/* ============================================
   RUNKA 润卡水性漆 — 企业级官网
   大企业规范 · 涂料行业气质 · 交互动画
   ============================================ */

:root {
    --forest: #1a3329;
    --sage: #6b8f71;
    --moss: #4a6b52;
    --aqua: #4a9b8a;
    --terracotta: #c47b5b;
    --ink: #2c3e50;
    --cream: #faf8f5;
    --sand: #e8e2d9;
    --charcoal: #1e1e1e;
    --stone: #5c5c5c;
    --white: #ffffff;
    /* 宽屏 + 渐变色彩系统 */
    --gradient-hero: linear-gradient(135deg, #1a3329 0%, #2a4a3a 30%, #3a6b5a 60%, #2d5a4a 100%);
    --gradient-water: linear-gradient(180deg, rgba(74,155,138,0.15) 0%, transparent 50%, rgba(107,143,113,0.1) 100%);
    --gradient-soft: linear-gradient(135deg, #faf8f5 0%, #f0f5f0 50%, #faf8f5 100%);
    --gradient-accent: linear-gradient(135deg, rgba(196,123,91,0.9) 0%, rgba(180,100,70,0.9) 100%);
    --gradient-card: linear-gradient(180deg, rgba(255,255,255,0.95) 0%, rgba(250,248,245,0.98) 100%);
    --gradient-eco: linear-gradient(135deg, #2a4a3a 0%, #4a6b52 50%, #3a5a4a 100%);
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 8rem;
    --container: min(94vw, 1600px);
    --radius: 8px;
    --radius-lg: 16px;
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --transition: 0.35s var(--ease);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Outfit', -apple-system, sans-serif;
    font-weight: 400;
    font-size: 17px;
    line-height: 1.7;
    color: var(--charcoal);
    background: var(--cream);
    overflow-x: hidden;
    /* 中文排版：减少单字成行，避免不当断行 */
    word-break: keep-all;
    overflow-wrap: break-word;
}

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    min-width: 0;
}

/* ========== 顶部栏 ========== */
.topbar {
    background: var(--forest);
    color: rgba(255,255,255,0.9);
    font-size: 0.8rem;
    padding: 0.4rem 0;
}

.topbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar-phone {
    color: var(--terracotta);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition);
}

.topbar-phone:hover { color: var(--white); }

/* ========== 主导航 - 对齐 + 下拉 ========== */
.nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(250,248,245,0.96);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(26,51,41,0.08);
    transition: box-shadow var(--transition);
}

.nav.scrolled { box-shadow: 0 4px 24px rgba(26,51,41,0.06); }

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) 0;
}

.logo {
    text-decoration: none;
    color: var(--forest);
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.logo-img { height: 36px; width: auto; }

.logo-fallback {
    display: none;
    flex-direction: column;
    gap: 0;
}

.logo-text {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: 0.18em;
}

.logo-sub {
    font-size: 0.65rem;
    font-weight: 400;
    letter-spacing: 0.22em;
    opacity: 0.85;
}

/* 导航链接 - 居中对齐，统一间距 */
.nav-links {
    display: flex;
    list-style: none;
    gap: 0;
    align-items: center;
    margin: 0 auto;
    flex-wrap: nowrap;
}

.nav-links > li {
    position: relative;
}

.nav-links > li > a {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: var(--space-sm) 1rem;
    text-decoration: none;
    color: var(--charcoal);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    transition: color var(--transition);
}

.nav-links > li > a:hover,
.nav-links > li.has-dropdown:hover > a {
    color: var(--terracotta);
}

.nav-links .arrow {
    font-size: 0.5rem;
    opacity: 0.7;
    transition: transform var(--transition);
}

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

.nav-lang {
    color: var(--sage) !important;
    font-size: 0.8rem !important;
}

/* 下拉菜单 */
.dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 180px;
    padding: var(--space-sm) 0;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: 0 12px 40px rgba(26,51,41,0.12);
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), visibility 0.25s;
}

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

.dropdown li {
    border: none;
}

.dropdown a {
    display: block;
    padding: 0.6rem var(--space-md);
    font-size: 0.85rem;
    color: var(--stone);
    text-decoration: none;
    transition: all var(--transition);
}

.dropdown a:hover {
    color: var(--terracotta);
    background: rgba(196,123,91,0.06);
    padding-left: calc(var(--space-md) + 4px);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--forest);
    transition: var(--transition);
}

