/* 
  海悦虾滑 - 设计系统 
  基于 hisugar.com 风格仿写
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;800&family=Noto+Sans+SC:wght@300;500;700&display=swap');

:root {
    --primary-color: #E60012; 
    --primary-hover: #C50010;
    --primary-light: #FFF0F0;
    --text-dark: #333333;
    --text-gray: #666666;
    --text-light: #999999;
    --bg-light: #F8F9FA;
    --bg-white: #FFFFFF;
    --border-color: #EEEEEE;
    --footer-bg: #1a1a1a;
    --footer-bottom-bg: #111111;
    
    --section-padding: 80px 0;
    --container-width: 1200px;
    --transition-fast: 0.3s ease;
    --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-white);
    overflow-x: hidden;
    font-size: 14px;
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* 按钮基础样式 */
.btn {
    display: inline-block;
    padding: 10px 28px;
    border-radius: 4px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: center;
    border: none;
    font-size: 14px;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(230, 0, 18, 0.3);
}

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

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

.btn-outline-light {
    border: 1px solid rgba(255,255,255,0.8);
    color: white;
    background: transparent;
}

.btn-outline-light:hover {
    background-color: white;
    color: var(--text-dark);
}

.btn-sm {
    padding: 6px 18px;
    font-size: 13px;
}

/* 标题基础样式 */
h1, h2, h3, h4 {
    line-height: 1.3;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-title h2 {
    font-size: 32px;
    margin-bottom: 10px;
    position: relative;
    padding-bottom: 12px;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background-color: var(--primary-color);
}

.section-title p {
    color: var(--text-gray);
    font-size: 15px;
}

/* ===== 导航栏 ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    z-index: 1000;
    background-color: transparent;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
}

header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    height: 60px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-text {
    font-size: 33px;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: 1px;
}

.brand-name {
    font-size: 28px;
    font-weight: 700;
    color: white;
    border-left: 2px solid var(--primary-color);
    padding-left: 8px;
}

header.scrolled .brand-name {
    color: var(--text-dark);
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

/* 二级导航基础结构：参考泛糖官网的大白色面板，一级项负责定位。 */
.nav-item {
    position: relative;
}

.nav-item > a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding-right: 14px;
}

.nav-links a {
    font-weight: 500;
    color: white;
    font-size: 18px;
    position: relative;
    padding: 5px 0;
}

header.scrolled .nav-links a {
    color: var(--text-dark);
}

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

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

.sub-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    display: grid;
    grid-template-columns: repeat(4, minmax(140px, 1fr));
    gap: 40px;
    width: min(1000px, calc(100vw - 80px));
    min-height: 270px;
    padding: 32px 48px;
    border-radius: 0;
    border: 1px solid rgba(43, 155, 188, 0.12);
    /* 二级导航海鲜冷链背景图：去掉白色遮罩，直接展示背景素材。 */
    background-color: rgba(232, 248, 252, 0.42);
    background-image: url('assets/subnav-sea-coldchain-bg-20260426.png');
    background-size: auto 138%;
    background-position: right bottom;
    box-shadow: 0 14px 34px rgba(14, 73, 92, 0.12);
    transform: translate(-50%, 8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: var(--transition-fast);
    z-index: 1100;
}

.sub-nav::before {
    content: '';
    position: absolute;
    top: -12px;
    left: 0;
    width: 100%;
    height: 12px;
}

.sub-nav::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), rgba(43, 155, 188, 0.24), transparent);
}

.nav-item:hover .sub-nav,
.nav-item:focus-within .sub-nav {
    transform: translate(-50%, 0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.sub-nav-col {
    position: relative;
    z-index: 1;
}

.sub-nav-title {
    display: block;
    margin-bottom: 10px;
    color: var(--text-dark);
    font-size: 17px;
    font-weight: 700;
    line-height: 1.5;
}

.sub-nav a {
    display: block;
    width: fit-content;
    padding: 5px 0;
    border-radius: 0;
    color: var(--text-dark);
    font-size: 15px;
    font-weight: 400;
    line-height: 1.8;
    white-space: nowrap;
    transition: var(--transition-fast);
}

header.scrolled .sub-nav a,
.sub-nav a {
    color: var(--text-dark);
}

.sub-nav a::after {
    display: none;
}

.sub-nav a:hover,
.sub-nav a:focus {
    color: var(--primary-color);
    outline: none;
}

.sub-nav a:focus-visible {
    outline: 2px solid rgba(230, 0, 18, 0.32);
    outline-offset: 3px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box input {
    width: 160px;
    padding: 6px 30px 6px 12px;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 20px;
    background: rgba(255,255,255,0.1);
    color: white;
    font-size: 13px;
    outline: none;
    transition: var(--transition-fast);
}

.search-box input::placeholder {
    color: rgba(255,255,255,0.7);
}

header.scrolled .search-box input {
    border-color: var(--border-color);
    background: var(--bg-light);
    color: var(--text-dark);
}

header.scrolled .search-box input::placeholder {
    color: var(--text-light);
}

.search-box i {
    position: absolute;
    right: 10px;
    color: rgba(255,255,255,0.7);
    font-size: 12px;
}

header.scrolled .search-box i {
    color: var(--text-light);
}

.mobile-toggle {
    display: none;
    font-size: 20px;
    color: white;
    cursor: pointer;
}

header.scrolled .mobile-toggle {
    color: var(--text-dark);
}

/* ===== 英雄轮播 ===== */
.hero {
    height: 100vh;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.carousel {
    height: 100%;
    width: 100%;
    position: relative;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    color: white;
    opacity: 0;
    transition: opacity 0.8s ease;
    z-index: 1;
}

