image img {
    transform: scale(1.08);
    filter: sepia(0);
}

.subcategory-card h4 {
    font-family: var(--serif-cn);
    font-size: 16px;
    font-weight: 600;
    color: var(--ink);
    padding: 14px 16px 6px;
    line-height: 1.4;
}

.subcategory-card p {
    font-size: 13px;
    color: var(--gray);
    line-height: 1.6;
    padding: 0 16px 14px;
}

.subcategory-card .btn-xs {
    margin: 0 16px 14px;
}

/* ===== 特色产品（碳带尼克斯） ===== */
.featured-product {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 40px;
    align-items: center;
    background: var(--cream);
    border-radius: 16px;
    padding: 32px;
    margin-top: 24px;
}

.featured-product-image {
    overflow: hidden;
    border-radius: 12px;
    height: 280px;
}

.featured-product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: sepia(0.04);
    transition: transform 0.6s ease;
}

.featured-product:hover .featured-product-image img {
    transform: scale(1.05);
}

.featured-product-info h4 {
    font-family: var(--serif-cn);
    font-size: 22px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 14px;
}

.featured-product-info h4 i {
    color: var(--gold);
    margin-right: 8px;
}

.featured-product-info p {
    font-size: 14px;
    color: var(--gray);
    line-height: 2;
    margin-bottom: 18px;
}

.product-specs-mini {
    display: flex;
    gap: 16px;
    margin-bottom: 18px;
}

.product-specs-mini span {
    font-size: 13px;
    color: var(--ink-soft);
    background: var(--paper);
    padding: 6px 14px;
    border-radius: 6px;
    border: 1px solid var(--line-soft);
}

/* ===== 应用领域图标 ===== */
.applications-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 24px;
}

.application-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 32px 12px;
    text-align: center;
    border: 1px solid var(--line);
    transition: var(--transition);
}

.application-item:hover {
    border-color: var(--gold);
    background: var(--cream);
}

.application-item i {
    font-size: 28px;
    color: var(--gold);
}

.application-item span {
    font-family: var(--serif-cn);
    font-size: 14px;
    color: var(--ink-soft);
}

/* ===== 联系我们 ===== */
.contact-main {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-form-wrapper {
    background: var(--paper);
    padding: 0;
}

.contact-form-wrapper h3 {
    font-family: var(--serif-cn);
    font-size: 26px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 8px;
}

.contact-form-wrapper > p {
    font-family: var(--serif);
    font-size: 14px;
    font-style: italic;
    color: var(--gold);
    margin-bottom: 36px;
    letter-spacing: 0.05em;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--ink-soft);
    margin-bottom: 10px;
    letter-spacing: 0.06em;
}

.form-group label span {
    color: var(--gold);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--line);
    background: transparent;
    font-size: 14px;
    font-family: var(--sans);
    color: var(--ink);
    transition: var(--transition);
    border-radius: 0;
    letter-spacing: 0.02em;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--gold);
    background: var(--cream);
}

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

.form-group textarea {
    resize: vertical;
    min-height: 130px;
}

.contact-info-panel {
    background: var(--ink);
    padding: 56px 48px;
    color: var(--paper);
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 36px;
}

.contact-info-row {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-info-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border: 1px solid rgba(184, 148, 95, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: var(--gold);
}

.contact-info-text h4 {
    font-family: var(--serif-cn);
    font-size: 15px;
    font-weight: 500;
    color: #fff;
    margin-bottom: 6px;
}

.contact-info-text p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
}

.contact-info-text a {
    color: rgba(255, 255, 255, 0.6);
}

.contact-info-text a:hover {
    color: var(--gold);
}

/* ===== 全宽地图 ===== */
.map-fullwidth {
    width: 100%;
    height: 450px;
    overflow: hidden;
    position: relative;
}

.map-fullwidth iframe {
    width: 100%;
    height: 100%;
    border: none;
    filter: sepia(0.15) contrast(0.95);
}

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

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .container {
        padding: 0 32px;
    }

    .section {
        padding: 80px 0;
    }

    .intro-grid,
    .about-intro {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .intro-image img,
    .about-intro-image img {
        height: 400px;
    }

    .products-grid,
    .products-grid-8 {
        grid-template-columns: repeat(2, 1fr);
    }

    .scenario-card {
        flex: 0 0 220px;
        height: 170px;
    }

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

    .applications-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .banner-content h2 {
        font-size: 40px;
    }

    .banner-products-layout {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .banner-years-layout,
    .banner-service-layout {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .years-number {
        font-size: 120px;
    }

    .stat-big {
        font-size: 42px;
    }

    .banner-mag-title {
        font-size: 42px;
    }

    .product-chain-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .product-layout {
        grid-template-columns: 240px 1fr;
        gap: 32px;
    }

    .subcategory-grid,
    .subcategory-grid--7 {
        grid-template-columns: repeat(3, 1fr);
    }

    .featured-product {
        grid-template-columns: 1fr;
    }

    .featured-product-image {
        height: 240px;
    }

    .product-specs-mini {
        flex-wrap: wrap;
    }

    .contact-main {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

    .timeline-item {
        padding: 0 32px;
    }

    .timeline-year {
        font-size: 28px;
    }

    .timeline-content {
        padding: 16px 18px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 24px;
    }