.nav-toggle:hover span { background: var(--terracotta); }

/* ========== Hero ========== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    padding: var(--space-3xl) var(--space-lg);
    overflow-x: hidden;
    width: 100%;
}

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

.hero-gradient {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
}

/* 无图时：多彩水流动效 - 不同色彩渐变模拟流动 */
.hero-water {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.water-flow {
    position: absolute;
    width: 200%;
    height: 100%;
    animation: waterFlow 12s linear infinite;
}

.water-flow-1 {
    top: 0;
    background: linear-gradient(90deg, transparent, rgba(74,155,138,0.12), transparent, rgba(107,143,113,0.08), transparent);
    animation-duration: 15s;
    animation-delay: 0s;
}
.water-flow-2 {
    top: 25%;
    background: linear-gradient(90deg, transparent, rgba(196,123,91,0.06), transparent, rgba(74,155,138,0.1), transparent);
    animation-duration: 18s;
    animation-delay: -4s;
    opacity: 0.9;
}
.water-flow-3 {
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(107,143,113,0.1), transparent, rgba(58,107,82,0.08), transparent);
    animation-duration: 14s;
    animation-delay: -8s;
    opacity: 0.7;
}
.water-flow-4 {
    top: 50%;
    background: linear-gradient(90deg, transparent, rgba(74,155,138,0.08), transparent, rgba(196,123,91,0.05), transparent);
    animation-duration: 20s;
    animation-delay: -2s;
    opacity: 0.6;
}
.water-flow-5 {
    top: 0;
    background: linear-gradient(90deg, rgba(74,155,138,0.05), transparent, rgba(107,143,113,0.1), transparent, rgba(58,107,82,0.06));
    animation-duration: 22s;
    animation-delay: -12s;
    opacity: 0.5;
}

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

/* 有图时：幻灯片 */
.hero-slides {
    position: absolute;
    inset: 0;
    z-index: 1;
    opacity: 0;
    pointer-events: none;
}

.hero.has-images .hero-slides {
    opacity: 1;
    pointer-events: auto;
}

.hero.has-images .hero-water {
    opacity: 0;
}

.hero-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.8s ease;
}

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

.hero-slide.no-img {
    display: none;
}

.hero-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slide-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(26,51,41,0.75) 0%, rgba(26,51,41,0.45) 100%);
    z-index: 2;
}

/* 文字始终在最上层 */
.hero-inner {
    position: relative;
    z-index: 10;
    max-width: min(800px, 100%);
}

.hero-overline {
    font-size: 0.7rem;
    letter-spacing: 0.35em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.75);
    margin-bottom: var(--space-md);
}

.hero-display {
    font-family: 'Cormorant Garamond', serif;
    font-size: clamp(3.5rem, 9vw, 6.5rem);
    font-weight: 400;
    color: var(--white);
    line-height: 0.95;
    margin-bottom: var(--space-lg);
}

.display-line { display: block; }

.display-accent {
    color: var(--terracotta);
    font-style: italic;
}

.hero-lead {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.9);
    line-height: 1.8;
    margin-bottom: var(--space-xl);
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 1rem 2.2rem;
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-decoration: none;
    border-radius: var(--radius);
    transition: all var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--white);
    border: 2px solid transparent;
}

.btn-primary:hover {
    background: #b86a4a;
    border-color: #b86a4a;
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(196,123,91,0.35);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255,255,255,0.5);
}

.btn-outline:hover {
    border-color: var(--white);
    background: rgba(255,255,255,0.08);
    transform: translateY(-2px);
}

.hero-scroll {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    color: rgba(255,255,255,0.6);
    animation: scrollBounce 2s ease-in-out infinite;
}

.scroll-line {
    width: 1px;
    height: 32px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.5), transparent);
    animation: waterDrip 2s ease-in-out infinite;
}

@keyframes waterDrip {
    0%, 100% { opacity: 1; transform: scaleY(1); }
    50% { opacity: 0.5; transform: scaleY(0.8); }
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(6px); }
}

/* 入场动画 - 交错延迟 */
.animate-in {
    opacity: 0;
    transform: translateY(24px);
    animation: fadeInUp 0.8s var(--ease-out) forwards;
}

.hero-overline.animate-in { animation-delay: 0.1s; }
.hero-display .display-line:first-child { animation-delay: 0.15s; }
.hero-display .display-accent { animation-delay: 0.25s; }
.hero-lead.animate-in { animation-delay: 0.35s; }
.hero-cta.animate-in { animation-delay: 0.45s; }

