/* ========================================
   亿凰纺织 - 面料展示官网
   简约商务风 · 浅色主题
   ======================================== */

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

:root {
    --color-primary: #1a3a5c;
    --color-primary-light: #2c5478;
    --color-primary-dark: #0f2740;
    --color-accent: #c9a96e;
    --color-accent-light: #dabd8e;
    --color-accent-dark: #b08e54;
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-bg-dark: #1a1f2e;
    --color-text: #2c3e50;
    --color-text-light: #6c7a89;
    --color-text-muted: #95a0ab;
    --color-border: #e8eaed;
    --color-white: #ffffff;
    --shadow-sm: 0 2px 8px rgba(26, 58, 92, 0.06);
    --shadow-md: 0 8px 30px rgba(26, 58, 92, 0.08);
    --shadow-lg: 0 20px 60px rgba(26, 58, 92, 0.12);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 24px;
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Playfair Display', 'Noto Serif SC', serif;
}

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

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

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

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

ul {
    list-style: none;
}

/* ========== 容器 ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-sans);
    letter-spacing: 0.03em;
}

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

.btn-primary:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(26, 58, 92, 0.25);
}

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

.btn-outline:hover {
    border-color: var(--color-primary);
    background: var(--color-bg-alt);
}

.btn-full {
    width: 100%;
}

/* ========== 语言切换 ========== */
.lang-switch {
    display: flex;
    align-items: center;
    gap: 4px;
    background: rgba(26, 58, 92, 0.06);
    border-radius: 100px;
    padding: 3px 8px;
}

.lang-btn {
    background: none;
    border: none;
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--color-text-light);
    cursor: pointer;
    padding: 4px 10px;
    border-radius: 100px;
    transition: var(--transition);
    white-space: nowrap;
}

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

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

.lang-divider {
    color: var(--color-text-muted);
    font-size: 0.7rem;
}

/* ========== 导航栏 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
}

.logo-img {
    height: 46px;
    width: auto;
    display: block;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.header .logo:hover .logo-img {
    transform: scale(1.02);
}

.footer-brand .logo-img {
    height: 52px;
}

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

.nav-link {
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--color-text);
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

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

.nav-cta {
    padding: 10px 24px;
    color: var(--color-white) !important;
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
    border-radius: 2px;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========== Hero 区域 ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    background: linear-gradient(160deg, #f4f6f9 0%, #eef1f5 50%, #f8f9fa 100%);
    overflow: hidden;
}

.hero-bg-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        repeating-linear-gradient(45deg, transparent, transparent 35px, rgba(26, 58, 92, 0.015) 35px, rgba(26, 58, 92, 0.015) 36px),
        repeating-linear-gradient(-45deg, transparent, transparent 35px, rgba(201, 169, 110, 0.02) 35px, rgba(201, 169, 110, 0.02) 36px);
    pointer-events: none;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
    padding: 60px 24px 120px;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(201, 169, 110, 0.12);
    color: var(--color-accent-dark);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 24px;
    letter-spacing: 0.05em;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    color: var(--color-primary-dark);
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 480px;
}

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

/* Hero 面料色块视觉 */
.hero-visual {
    position: relative;
    height: 480px;
}

.fabric-swatch {
    position: absolute;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: flex-end;
    padding: 16px;
    transition: var(--transition);
    animation: floatSwatch 6s ease-in-out infinite;
}

.fabric-swatch:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-lg);
    z-index: 10;
}

.swatch-label {
    background: rgba(255, 255, 255, 0.9);
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text);
    backdrop-filter: blur(4px);
}

/* 纯棉 · 米白 */
.swatch-1 {
    width: 260px;
    height: 280px;
    top: 20px;
    left: 20px;
    background:
        repeating-linear-gradient(0deg, #f5f0e6, #f5f0e6 2px, #ede7db 2px, #ede7db 4px),
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(0,0,0,0.02) 2px, rgba(0,0,0,0.02) 4px);
    background-blend-mode: multiply;
    animation-delay: 0s;
    z-index: 2;
}

/* 亚麻 · 原色 */
.swatch-2 {
    width: 200px;
    height: 220px;
    top: 240px;
    left: 180px;
    background:
        repeating-linear-gradient(45deg, #c8b896, #c8b896 3px, #bda884 3px, #bda884 6px),
        repeating-linear-gradient(-45deg, transparent, transparent 3px, rgba(0,0,0,0.04) 3px, rgba(0,0,0,0.04) 6px);
    background-blend-mode: multiply;
    animation-delay: 1.5s;
    z-index: 3;
}