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

.slide-content {
    position: relative;
    z-index: 25;
    transform: translateY(clamp(-110px, -8vh, -64px));
}

.slide-content h1 {
    font-size: 82px;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.1;
    letter-spacing: 0;
}

.slide-content h1 span {
    color: var(--primary-color);
    background: linear-gradient(90deg, var(--primary-color), #ff4d4d);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.slide-content p {
    font-size: 22px;
    margin-bottom: 40px;
    max-width: 650px;
    opacity: 0.95;
    line-height: 1.6;
}

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

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

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

.dot.active {
    background: var(--primary-color);
    width: 28px;
    border-radius: 5px;
}

.carousel-arrows {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 30px;
    z-index: 10;
    pointer-events: none;
}

.arrow {
    width: 50px;
    height: 50px;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(4px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
    pointer-events: auto;
    color: white;
    font-size: 18px;
}

.arrow:hover {
    background: var(--primary-color);
    transform: scale(1.1);
}

/* ===== 门户数据看板 (Portal Dashboard) ===== */
.hero-dashboard {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 1100px;
    z-index: 20;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    padding: 0 20px;
}

.hero-dashboard.reveal-text,
.hero-dashboard.reveal-text.active {
    transform: translateX(-50%);
}

.glass-panel {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    padding: 20px;
    color: white;
    transition: var(--transition-fast);
}

.glass-panel:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-5px);
}

.panel-label {
    font-size: 13px;
    opacity: 0.7;
    margin-bottom: 8px;
    display: block;
    letter-spacing: 1px;
}

.panel-value {
    font-size: 28px;
    font-weight: 800;
    font-family: 'Inter', sans-serif;
}

.panel-trend {
    font-size: 12px;
    margin-left: 8px;
}

.trend-up { color: #00ff88; }
.trend-down { color: #ff4d4d; }

.portal-hint {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255,255,255,0.5);
    font-size: 12px;
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 10px;
}

.portal-hint span {
    width: 40px;
    height: 1px;
    background: rgba(255,255,255,0.3);
}

/* ===== 实力数据条 ===== */
.stats-bar {
    background-color: var(--primary-color);
    color: white;
    padding: 40px 0;
}

.stats-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    text-align: center;
    gap: 20px;
}

.stat-num {
    font-size: 42px;
    font-weight: 800;
}

.unit {
    font-size: 16px;
    margin-left: 4px;
}

.stat-item p {
    font-size: 14px;
    opacity: 0.85;
    margin-top: 4px;
}

/* ===== 产业工作台 ===== */
.portal-workbench {
    padding: 70px 0;
    background: var(--bg-white);
}

.workbench-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 24px;
    margin-bottom: 28px;
}

.workbench-head h2 {
    font-size: 32px;
}

.workbench-link {
    color: var(--primary-color);
    font-weight: 700;
    white-space: nowrap;
}

.workbench-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
}

.portal-card {
    min-height: 150px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px 16px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition-fast);
}

.portal-card i {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    margin-bottom: 18px;
}

.portal-card strong {
    font-size: 16px;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.portal-card span {
    color: var(--text-gray);
    font-size: 13px;
    line-height: 1.5;
}

.portal-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-6px);
    box-shadow: 0 16px 34px rgba(230, 0, 18, 0.1);
}

.notice-strip {
    margin-top: 22px;
    min-height: 48px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 16px;
    padding: 0 18px;
    background: var(--bg-light);
}

.notice-label {
    color: var(--primary-color);
    font-weight: 800;
}

.notice-window {
    height: 48px;
    overflow: hidden;
}

.notice-window ul {
    transition: transform var(--transition-fast);
}

.notice-window li {
    height: 48px;
    display: flex;
    align-items: center;
    color: var(--text-gray);
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.notice-strip a {
    color: var(--text-light);
    font-size: 13px;
    white-space: nowrap;
}

.notice-strip a:hover {
    color: var(--primary-color);
}

/* ===== 资讯 & 研究板块 ===== */
.news-section,
.research-section {
    padding: var(--section-padding);
    background-color: var(--bg-white);
}

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

.section-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.column-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
}

.title-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
}

.red-line {
    display: inline-block;
    width: 4px;
    height: 20px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.column-header h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
}

.more-link {
    font-size: 13px;
    color: var(--text-light);
}

.more-link:hover {
    color: var(--primary-color);
}

/* Tab 导航 */
.tab-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 16px;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.tab-link {
    font-size: 13px;
    color: var(--text-gray);
    padding: 4px 0;
    position: relative;
    white-space: nowrap;
}

.tab-link:hover {
    color: var(--primary-color);
}

.tab-link.active {
    color: var(--primary-color);
    font-weight: 600;
}

.tab-link.active::after {
    content: '';
    position: absolute;
    bottom: -11px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

/* Tab 内容 */
.tab-content {
    display: none;
    animation: fadeIn 0.4s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 新闻列表 */
.news-list li {
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px dashed var(--border-color);
    transition: var(--transition-fast);
}