@keyframes fadeInUp {
    to { opacity: 1; transform: translateY(0); }
}

/* ========== 通用区块 ========== */
.overline {
    display: inline-block;
    font-size: 0.65rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--terracotta);
    margin-bottom: var(--space-sm);
}

.section-title {
    font-family: 'Cormorant Garamond', serif;
    font-size: clamp(2.2rem, 4.5vw, 3rem);
    font-weight: 600;
    color: var(--forest);
    margin-bottom: var(--space-md);
    text-wrap: balance;
    overflow-wrap: break-word;
    word-break: normal;
}

.section-desc {
    font-size: 1rem;
    color: var(--stone);
    max-width: min(520px, 100%);
}

.section-header {
    margin-bottom: var(--space-2xl);
}

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

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

.section-header .section-desc { margin-top: var(--space-sm); }

.section-header.light .section-title,
.section-header.light .section-desc { color: var(--white); }

.section-header.light .overline { color: var(--sage); }

.section-header.light .section-desc { color: rgba(255,255,255,0.85); }

.body-text {
    font-size: 1.05rem;
    color: var(--stone);
    line-height: 1.8;
    word-break: keep-all;
}

/* ========== About ========== */
.about {
    padding: var(--space-2xl) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--space-2xl);
    align-items: center;
    min-width: 0;
}

.about-content { min-width: 0; }

.about-content .body-text { margin-bottom: var(--space-lg); }

.about-features {
    list-style: none;
    margin-bottom: var(--space-lg);
}

.about-features li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.95rem;
    color: var(--forest);
    margin-bottom: var(--space-sm);
}

.feature-dot {
    width: 6px;
    height: 6px;
    background: var(--terracotta);
    border-radius: 50%;
}

.about-img {
    width: 100%;
    aspect-ratio: 4/3;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: var(--space-md);
}

.about-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--ease);
}

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

.about-img.no-img {
    background: var(--gradient-eco);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.5);
    font-size: 0.9rem;
}

.about-card {
    background: var(--gradient-eco);
    padding: var(--space-2xl);
    min-height: 240px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-left: 4px solid var(--terracotta);
    transition: transform var(--transition);
    border-radius: 0 var(--radius) var(--radius) 0;
}

.about-card:hover {
    transform: translateX(8px);
}

.card-overline {
    font-size: 0.65rem;
    letter-spacing: 0.25em;
    color: var(--sage);
    margin-bottom: var(--space-sm);
}

.card-quote {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.6rem;
    line-height: 1.5;
    color: var(--white);
}

/* ========== 荣誉资质 ========== */
.honor {
    padding: var(--space-2xl) 0;
    background: var(--white);
}

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

.honor-item {
    padding: var(--space-xl);
    text-align: center;
    background: var(--cream);
    border: 1px solid var(--sand);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.honor-item:hover {
    border-color: var(--sage);
    box-shadow: 0 12px 40px rgba(26,51,41,0.08);
    transform: translateY(-4px);
}

.honor-icon {
    font-size: 2rem;
    color: var(--terracotta);
    margin-bottom: var(--space-sm);
}

.honor-item h3 {
    font-size: 1.1rem;
    color: var(--forest);
    margin-bottom: var(--space-xs);
}

.honor-item p {
    font-size: 0.9rem;
    color: var(--stone);
}

/* ========== Products ========== */
.products {
    padding: var(--space-2xl) 0;
}

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

.product-card {
    padding: 0;
    background: var(--gradient-card);
    border: 1px solid var(--sand);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
}

.product-img {
    display: block;
    width: 100%;
    aspect-ratio: 4/3;
    overflow: hidden;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--ease);
}

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

.product-img.no-img {
    background: linear-gradient(135deg, #e8f0eb 0%, #dce8e0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--sage);
    font-size: 0.85rem;
}

.product-img.no-img img { display: none !important; }

.product-img.no-img::after {
    content: '图片占位';
    font-size: 0.85rem;
}

.product-card > .product-num,
.product-card > h3,
.product-card > p {
    padding: 0 var(--space-lg);
}

.product-card > .product-num { padding-top: var(--space-md); }
.product-card > p { padding-bottom: var(--space-lg); }

.product-card { min-width: 0; }

.product-card:hover {
    border-color: var(--sage);
    box-shadow: 0 16px 48px rgba(26,51,41,0.08);
    transform: translateY(-6px);
}

.product-num {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--terracotta);
    display: block;
    margin-bottom: var(--space-sm);
}