/* 混纺 · 雾灰 */
.swatch-3 {
    width: 180px;
    height: 200px;
    top: 60px;
    right: 0;
    background:
        repeating-linear-gradient(0deg, #a0aab5, #a0aab5 1px, #929cab 1px, #929cab 2px),
        linear-gradient(135deg, #aab4be, #8a94a0);
    background-blend-mode: overlay;
    animation-delay: 3s;
    z-index: 1;
}

/* 丝绸 · 藏青 */
.swatch-4 {
    width: 160px;
    height: 180px;
    bottom: 0;
    right: 80px;
    background:
        linear-gradient(135deg, #1a3a5c 0%, #2c5478 30%, #1a3a5c 60%, #3a6488 100%);
    animation-delay: 4.5s;
    z-index: 2;
}

@keyframes floatSwatch {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* Hero 波浪 */
.hero-wave {
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    z-index: 1;
}

.hero-wave svg {
    width: 100%;
    height: 80px;
    display: block;
}

/* ========== 数据统计 ========== */
.stats {
    background: var(--color-bg-alt);
    padding: 60px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-item {
    position: relative;
}

.stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: -15px;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 60px;
    background: var(--color-border);
}

.stat-number {
    display: inline;
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--color-primary);
    font-family: var(--font-display);
    line-height: 1;
}

.stat-suffix {
    display: inline;
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--color-accent);
    margin-left: 4px;
}

.stat-label {
    margin-top: 8px;
    font-size: 0.95rem;
    color: var(--color-text-light);
}

/* ========== 通用 Section ========== */
.section {
    padding: 100px 0;
}

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

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-accent);
    letter-spacing: 0.15em;
    margin-bottom: 12px;
}

.section-title {
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    line-height: 1.3;
    margin-bottom: 16px;
}

.section-title.text-left {
    text-align: left;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--color-text-light);
}

/* ========== 面料分类 ========== */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
}

.category-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 36px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.category-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.category-card:hover::before {
    transform: scaleX(1);
}

.category-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
}

/* 面料纹理图标 */
.fabric-cotton {
    background:
        repeating-linear-gradient(0deg, #e8dcc8, #e8dcc8 2px, #d9cab0 2px, #d9cab0 4px),
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(0,0,0,0.03) 2px, rgba(0,0,0,0.03) 4px);
    background-blend-mode: multiply;
}

.fabric-linen {
    background:
        repeating-linear-gradient(45deg, #c8b896, #c8b896 3px, #b5a280 3px, #b5a280 6px);
}

.fabric-silk {
    background:
        linear-gradient(135deg, #1a3a5c 0%, #3a6488 50%, #1a3a5c 100%);
}

.fabric-blend {
    background:
        repeating-linear-gradient(0deg, #a0aab5, #a0aab5 1px, #8a94a0 1px, #8a94a0 2px),
        linear-gradient(135deg, #aab4be, #8a94a0);
    background-blend-mode: overlay;
}

.fabric-tech {
    background:
        linear-gradient(135deg, #2c5478 0%, #4a7ba0 50%, #2c5478 100%);
    position: relative;
}

.fabric-tech::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(90deg, transparent, transparent 8px, rgba(255,255,255,0.1) 8px, rgba(255,255,255,0.1) 9px);
    border-radius: inherit;
}

.category-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 10px;
}

.category-card p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 16px;
}

.category-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(201, 169, 110, 0.12);
    color: var(--color-accent-dark);
    border-radius: 100px;
    font-size: 0.78rem;
    font-weight: 500;
}

/* ========== 产品展示 ========== */
.filter-bar {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 22px;
    border: 1px solid var(--color-border);
    background: var(--color-white);
    border-radius: 100px;
    font-size: 0.9rem;
    color: var(--color-text-light);
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-sans);
}

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

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

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 28px;
}

.product-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.product-card.hidden {
    display: none;
}

.product-image {
    height: 220px;
    position: relative;
    overflow: hidden;
}

.product-info {
    padding: 20px 24px 24px;
}

.product-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 8px;
}

.product-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.spec-tag {
    padding: 3px 10px;
    background: var(--color-bg-alt);
    border-radius: 4px;
    font-size: 0.78rem;
    color: var(--color-text-light);
}

.product-desc {
    font-size: 0.88rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

.product-overlay {
    position: absolute;
    inset: 0;
    background: rgba(26, 58, 92, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

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

.product-overlay-text {
    color: var(--color-white);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 10px 24px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 100px;
    backdrop-filter: blur(4px);
}

.products-more {
    text-align: center;
    margin-top: 48px;
}

/* 产品面料纹理 */
.tex-cotton-white {
    background:
        repeating-linear-gradient(0deg, #f5f0e6, #f5f0e6 2px, #ede7db 2px, #ede7db 4px),
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(0,0,0,0.02) 2px, rgba(0,0,0,0.02) 4px);
    background-blend-mode: multiply;
}