.news-list li:hover {
    padding-left: 6px;
}

.news-list li:hover a {
    color: var(--primary-color);
}

.news-date {
    font-size: 13px;
    color: var(--text-light);
    white-space: nowrap;
    font-family: 'Inter', sans-serif;
}

.news-list a {
    font-size: 14px;
    color: var(--text-dark);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ===== 品牌动态页 ===== */
.news-feature {
    display: grid;
    grid-template-columns: 1fr 1.05fr;
    gap: 28px;
    align-items: center;
    padding: 22px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-white);
    margin-bottom: 26px;
}

.news-feature img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    border-radius: 8px;
}

.news-feature h2 {
    font-size: 28px;
    margin: 10px 0;
}

.news-feature p {
    color: var(--text-gray);
    font-size: 15px;
    margin-bottom: 20px;
}

.news-card-grid,
.review-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.news-card,
.review-grid article {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    background: white;
    transition: var(--transition-fast);
}

.news-card:hover,
.review-grid article:hover {
    transform: translateY(-5px);
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.08);
}

.news-card img,
.review-grid img {
    width: 100%;
    height: 170px;
    object-fit: cover;
}

.news-card div,
.review-grid article {
    padding: 18px;
}

.news-card h3,
.review-grid h3 {
    font-size: 17px;
    margin: 8px 0;
}

.news-card p,
.review-grid p {
    color: var(--text-gray);
    font-size: 14px;
}

.insight-list {
    display: grid;
    gap: 16px;
}

.insight-list article {
    border-left: 4px solid var(--primary-color);
    background: var(--bg-light);
    padding: 18px 20px;
    border-radius: 0 8px 8px 0;
}

.insight-list span {
    color: var(--primary-color);
    font-size: 12px;
    font-weight: 800;
}

.insight-list h3 {
    font-size: 18px;
    margin: 6px 0;
}

.insight-list p {
    color: var(--text-gray);
    font-size: 14px;
}

.market-panel {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 22px;
}

.market-panel div {
    background: var(--footer-bg);
    color: white;
    border-radius: 8px;
    padding: 22px;
}

.market-panel strong {
    display: block;
    font-size: 32px;
    line-height: 1;
}

.market-panel span {
    color: var(--primary-color);
    font-weight: 700;
}

.market-panel p {
    color: rgba(255,255,255,0.72);
    font-size: 13px;
    margin-top: 8px;
}

/* ===== 工具板块 ===== */
.tools-section {
    padding: var(--section-padding);
    background-color: var(--bg-white);
}

.tools-header {
    margin-bottom: 24px;
}

.tools-header .title-wrap h3 {
    font-size: 18px;
}

.tools-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.tools-form {
    padding: 30px;
    background: var(--bg-white);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 13px;
    color: var(--text-gray);
    font-weight: 500;
}

.form-group input,
.form-group select {
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    outline: none;
    transition: var(--transition-fast);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(230, 0, 18, 0.08);
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 10px;
}

.tools-result {
    background: var(--bg-light);
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    border-left: 1px solid var(--border-color);
}

.tools-result h4 {
    font-size: 16px;
    margin-bottom: 8px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
}

.result-label {
    color: var(--text-gray);
}

.result-value {
    font-weight: 700;
    color: var(--text-dark);
    font-size: 16px;
    font-family: 'Inter', sans-serif;
}

.result-item.highlight .result-value {
    color: var(--primary-color);
    font-size: 20px;
}

/* ===== 批次溯源查询交互区 ===== */
.trace-section {
    padding: var(--section-padding);
    background: var(--bg-white);
}

.trace-layout {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 44px;
    align-items: center;
}

.trace-media {
    position: relative;
}

.trace-media img {
    width: 100%;
    height: 430px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.14);
}

.trace-status {
    position: absolute;
    left: 20px;
    bottom: 20px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.92);
    border-radius: 6px;
    color: var(--primary-color);
    font-weight: 700;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.14);
}

.trace-panel h2 {
    font-size: 32px;
    margin: 10px 0 14px;
}

.trace-panel p {
    color: var(--text-gray);
    margin-bottom: 22px;
}

.trace-search {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 12px;
    margin-bottom: 14px;
}

.trace-search input {
    min-width: 0;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 11px 12px;
    font-family: inherit;
    font-size: 14px;
    outline: none;
    transition: var(--transition-fast);
}

.trace-search input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(230, 0, 18, 0.08);
}

.trace-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 18px;
}

.trace-presets button {
    border: 1px solid var(--border-color);
    background: white;
    color: var(--text-gray);
    border-radius: 30px;
    padding: 7px 14px;
    cursor: pointer;
    font-family: inherit;
    font-size: 13px;
    transition: var(--transition-fast);
}

.trace-presets button.active,
.trace-presets button:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: var(--primary-light);
}

.trace-result {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.trace-result div {
    padding: 16px;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition-fast);
}

.trace-result div.is-updated {
    border-color: var(--primary-color);
    box-shadow: 0 10px 24px rgba(230, 0, 18, 0.08);
}

.trace-result small {
    display: block;
    color: var(--text-gray);
    margin-bottom: 6px;
}

.trace-result strong {
    color: var(--text-dark);
    font-size: 18px;
}

/* ===== 产品搭配清单交互区 ===== */
.pairing-section {
    padding: var(--section-padding);
    background: linear-gradient(180deg, #ffffff 0%, #f8f9fa 100%);
}