.product-card h3 {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.4rem;
    color: var(--forest);
    margin-bottom: var(--space-sm);
    word-break: keep-all;
}

.product-card p {
    font-size: 0.95rem;
    color: var(--stone);
    line-height: 1.6;
    orphans: 2;
    widows: 2;
}

/* ========== Solutions ========== */
.solutions {
    padding: var(--space-2xl) 0;
    background: var(--gradient-eco);
}

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

.solution-card {
    padding: var(--space-xl);
    background: rgba(255,255,255,0.04);
    border-top: 3px solid var(--terracotta);
    transition: all var(--transition);
}

.solution-card:hover {
    background: rgba(255,255,255,0.08);
    transform: translateY(-4px);
}

.solution-num {
    font-family: 'Cormorant Garamond', serif;
    font-size: 2rem;
    font-weight: 600;
    color: var(--terracotta);
    display: block;
    margin-bottom: var(--space-sm);
}

.solution-card h3 {
    font-size: 1.05rem;
    color: var(--white);
    margin-bottom: var(--space-xs);
    word-break: keep-all;
}

.solution-card p {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.75);
    orphans: 2;
    widows: 2;
}

/* ========== Sustainability ========== */
.sustainability {
    padding: var(--space-2xl) 0;
    background: var(--gradient-soft);
    position: relative;
}

.sustainability::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: linear-gradient(90deg, transparent 0%, rgba(74,155,138,0.03) 50%, transparent 100%);
    animation: waterShimmer 8s ease-in-out infinite;
    pointer-events: none;
}

@keyframes waterShimmer {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.sustainability-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--space-2xl);
    min-width: 0;
    align-items: center;
}

.sustainability-content .body-text { margin-bottom: var(--space-lg); }

.eco-pills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.pill {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    font-weight: 500;
    background: var(--forest);
    color: var(--white);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.pill:hover {
    background: var(--terracotta);
    transform: scale(1.05);
}

.eco-badge {
    width: 220px;
    height: 220px;
    margin: 0 auto;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: transform var(--transition);
    border: 4px solid rgba(255,255,255,0.3);
    animation: waterPulse 4s ease-in-out infinite;
}

@keyframes waterPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(196,123,91,0.3); }
    50% { box-shadow: 0 0 0 15px rgba(196,123,91,0); }
}

.eco-badge:hover {
    transform: scale(1.05);
}

.badge-main {
    font-family: 'Cormorant Garamond', serif;
    font-size: 2.8rem;
    font-weight: 600;
    letter-spacing: 0.2em;
}

.badge-sub {
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    opacity: 0.95;
}

/* ========== 检测报告 ========== */
.report {
    padding: var(--space-2xl) 0;
    background: var(--white);
}

.report-placeholder {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.report-card {
    padding: 0;
    background: var(--gradient-card);
    border: 1px solid var(--sand);
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-align: center;
    transition: all var(--transition);
}

.report-card:hover {
    border-color: var(--sage);
    transform: translateY(-4px);
}

.report-img {
    width: 100%;
    aspect-ratio: 3/4;
    overflow: hidden;
}

.report-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s var(--ease);
}

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

.report-img.no-img {
    background: linear-gradient(135deg, #e8f0eb 0%, #dce8e0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.report-img.no-img::after {
    content: '📋';
    font-size: 2.5rem;
}

.report-card p {
    padding: var(--space-md);
    font-size: 0.95rem;
    color: var(--forest);
}

/* ========== 新闻资讯 ========== */
.news {
    padding: var(--space-2xl) 0;
    position: relative;
    background: var(--gradient-soft);
}

.news-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.water-wave {
    position: absolute;
    width: 200%;
    height: 120px;
    left: -50%;
    background: linear-gradient(90deg, transparent, rgba(74,155,138,0.06), transparent, rgba(107,143,113,0.04), transparent);
    animation: waveFlow 20s linear infinite;
}

.water-wave { top: 10%; }
.water-wave-2 { top: 60%; animation-duration: 25s; animation-delay: -10s; }

@keyframes waveFlow {
    0% { transform: translateX(0); }
    100% { transform: translateX(50%); }
}

.news-tabs {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.tab-btn {
    padding: 0.6rem 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--stone);
    background: transparent;
    border: 2px solid var(--sand);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
}

.tab-btn:hover {
    color: var(--forest);
    border-color: var(--sage);
}

.tab-btn.active {
    color: var(--white);
    background: var(--forest);
    border-color: var(--forest);
}

.news-content {
    margin-top: var(--space-xl);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
    animation: fadeIn 0.4s var(--ease);
}