.tex-cotton-blue {
    background:
        repeating-linear-gradient(0deg, #4a6b8a, #4a6b8a 2px, #3d5c77 2px, #3d5c77 4px),
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(0,0,0,0.03) 2px, rgba(0,0,0,0.03) 4px);
    background-blend-mode: multiply;
}

.tex-linen-natural {
    background:
        repeating-linear-gradient(45deg, #c8b896, #c8b896 3px, #b5a280 3px, #b5a280 6px);
}

.tex-linen-grey {
    background:
        repeating-linear-gradient(45deg, #9a9a8e, #9a9a8e 3px, #888878 3px, #888878 6px);
}

.tex-silk-navy {
    background:
        linear-gradient(135deg, #1a3a5c 0%, #3a6488 30%, #1a3a5c 60%, #3a6488 100%);
}

.tex-silk-burgundy {
    background:
        linear-gradient(135deg, #722f37 0%, #9c4a52 30%, #722f37 60%, #9c4a52 100%);
}

.tex-blend-charcoal {
    background:
        repeating-linear-gradient(0deg, #4a4a52, #4a4a52 1px, #3e3e46 1px, #3e3e46 2px),
        linear-gradient(135deg, #555560, #3a3a42);
    background-blend-mode: overlay;
}

.tex-blend-khaki {
    background:
        repeating-linear-gradient(0deg, #b5a070, #b5a070 1px, #a89060 1px, #a89060 2px),
        linear-gradient(135deg, #c0ac80, #9a8555);
    background-blend-mode: overlay;
}

.tex-tech-waterproof {
    background:
        linear-gradient(135deg, #2c5478 0%, #4a7ba0 50%, #2c5478 100%);
    position: relative;
}

.tex-tech-waterproof::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(90deg, transparent, transparent 8px, rgba(255,255,255,0.12) 8px, rgba(255,255,255,0.12) 9px);
}

.tex-tech-uv {
    background:
        linear-gradient(135deg, #3a5a3a 0%, #5a8a5a 50%, #3a5a3a 100%);
    position: relative;
}

.tex-tech-uv::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 30% 30%, rgba(255,255,255,0.15), transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(255,255,255,0.1), transparent 50%);
}

/* ========== 关于我们 ========== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
}

.about-visual {
    position: relative;
}

.about-image-main {
    height: 420px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow-lg);
}

.about-pattern {
    width: 100%;
    height: 100%;
    background:
        repeating-linear-gradient(0deg, #e8dcc8, #e8dcc8 2px, #d9cab0 2px, #d9cab0 4px),
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(0,0,0,0.02) 2px, rgba(0,0,0,0.02) 4px);
    background-blend-mode: multiply;
}

.about-image-sub {
    position: absolute;
    bottom: -30px;
    right: -20px;
    width: 180px;
    height: 140px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 6px solid var(--color-white);
}

.about-pattern-sm {
    width: 100%;
    height: 100%;
    background:
        linear-gradient(135deg, #1a3a5c 0%, #3a6488 50%, #1a3a5c 100%);
}

.about-badge-floating {
    position: absolute;
    top: 24px;
    left: -24px;
    background: var(--color-white);
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.badge-number {
    font-size: 1.2rem;
    font-weight: 900;
    color: var(--color-primary);
    font-family: var(--font-display);
}

.badge-text {
    font-size: 0.78rem;
    color: var(--color-text-light);
    margin-top: 2px;
}

.about-content .section-tag {
    margin-bottom: 12px;
}

.about-text {
    color: var(--color-text-light);
    line-height: 1.9;
    margin: 20px 0 32px;
    font-size: 1rem;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.feature-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.feature-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    background: rgba(26, 58, 92, 0.08);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
}

.feature-item h4 {
    font-size: 0.98rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 4px;
}

.feature-item p {
    font-size: 0.85rem;
    color: var(--color-text-light);
    line-height: 1.5;
}

/* ========== 联系我们 ========== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 50px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
}

.contact-item h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 0.92rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

.contact-form-wrapper {
    background: var(--color-white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

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

.form-group label {
    display: block;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg-alt);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
    background: var(--color-white);
    box-shadow: 0 0 0 3px rgba(26, 58, 92, 0.08);
}

.form-group textarea {
    resize: vertical;
}

.form-tip {
    margin-top: 12px;
    font-size: 0.88rem;
    text-align: center;
    min-height: 20px;
}

.form-tip.success {
    color: #2e7d32;
}

.form-tip.error {
    color: #c62828;
}

/* ========== Footer ========== */
.footer {
    background: var(--color-bg-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 70px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-brand .logo {
    color: var(--color-white);
    margin-bottom: 16px;
}