.pairing-layout {
    display: grid;
    grid-template-columns: 0.85fr 1.15fr;
    gap: 42px;
    align-items: center;
}

.pairing-copy h2 {
    font-size: 32px;
    margin: 10px 0 14px;
}

.pairing-copy p {
    color: var(--text-gray);
    margin-bottom: 24px;
}

.pairing-options {
    display: grid;
    gap: 12px;
}

.pairing-option {
    border: 1px solid var(--border-color);
    background: white;
    border-radius: 8px;
    padding: 14px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    color: var(--text-dark);
    font-family: inherit;
    font-weight: 700;
    transition: var(--transition-fast);
}

.pairing-option i {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.pairing-option.active,
.pairing-option:hover {
    border-color: var(--primary-color);
    box-shadow: 0 12px 28px rgba(230, 0, 18, 0.1);
    transform: translateX(4px);
}

.pairing-board {
    display: grid;
    grid-template-columns: 1fr 0.86fr;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.08);
}

.pairing-photo {
    min-height: 420px;
}

.pairing-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.pairing-summary {
    padding: 28px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.pairing-summary > span {
    width: fit-content;
    padding: 5px 10px;
    background: var(--primary-light);
    color: var(--primary-color);
    border-radius: 30px;
    font-size: 12px;
    font-weight: 800;
}

.pairing-summary h3 {
    font-size: 24px;
    margin: 14px 0 12px;
}

.pairing-summary ul {
    display: grid;
    gap: 8px;
    margin-bottom: 18px;
    color: var(--text-gray);
}

.pairing-summary li::before {
    content: '✓';
    color: var(--primary-color);
    font-weight: 800;
    margin-right: 8px;
}

.pairing-metrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 18px;
}

.pairing-metrics div {
    background: var(--bg-light);
    border-radius: 8px;
    padding: 12px;
}

.pairing-metrics small {
    display: block;
    color: var(--text-gray);
    margin-bottom: 4px;
}

.pairing-metrics strong {
    color: var(--primary-color);
    font-size: 22px;
}

.pairing-feedback {
    margin-top: 12px;
    color: var(--text-gray);
    font-size: 13px;
}

.pairing-feedback.is-added {
    color: var(--primary-color);
    font-weight: 700;
}

/* ===== 品牌素材图库 ===== */
.asset-gallery-section {
    padding: var(--section-padding);
    background: var(--bg-white);
}

.asset-gallery {
    display: grid;
    grid-template-columns: 1.5fr 0.75fr;
    gap: 24px;
    align-items: stretch;
}

.asset-viewer {
    position: relative;
    min-height: 460px;
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-light);
}

.asset-viewer img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.asset-caption {
    position: absolute;
    left: 22px;
    bottom: 22px;
    max-width: calc(100% - 44px);
    background: rgba(255, 255, 255, 0.93);
    border-radius: 8px;
    padding: 14px 18px;
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.16);
}

.asset-caption span {
    display: block;
    color: var(--primary-color);
    font-size: 12px;
    font-weight: 800;
    margin-bottom: 4px;
}

.asset-caption strong {
    font-size: 20px;
}

.asset-thumbs {
    display: grid;
    gap: 14px;
}

.asset-thumb {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 14px;
    align-items: center;
    border: 1px solid var(--border-color);
    background: white;
    border-radius: 8px;
    padding: 10px;
    cursor: pointer;
    text-align: left;
    font-family: inherit;
    font-weight: 700;
    color: var(--text-dark);
    transition: var(--transition-fast);
}

.asset-thumb img {
    width: 120px;
    height: 84px;
    border-radius: 6px;
    object-fit: cover;
}

.asset-thumb.active,
.asset-thumb:hover {
    border-color: var(--primary-color);
    box-shadow: 0 12px 26px rgba(230, 0, 18, 0.08);
    transform: translateY(-2px);
}

/* ===== 北海鲜虾溯源交互区 ===== */
.origin-experience {
    padding: var(--section-padding);
    background: linear-gradient(180deg, #ffffff 0%, #f3faf9 100%);
}

.origin-layout {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 52px;
    align-items: center;
}

.origin-copy h2 {
    font-size: 34px;
    margin-bottom: 16px;
}

.origin-copy p {
    color: var(--text-gray);
    font-size: 15px;
    margin-bottom: 28px;
}

.origin-steps {
    display: grid;
    gap: 12px;
}

.origin-step {
    width: 100%;
    border: 1px solid var(--border-color);
    background: white;
    border-radius: 8px;
    padding: 14px 16px;
    display: flex;
    align-items: center;
    gap: 14px;
    cursor: pointer;
    text-align: left;
    transition: var(--transition-fast);
    font-family: inherit;
}

.origin-step span {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 12px;
}

.origin-step strong {
    font-size: 15px;
    color: var(--text-dark);
}

.origin-step.active,
.origin-step:hover {
    border-color: var(--primary-color);
    box-shadow: 0 12px 28px rgba(230, 0, 18, 0.1);
    transform: translateX(4px);
}

.origin-step.active span {
    background: var(--primary-color);
    color: white;
}

.origin-visual {
    position: relative;
    min-height: 430px;
}

.origin-visual img {
    width: 100%;
    height: 430px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.14);
}