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

.news-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--space-lg);
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--sand);
    transition: background var(--transition);
    align-items: center;
}

.news-item:hover {
    background: rgba(107,143,113,0.04);
}

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

.news-thumb {
    position: relative;
    display: block;
    aspect-ratio: 16/10;
    border-radius: var(--radius);
    overflow: hidden;
}

.news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s var(--ease);
}

.news-item:hover .news-thumb img { transform: scale(1.05); }

.news-thumb.no-img {
    background: linear-gradient(135deg, #e8f0eb 0%, #dce8e0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.news-thumb.no-img img { display: none !important; }

.news-thumb.no-img::after {
    content: '图片占位';
    font-size: 0.8rem;
    color: var(--sage);
}

.news-thumb .news-date {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    padding: 0.2rem 0.5rem;
    background: var(--gradient-accent);
    color: var(--white);
    font-size: 0.7rem;
    border-radius: 4px;
}

.news-body { min-width: 0; }

.news-item h3 {
    font-size: 1.1rem;
    color: var(--forest);
    margin-bottom: var(--space-xs);
    word-break: keep-all;
}

.news-item p {
    font-size: 0.95rem;
    color: var(--stone);
    orphans: 2;
    widows: 2;
}

/* ========== 团队风采 ========== */
.team {
    padding: var(--space-2xl) 0;
    background: var(--cream);
}

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

.team-card {
    padding: var(--space-xl);
    text-align: center;
    background: var(--white);
    border: 1px solid var(--sand);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.team-card:hover {
    border-color: var(--sage);
    box-shadow: 0 12px 40px rgba(26,51,41,0.06);
    transform: translateY(-4px);
}

.team-avatar {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-md);
    border-radius: 50%;
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-eco);
    transition: all var(--transition);
}

.team-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-fallback {
    display: none;
    position: absolute;
    inset: 0;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 600;
}

.team-card:hover .team-avatar {
    box-shadow: 0 0 0 3px var(--terracotta);
}

.team-card h3 {
    font-size: 1.1rem;
    color: var(--forest);
    margin-bottom: var(--space-xs);
}

.team-card p {
    font-size: 0.9rem;
    color: var(--stone);
}

/* ========== 视频中心 ========== */
.video {
    padding: var(--space-2xl) 0;
}

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

.video-card {
    border-radius: var(--radius);
    overflow: hidden;
}

.video-placeholder {
    position: relative;
    aspect-ratio: 16/9;
    background: var(--gradient-eco);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-size: 0.9rem;
    color: rgba(255,255,255,0.9);
    transition: all var(--transition);
    cursor: pointer;
    overflow: hidden;
}

.video-placeholder img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s var(--ease);
}

.video-placeholder:hover img { transform: scale(1.05); }

.video-placeholder .play-btn,
.video-placeholder .video-label {
    position: relative;
    z-index: 1;
}

.video-placeholder::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(26,51,41,0.4);
    z-index: 0;
}

.video-placeholder:hover {
    transform: scale(1.02);
}

.play-btn {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--terracotta);
    border-radius: 50%;
    font-size: 1rem;
    color: var(--white);
    transition: transform var(--transition);
}

.video-placeholder:hover .play-btn {
    transform: scale(1.15);
}

/* ========== Contact ========== */
.contact {
    padding: var(--space-2xl) 0;
    background: linear-gradient(135deg, #2c3e50 0%, #1a2a35 50%, #2c3e50 100%);
}

.contact-grid {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--space-xl);
}

.contact-info .section-title { color: var(--white); }

.contact-address {
    color: rgba(255,255,255,0.85);
    line-height: 1.8;
    margin-bottom: var(--space-lg);
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.contact-link {
    text-decoration: none;
    color: var(--white);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.contact-link:hover .link-value { color: var(--terracotta); }

.link-label {
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    opacity: 0.65;
}

.link-value {
    font-size: 1.1rem;
    transition: color var(--transition);
}

.contact-cta p {
    color: rgba(255,255,255,0.9);
    margin-bottom: var(--space-md);
}

.contact-cta .btn-primary {
    background: var(--terracotta);
    border-color: var(--terracotta);
}

/* ========== Footer ========== */
.footer {
    padding: var(--space-xl) 0;
    background: var(--charcoal);
}

.footer-grid {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--space-xl);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-logo {
    text-decoration: none;
    color: var(--white);
}