.footer-desc {
    font-size: 0.9rem;
    line-height: 1.7;
    max-width: 280px;
}

.footer-col h4 {
    color: var(--color-white);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-col a,
.footer-col p {
    display: block;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 10px;
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    padding-top: 28px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

/* ========== 返回顶部 ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow-md);
}

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

.back-to-top:hover {
    background: var(--color-primary-light);
    transform: translateY(-4px);
}

/* ========== 滚动动画 ========== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========== 浮动联系按钮 ========== */
.contact-fab {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 998;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 12px;
}

.fab-btn {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
    transition: var(--transition);
    position: relative;
    color: var(--color-white);
}

.fab-main {
    background: var(--color-primary);
    z-index: 2;
    animation: fabPulse 3s ease-in-out infinite;
}

.fab-main:hover {
    background: var(--color-primary-light);
    transform: scale(1.08);
    animation: none;
}

.fab-main svg {
    transition: transform 0.3s ease;
}

.fab-main.active svg {
    transform: rotate(135deg);
}

@keyframes fabPulse {
    0%, 100% { box-shadow: 0 4px 16px rgba(26, 58, 92, 0.15); }
    50% { box-shadow: 0 4px 24px rgba(26, 58, 92, 0.35); }
}

.fab-menu {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: flex-end;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

.fab-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.fab-sub {
    width: 48px;
    height: 48px;
    background: var(--color-white);
    color: var(--color-text);
    border: 2px solid var(--color-border);
    overflow: hidden;
}

.fab-sub:hover {
    transform: translateY(-2px);
    border-color: var(--color-primary);
}

.fab-sub img {
    width: 20px;
    height: 20px;
    object-fit: contain;
}

.fab-sub svg {
    color: var(--color-primary);
}

.zalo-fallback {
    color: var(--color-primary);
    font-weight: 700;
}

.fab-tooltip {
    position: absolute;
    right: 60px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--color-text);
    color: var(--color-white);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.78rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    pointer-events: none;
}

.fab-sub:hover .fab-tooltip {
    opacity: 1;
    visibility: visible;
}

.fab-sub[data-type="whatsapp"] { background: #25d366; color: #fff; border-color: #25d366; }
.fab-sub[data-type="whatsapp"] img { filter: brightness(0) invert(1); }
.fab-sub[data-type="zalo"] { background: #0068ff; color: #fff; border-color: #0068ff; }
.fab-sub[data-type="zalo"] img { filter: brightness(0) invert(1); }
.fab-sub[data-type="wechat"] { background: #07c160; color: #fff; border-color: #07c160; }

/* QR弹窗 */
.qr-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1100;
    padding: 20px;
}

.qr-modal-overlay.show { display: flex; }

.qr-modal {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 32px;
    max-width: 340px;
    width: 100%;
    text-align: center;
    box-shadow: var(--shadow-lg);
    position: relative;
    animation: qrPopIn 0.3s ease;
}

@keyframes qrPopIn {
    from { transform: scale(0.85); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.qr-modal-close {
    position: absolute;
    top: 12px;
    right: 16px;
    background: none;
    border: none;
    font-size: 1.6rem;
    cursor: pointer;
    color: var(--color-text-light);
    line-height: 1;
}

.qr-modal h3 {
    font-size: 1.1rem;
    color: var(--color-primary-dark);
    margin-bottom: 16px;
}

.qr-modal img {
    width: 100%;
    max-width: 240px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    margin: 0 auto 12px;
    display: block;
}

.qr-modal p {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

/* ========== 响应式 ========== */
@media (max-width: 968px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-visual {
        height: 360px;
        max-width: 400px;
        margin: 0 auto;
    }

    .hero-title {
        font-size: 2.5rem;
    }

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

    .about-visual {
        max-width: 480px;
        margin: 0 auto;
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px 20px;
    }

    .stat-item:nth-child(2)::after {
        display: none;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--color-white);
        padding: 30px 24px;
        gap: 20px;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
        transform: translateY(-120%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

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

    .nav-cta {
        width: 100%;
        justify-content: center;
    }

    .lang-switch {
        margin: 0 auto;
    }

    .menu-toggle {
        display: flex;
    }

    .section {
        padding: 70px 0;
    }

    .section-title {
        font-size: 1.9rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

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

    .contact-form-wrapper {
        padding: 28px 20px;
    }

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

    .about-image-sub {
        display: none;
    }

    .about-badge-floating {
        left: 16px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 1.7rem;
    }

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

    .stat-item::after {
        display: none !important;
    }

    .filter-bar {
        gap: 8px;
    }

    .filter-btn {
        padding: 6px 16px;
        font-size: 0.85rem;
    }

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