.origin-card {
    position: absolute;
    left: 24px !important;
    right: auto !important;
    top: 24px;
    bottom: auto;
    width: min(300px, calc(100% - 48px));
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: 8px;
    padding: 18px;
    box-shadow: 0 18px 38px rgba(0, 0, 0, 0.16);
}

.origin-visual .origin-card {
    left: 24px !important;
    right: auto !important;
}

.origin-card > span {
    color: var(--primary-color);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 1px;
}

.origin-card h3 {
    font-size: 19px;
    margin: 8px 0;
}

.origin-card p {
    color: var(--text-gray);
    font-size: 13px;
    margin-bottom: 14px;
}

.origin-metrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.origin-metrics div {
    background: var(--bg-light);
    border-radius: 8px;
    padding: 12px;
}

.origin-metrics strong {
    display: block;
    color: var(--primary-color);
    font-size: 21px;
    line-height: 1;
}

.origin-metrics small {
    color: var(--text-gray);
    font-size: 12px;
}

/* ===== 产品矩阵 ===== */
.products {
    padding: var(--section-padding);
    background-color: var(--bg-light);
}

.product-tabs {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
}

.tab-btn {
    padding: 8px 22px;
    border: none;
    background: white;
    border-radius: 30px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition-fast);
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    font-size: 14px;
    font-family: inherit;
}

.tab-btn.active, .tab-btn:hover {
    background-color: var(--primary-color);
    color: white;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}

.product-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    transition: var(--transition-slow);
    border: 1px solid var(--border-color);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 32px rgba(0,0,0,0.1);
}

.product-img {
    height: 180px;
    position: relative;
    overflow: hidden;
}

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

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

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(230, 0, 18, 0.75);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: var(--transition-fast);
}

.product-card:hover .overlay {
    opacity: 1;
}

.btn-view {
    background: transparent;
    color: white;
    border: 2px solid white;
    padding: 6px 18px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    font-family: inherit;
}

.product-info {
    padding: 20px;
}

.product-info h3 {
    font-size: 17px;
    margin-bottom: 6px;
}

.product-info p {
    color: var(--text-gray);
    font-size: 13px;
    margin-bottom: 14px;
    min-height: 42px;
}

.tag {
    display: inline-block;
    padding: 3px 10px;
    background-color: var(--primary-light);
    color: var(--primary-color);
    font-size: 12px;
    font-weight: 600;
    border-radius: 4px;
}

/* ===== 虾滑应用场景 ===== */
.scene-section {
    padding: var(--section-padding);
    background: var(--bg-white);
}

.scene-layout {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 52px;
    align-items: center;
}

.scene-media {
    position: relative;
}

.scene-media img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 22px 48px rgba(0, 0, 0, 0.14);
}

.scene-badge {
    position: absolute;
    left: 22px;
    bottom: 22px;
    min-width: 156px;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(12px);
    border-radius: 8px;
    padding: 16px;
    box-shadow: 0 14px 28px rgba(0, 0, 0, 0.16);
}

.scene-badge strong {
    display: block;
    color: var(--primary-color);
    font-size: 30px;
    line-height: 1;
}

.scene-badge span {
    color: var(--text-gray);
    font-size: 13px;
}

.scene-panel h2 {
    font-size: 34px;
    margin-bottom: 14px;
}

.scene-panel p {
    color: var(--text-gray);
    font-size: 15px;
    margin-bottom: 24px;
}

.scene-tabs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 22px;
}

.scene-tab {
    border: 1px solid var(--border-color);
    background: white;
    border-radius: 8px;
    padding: 13px 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-dark);
    font-family: inherit;
    font-weight: 700;
    transition: var(--transition-fast);
}

.scene-tab i {
    color: var(--primary-color);
}

.scene-tab.active,
.scene-tab:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.scene-tab.active i,
.scene-tab:hover i {
    color: white;
}

.scene-facts {
    display: grid;
    gap: 12px;
    margin-bottom: 26px;
}

.scene-facts div {
    border-left: 3px solid var(--primary-color);
    background: var(--bg-light);
    padding: 12px 14px;
}

.scene-facts small {
    display: block;
    color: var(--text-light);
    font-size: 12px;
    margin-bottom: 4px;
}

.scene-facts strong {
    color: var(--text-dark);
    font-size: 15px;
}

/* ===== 品牌特色 ===== */
.features {
    padding: var(--section-padding);
    background-color: var(--bg-white);
}

.feature-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.sub-title {
    color: var(--primary-color);
    font-weight: 700;
    letter-spacing: 2px;
    display: block;
    margin-bottom: 12px;
    font-size: 14px;
}

.feature-content h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

.feature-content > p {
    color: var(--text-gray);
    font-size: 15px;
    line-height: 1.8;
}

.feature-list {
    margin: 24px 0;
}

.feature-list li {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
    font-size: 15px;
}

.feature-list i {
    color: var(--primary-color);
    font-size: 18px;
}

/* ===== 品牌故事页 ===== */
.about-story {
    background: var(--bg-white);
}

.story-visual {
    position: relative;
}

.story-visual img,
.craft-image img {
    width: 100%;
    border-radius: 8px;
    object-fit: cover;
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.12);
}

.story-visual img {
    aspect-ratio: 4 / 3;
}

.story-stamp {
    position: absolute;
    right: 22px;
    bottom: 22px;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(12px);
    border-radius: 8px;
    padding: 18px 22px;
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.14);
}