    .section {
        padding: 60px 0;
    }

    .header-inner {
        height: 64px;
    }

    .logo-text h1,
    .logo-text h3 {
        font-size: 17px;
    }

    .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        width: 100%;
        background: var(--paper);
        border-bottom: 1px solid var(--line);
        transform: translateY(-120%);
        transition: var(--transition);
        z-index: 999;
    }

    .main-nav.open {
        transform: translateY(0);
    }

    .main-nav ul {
        flex-direction: column;
        padding: 20px;
    }

    .main-nav a {
        padding: 14px 0;
        border-bottom: 1px solid var(--line-soft);
    }

    .lang-switch-item {
        margin-left: 0;
        margin-top: 12px;
    }

    .lang-switch {
        display: inline-flex !important;
        padding: 8px 20px !important;
        font-size: 0.9rem !important;
    }

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

    .hero-banner {
        min-height: 500px;
        margin-top: 64px;
    }

    .banner-content h2 {
        font-size: 30px;
    }

    .banner-content p {
        font-size: 14px;
    }

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

    .banner-mag-desc {
        font-size: 14px;
    }

    .banner-products-layout {
        gap: 36px;
    }

    .banner-years-layout,
    .banner-service-layout {
        gap: 36px;
    }

    .years-number {
        font-size: 90px;
    }

    .years-suffix {
        padding-top: 12px;
    }

    .stat-big {
        font-size: 36px;
    }

    .service-promise-badge {
        padding: 14px 20px;
    }

    .promise-badge-num {
        font-size: 26px;
    }

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

    .chain-num {
        font-size: 26px;
    }

    .chain-name {
        font-size: 15px;
    }

    .banner-arrow {
        display: none;
    }

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

    .intro-features {
        grid-template-columns: 1fr;
    }

    .products-grid,
    .products-grid-8 {
        grid-template-columns: 1fr;
    }

    .scenario-card {
        flex: 0 0 190px;
        height: 150px;
    }

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

    .stat-item {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        padding-bottom: 30px;
    }

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

    .culture-grid,
    .team-grid,
    .honors-grid {
        grid-template-columns: 1fr;
    }

    .applications-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .product-layout {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .product-sidebar {
        position: static;
        border-radius: 12px;
        margin-bottom: 32px;
    }

    .product-nav-item .product-nav-sub {
        max-height: 0;
    }

    .product-nav-item.active .product-nav-sub,
    .product-nav-item.expanded .product-nav-sub {
        max-height: 300px;
    }

    /* 移动端导航下拉菜单 */
    .has-dropdown .nav-dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        border: none;
        border-top: 1px solid var(--line);
        box-shadow: none;
        background: var(--paper);
        display: none;
    }

    .has-dropdown.open .nav-dropdown {
        display: block;
    }

    .nav-dropdown-arrow {
        display: inline;
    }

    .subcategory-image {
        height: 150px;
    }

    .featured-product {
        grid-template-columns: 1fr;
        padding: 24px;
    }

    .featured-product-image {
        height: 200px;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .page-banner {
        height: 240px;
    }

    .page-banner h2 {
        font-size: 32px;
    }

    .contact-info-panel {
        padding: 36px 28px;
    }

    .warehouse-grid {
        grid-template-columns: 1fr;
    }

    .warehouse-card {
        flex-direction: column;
        padding: 20px;
    }

    .warehouse-card-left {
        gap: 12px;
    }

    .warehouse-card-visual {
        width: 100%;
        margin: 16px -20px -20px -20px;
        border-left: none;
        border-top: 1px solid var(--line-soft);
        padding: 12px 0;
    }

    .warehouse-card-visual img {
        max-width: 320px;
        max-height: 220px;
        margin: 0 auto;
    }

    .location-links {
        justify-content: center;
    }

    .cta-content h2 {
        font-size: 28px;
    }

    /* S型时间轴移动端折叠为单列 */
    .timeline::before {
        left: 0;
        transform: none;
    }

    .timeline-item,
    .timeline-item:nth-child(even) {
        width: 100%;
        left: 0;
        text-align: left;
        padding: 0 0 28px 36px;
    }

    .timeline-item::before {
        right: auto;
        left: -7px;
    }

    .timeline-item::after {
        display: none;
    }

    .timeline-year {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 20px;
    }

    .banner-content h2 {
        font-size: 24px;
    }

    .banner-btns {
        flex-direction: column;
    }

    .banner-btns .btn {
        width: 100%;
    }

    .scenario-card {
        flex: 0 0 160px;
        height: 130px;
        margin-right: 14px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

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

    .subcategory-grid,
    .subcategory-grid--7 {
        grid-template-columns: 1fr;
    }

    .category-group-header {
        flex-wrap: wrap;
    }

    .category-group-header p {
        margin-left: 0;
        width: 100%;
    }

    .product-filter {
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
    }

    .filter-btn {
        white-space: nowrap;
        padding: 12px 18px;
    }
}