.footer-logo .logo-img { height: 32px; }

.footer-logo .logo-fallback { display: flex; }
.footer-logo .logo-fallback .logo-text { color: var(--white); }
.footer-logo .logo-fallback .logo-sub { color: rgba(255,255,255,0.7); }

.footer-tagline {
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    color: rgba(255,255,255,0.5);
}

.footer-links {
    display: flex;
    gap: var(--space-lg);
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition);
}

.footer-links a:hover { color: var(--terracotta); }

.footer-copy {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.4);
}

/* ========== 滚动动画 ========== */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========== 响应式 - 手机端对称美观 ========== */
@media (max-width: 1024px) {
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .solutions-grid { grid-template-columns: repeat(2, 1fr); }
    .honor-grid,
    .report-placeholder { grid-template-columns: repeat(2, 1fr); }
    .news-item { grid-template-columns: 160px 1fr; }
}

@media (max-width: 900px) {
    .topbar { display: none; }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--cream);
        padding: var(--space-md);
        box-shadow: 0 8px 24px rgba(26,51,41,0.1);
        max-height: 80vh;
        overflow-y: auto;
    }
    
    .nav.open .nav-links { display: flex; }
    
    .nav-links > li { width: 100%; }
    
    .nav-links > li > a {
        padding: var(--space-sm) var(--space-md);
        border-bottom: 1px solid var(--sand);
    }
    
    .dropdown {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        min-width: auto;
        box-shadow: none;
        padding: 0 0 0 var(--space-md);
        margin-top: var(--space-xs);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s var(--ease);
    }
    
    .has-dropdown.open .dropdown {
        max-height: 300px;
    }
    
    .has-dropdown .arrow {
        transition: transform var(--transition);
    }
    
    .has-dropdown.open .arrow {
        transform: rotate(180deg);
    }
    
    .dropdown a {
        padding: 0.5rem 0;
        font-size: 0.85rem;
    }
    
    .nav-toggle { display: flex; }
    
    .about-grid,
    .sustainability-grid {
        grid-template-columns: 1fr;
    }
    
    /* 产品/荣誉/报告/团队/视频等改为单列 */
    .products-grid,
    .honor-grid,
    .report-placeholder,
    .team-grid,
    .video-grid {
        grid-template-columns: 1fr;
    }

    /* 单列时卡片对称：max-width + 居中 */
    .product-card,
    .honor-item,
    .report-card,
    .solution-card,
    .team-card,
    .video-card {
        max-width: 480px;
        margin-left: auto;
        margin-right: auto;
        width: 100%;
    }

    .section-header { margin-bottom: var(--space-xl); }

    .about-content .body-text { text-align: center; }

    .about-visual { order: -1; }
    
    /* 关于润卡：图片在上、文案在下，居中 */
    .about-content {
        text-align: center;
    }
    
    .about-content .btn { margin: 0 auto; }
    
    .about-features {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .about-visual {
        display: flex;
        flex-direction: column;
        align-items: center;
        max-width: 480px;
        margin: 0 auto;
    }
    
    .contact-grid { flex-direction: column; text-align: center; }
    .contact-cta { text-align: center; }
    .contact-cta .btn { width: 100%; display: block; }
    
    .footer-grid { flex-direction: column; text-align: center; }
    .footer-links { justify-content: center; }
    
    /* 手机端新闻 - 上下对称布局 */
    .news-item {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .news-thumb {
        max-width: 280px;
        margin: 0 auto;
    }
    
    .about-img { order: 1; }
    .about-card { order: 2; }
}

@media (max-width: 600px) {
    .hero {
        padding: var(--space-2xl) 1rem;
    }

    .hero-inner { width: 100%; }

    .products-grid,
    .honor-grid,
    .report-placeholder,
    .team-grid,
    .video-grid {
        grid-template-columns: 1fr;
    }

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

    .hero-cta { flex-direction: column; }
    .btn { width: 100%; text-align: center; }

    .news-item { grid-template-columns: 1fr; }
    .news-body { text-align: center; }

    /* 新闻 Tab 紧凑 - 全宽或更紧凑 */
    .news-tabs { flex-direction: column; align-items: stretch; }
    .news-tabs .tab-btn { flex: 1; width: 100%; }

    /* 小屏 section 内边距缩小 */
    .about, .honor, .products, .solutions, .sustainability,
    .report, .news, .team, .video, .contact {
        padding: var(--space-xl) 0;
    }

    .container { padding: 0 1rem; }

    .section-desc { max-width: 100%; }

    .eco-pills { justify-content: center; }
}