.story-stamp strong {
    display: block;
    color: var(--primary-color);
    font-size: 36px;
    line-height: 1;
}

.story-stamp span {
    color: var(--text-gray);
    font-size: 13px;
}

.brand-values {
    padding: 56px 0;
    background: var(--bg-light);
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.value-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px 22px;
    transition: var(--transition-fast);
}

.value-card:hover {
    transform: translateY(-6px);
    border-color: var(--primary-color);
    box-shadow: 0 16px 32px rgba(230, 0, 18, 0.08);
}

.value-card i {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
}

.value-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
}

.value-card p {
    color: var(--text-gray);
    font-size: 14px;
}

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

.craft-layout {
    display: grid;
    grid-template-columns: 0.95fr 1.05fr;
    gap: 56px;
    align-items: center;
}

.craft-image img {
    aspect-ratio: 16 / 11;
}

.craft-content h2 {
    font-size: 32px;
    margin-bottom: 24px;
}

.craft-list {
    display: grid;
    gap: 16px;
}

.craft-list div {
    display: grid;
    grid-template-columns: 46px 1fr;
    gap: 0 16px;
    padding: 18px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-light);
}

.craft-list span {
    grid-row: span 2;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
}

.craft-list h4 {
    font-size: 17px;
    margin-bottom: 4px;
}

.craft-list p {
    color: var(--text-gray);
    font-size: 14px;
}

.image-stack {
    position: relative;
}

.image-stack img {
    border-radius: 8px;
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.exp-box {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--primary-color);
    color: white;
    padding: 24px;
    border-radius: 8px;
    text-align: center;
    min-width: 120px;
}

.exp-num {
    display: block;
    font-size: 42px;
    font-weight: 800;
    line-height: 1;
}

.exp-text {
    font-size: 13px;
    opacity: 0.9;
}

/* ===== 页脚 ===== */
.footer {
    background-color: var(--footer-bg);
    color: white;
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}

.footer h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: white;
}

.footer h4 {
    font-size: 15px;
    margin-bottom: 18px;
    color: rgba(255,255,255,0.9);
}

.footer-info p {
    font-size: 13px;
    color: rgba(255,255,255,0.6);
    margin-bottom: 8px;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    font-size: 13px;
    color: rgba(255,255,255,0.6);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 4px;
}

.footer-qr {
    display: flex;
    justify-content: flex-end;
}

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

.qr-placeholder {
    width: 90px;
    height: 90px;
    background: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 40px;
    margin-bottom: 8px;
}

.qr-box p {
    font-size: 12px;
    color: rgba(255,255,255,0.7);
}

.footer-bottom {
    background-color: var(--footer-bottom-bg);
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}

/* ===== 侧边栏 ===== */
.sidebar-tools {
    position: fixed;
    right: 16px;
    bottom: 50px;
    z-index: 999;
}

.tool-item {
    width: 48px;
    height: 48px;
    background: white;
    margin-bottom: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    color: var(--text-gray);
    font-size: 18px;
}

.tool-item:hover {
    background: var(--primary-color);
    color: white;
}

.tool-tip {
    position: absolute;
    right: 58px;
    background: #333;
    color: white;
    padding: 5px 12px;
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
}

.tool-item:hover .tool-tip {
    opacity: 1;
    visibility: visible;
}

.qr-trigger {
    position: relative;
}

.qr-float {
    position: absolute;
    right: 58px;
    bottom: 0;
    width: 120px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
    padding: 12px;
    text-align: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
}

.qr-float i {
    font-size: 48px;
    color: #07C160;
}

.qr-float p {
    font-size: 12px;
    color: var(--text-gray);
    margin-top: 6px;
}

.qr-trigger:hover .qr-float {
    opacity: 1;
    visibility: visible;
}

.scroll-top {
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

/* ===== 动效类 ===== */
.reveal-text {
    opacity: 0;
    transform: translateY(24px);
    transition: var(--transition-slow);
}

.reveal-text.active {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }

.reveal-item {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-slow);
}

.reveal-item.active {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式适配 ===== */
@media (max-width: 992px) {
    .section-columns,
    .feature-grid,
    .craft-layout,
    .news-feature,
    .scene-layout,
    .origin-layout,
    .trace-layout,
    .pairing-layout,
    .asset-gallery {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .pairing-board {
        grid-template-columns: 1fr;
    }

    .pairing-photo {
        min-height: 340px;
    }

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

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

    .value-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tools-layout {
        grid-template-columns: 1fr;
    }
    
    .tools-result {
        border-left: none;
        border-top: 1px solid var(--border-color);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .slide-content h1 {
        font-size: 42px;
    }
    
    .stats-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        align-items: stretch;
        padding: 20px;
        gap: 0;
        box-shadow: 0 5px 20px rgba(0,0,0,0.1);
        transform: translateY(-150%);
        opacity: 0;
        transition: var(--transition-fast);
        pointer-events: none;
        max-height: calc(100vh - 60px);
        overflow-y: auto;
    }
    
    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    
    .nav-item {
        width: 100%;
    }

    .nav-item > a {
        display: flex;
        width: 100%;
        min-height: 48px;
    }

    .nav-links a {
        color: var(--text-dark);
        padding: 12px 0;
        border-bottom: 1px solid var(--border-color);
    }

    /* 移动端没有悬停态，二级导航默认收起，由 JS 给当前项加 open 后展开。 */
    .sub-nav {
        position: static;
        display: grid;
        grid-template-columns: 1fr;
        gap: 8px;
        min-width: 0;
        width: 100%;
        min-height: 0;
        max-height: 0;
        margin: 0;
        padding: 0 10px;
        border: 1px solid rgba(43, 155, 188, 0.1);
        border-radius: 6px;
        /* 移动端同样去掉白色遮罩，直接使用二级导航背景素材。 */
        background-color: rgba(232, 248, 252, 0.42);
        background-image: url('assets/subnav-sea-coldchain-bg-20260426.png');
        background-size: auto 138%;
        background-position: right bottom;
        box-shadow: none;
        transform: none;
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        overflow: hidden;
    }

    .sub-nav::before {
        display: none;
    }

    .sub-nav::after {
        display: none;
    }

    .nav-item:hover .sub-nav,
    .nav-item:focus-within .sub-nav {
        transform: none;
        max-height: 0;
        margin: 0;
        padding: 0 10px;
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
    }

    .nav-item.open .sub-nav {
        transform: none;
        max-height: 720px;
        margin: 0 0 10px;
        padding: 10px;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .sub-nav-col {
        padding: 10px 12px;
        border-radius: 4px;
        border: 1px solid rgba(43, 155, 188, 0.08);
    }

    .sub-nav-title {
        margin-bottom: 4px;
        font-size: 14px;
    }

    .sub-nav a {
        min-height: 34px;
        padding: 6px 0;
        border-bottom: none;
        font-size: 13px;
        white-space: normal;
    }
    
    .mobile-toggle {
        display: block;
    }
    
    .search-box {
        display: none;
    }

    .workbench-head {
        align-items: flex-start;
        flex-direction: column;
    }

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

    .notice-strip {
        grid-template-columns: 1fr;
        gap: 4px;
        padding: 12px 14px;
    }

    .notice-window {
        width: 100%;
    }

    .news-card-grid,
    .review-grid,
    .market-panel {
        grid-template-columns: 1fr;
    }

    .news-feature {
        padding: 16px;
    }

    .news-feature h2 {
        font-size: 24px;
    }
    
    .slide-content h1 {
        font-size: 32px;
        letter-spacing: 0;
    }

    .slide-content {
        transform: translateY(-72px);
    }
    
    .slide-content p {
        font-size: 15px;
        max-width: 92%;
    }
    
    .hero-btns {
        flex-direction: column;
        gap: 10px;
        max-width: 220px;
    }

    .hero-dashboard {
        bottom: 76px;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
        padding: 0 20px;
        max-width: 390px;
    }

    .hero-dashboard .glass-panel {
        padding: 12px;
        border-radius: 8px;
    }

    .panel-label {
        font-size: 11px;
        letter-spacing: 0;
        margin-bottom: 4px;
    }

    .panel-value {
        font-size: 22px;
    }

    .panel-trend {
        display: block;
        margin-left: 0;
        margin-top: 2px;
    }

    .portal-hint {
        display: none;
    }

    .carousel-dots {
        display: none;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }

    .origin-copy h2 {
        font-size: 28px;
    }

    .trace-panel h2,
    .pairing-copy h2 {
        font-size: 28px;
    }

    .trace-search {
        grid-template-columns: 1fr;
    }

    .trace-result,
    .pairing-metrics {
        grid-template-columns: 1fr;
    }

    .asset-viewer {
        min-height: 340px;
    }

    .asset-thumb {
        grid-template-columns: 96px 1fr;
    }

    .asset-thumb img {
        width: 96px;
        height: 68px;
    }

    .scene-panel h2 {
        font-size: 28px;
    }

    .scene-layout {
        gap: 28px;
    }

    .origin-visual,
    .origin-visual img {
        min-height: auto;
        height: 360px;
    }

    .origin-card {
        position: relative;
        right: auto;
        bottom: auto;
        width: 100%;
        margin-top: -72px;
    }
    
    .carousel-arrows {
        display: none;
    }
}

@media (max-width: 576px) {
    .stats-content {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }

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

    .portal-card {
        min-height: 118px;
    }
    
    .stat-num {
        font-size: 32px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-qr {
        justify-content: flex-start;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }

    .origin-visual img {
        height: 300px;
    }

    .trace-media img {
        height: 300px;
    }

    .pairing-photo {
        min-height: 260px;
    }

    .pairing-summary {
        padding: 22px;
    }

    .asset-viewer {
        min-height: 300px;
    }

    .asset-thumbs {
        gap: 10px;
    }

    .origin-card {
        padding: 18px;
    }

    .origin-metrics {
        grid-template-columns: 1fr;
    }

    .scene-tabs {
        grid-template-columns: 1fr;
    }

    .scene-badge {
        left: 14px;
        bottom: 14px;
    }
    
    .feature-content h2 {
        font-size: 26px;
    }

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

    .craft-content h2 {
        font-size: 26px;
    }

    .craft-list div {
        grid-template-columns: 1fr;
    }

    .craft-list span {
        grid-row: auto;
        margin-bottom: 12px;
    }

    .story-stamp {
        right: 12px;
        bottom: 12px;
    }
    
    .exp-box {
        right: 10px;
        bottom: -10px;
        padding: 16px;
    }
    
    .exp-num {
        font-size: 32px;
    }
    
    .tab-nav {
        gap: 4px 10px;
    }
    
    .tab-link {
        font-size: 12px;
    }
    
    .news-list a {
        white-space: normal;
        line-height: 1.5;
    }
    
    .news-list li {
        flex-direction: column;
        gap: 4px;
        align-items: flex-start;
    }
}

/* ===== 子页面公用组件 ===== */
.subpage-header {
    height: 350px;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    position: relative;
    color: white;
}

.subpage-header::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.6);
}

.subpage-header .container {
    position: relative;
    z-index: 2;
}

.subpage-header h1 {
    font-size: 52px;
    font-weight: 800;
    margin-bottom: 10px;
}

.breadcrumb {
    padding: 15px 0;
    background: var(--bg-light);
    font-size: 13px;
    color: var(--text-light);
}

.breadcrumb a {
    color: var(--text-gray);
}

.breadcrumb a:hover {
    color: var(--primary-color);
}

.breadcrumb span {
    margin: 0 8px;
}

.breadcrumb .current {
    color: var(--primary-color);
    font-weight: 600;
}

/* 侧边栏布局 */
.sidebar-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 50px;
    padding: 60px 0;
}

.sidebar-nav h3 {
    font-size: 18px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
}

.side-menu li {
    margin-bottom: 2px;
}

.side-menu a {
    display: block;
    padding: 12px 20px;
    background: var(--bg-light);
    border-radius: 4px;
    font-weight: 500;
    color: var(--text-gray);
}

.side-menu a:hover,
.side-menu a.active {
    background: var(--primary-color);
    color: white;
}

/* 纵向时间轴 (Timeline) */
.timeline-container {
    position: relative;
    padding: 80px 0;
    background: #111; /* 深色背景 */
    color: white;
}

.timeline-axis {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--primary-color);
    transform: translateX(-50%);
}

.timeline-item {
    width: 50%;
    padding: 20px 40px;
    position: relative;
    margin-bottom: 60px;
}

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

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

.timeline-dot {
    position: absolute;
    top: 30px;
    width: 16px;
    height: 16px;
    background: white;
    border: 4px solid var(--primary-color);
    border-radius: 50%;
    z-index: 5;
    transition: var(--transition-fast);
}

.timeline-item:hover .timeline-dot {
    transform: scale(1.5);
    box-shadow: 0 0 15px var(--primary-color);
}

.timeline-item:nth-child(even) .timeline-dot { left: -8px; }
.timeline-item:nth-child(odd) .timeline-dot { right: -8px; }

.timeline-date {
    font-size: 42px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 10px;
    display: block;
    font-family: 'Inter', sans-serif;
}

.timeline-content {
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.1);
    transition: var(--transition-fast);
}

.timeline-item:hover .timeline-content {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.3);
}

.timeline-content h4 {
    font-size: 22px;
    margin-bottom: 12px;
    color: white;
}

.timeline-content p {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
}

/* 伸缩搜索栏动画适配 */
header .search-box input {
    width: 0;
    padding: 6px 0;
    opacity: 0;
    visibility: hidden;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 20px;
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    color: white;
}

header.scrolled .search-box input {
    background: var(--bg-light);
    border-color: var(--border-color);
    color: var(--text-dark);
}

header .search-box.open input {
    width: 220px;
    padding: 6px 35px 6px 15px;
    opacity: 1;
    visibility: visible;
}

header .search-box i {
    cursor: pointer;
    z-index: 5;
}

@media (max-width: 992px) {
    .sidebar-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .timeline-axis {
        left: 20px;
    }
    
    .timeline-item {
        width: 100%;
        left: 0 !important;
        padding-left: 50px;
        text-align: left !important;
        margin-bottom: 40px;
    }
    
    .timeline-item .timeline-dot {
        left: 12px !important;
    }
    
    .timeline-date {
        font-size: 32px;
    }
}

/* ===== 弹窗系统 (Modal System) ===== */
.modal {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: none;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal.open { display: flex; animation: fadeIn 0.3s ease; }

.modal-content {
    max-width: 900px;
    width: 100%;
    position: relative;
    padding: 40px;
    border-radius: 20px;
}

.close-modal {
    position: absolute;
    top: 20px; right: 20px;
    font-size: 30px;
    color: white;
    cursor: pointer;
}

.modal-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.modal-img img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.modal-info h2 {
    font-size: 32px;
    margin-bottom: 10px;
    color: white;
}

.modal-info p {
    color: rgba(255,255,255,0.8);
    margin: 20px 0;
    font-size: 16px;
}

.modal-stats {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.m-stat {
    background: rgba(255,255,255,0.1);
    padding: 15px;
    border-radius: 8px;
    flex: 1;
}

.m-label {
    display: block;
    font-size: 12px;
    opacity: 0.6;
    margin-bottom: 5px;
}

.m-value {
    font-size: 18px;
    font-weight: 700;
}

/* 溯源页小动效 */
.stats-mini {
    display: flex;
    gap: 30px;
    margin-top: 30px;
}

.stats-mini .stat-item {
    text-align: left;
}

@media (max-width: 768px) {
    .modal-body {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .modal-stats {
        flex-direction: column;
    }
}