/* ===== 老树石材官网 - 样式表 ===== */

/* --- 基础重置与变量 --- */
:root {
    --color-primary: #2c3e2d;
    --color-primary-light: #4a6741;
    --color-accent: #c8a45c;
    --color-accent-light: #e0c88a;
    --color-dark: #1a1a1a;
    --color-gray: #6b7280;
    --color-light: #f5f3ef;
    --color-white: #ffffff;
    --color-bg-dark: #1c1c1c;
    --font-heading: 'PingFang SC', 'Noto Serif SC', 'STSong', 'Songti SC', serif;
    --font-body: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
    --shadow: 0 4px 24px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 48px rgba(0,0,0,0.12);
    --radius: 12px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    color: var(--color-dark);
    line-height: 1.7;
    background: var(--color-white);
    -webkit-font-smoothing: antialiased;
}

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

/* --- 头部导航 --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.06);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--color-primary);
    font-size: 28px;
    line-height: 1;
}

.logo-icon {
    font-size: 28px;
    color: var(--color-accent);
}

.logo-img {
    width: 41px;
    height: 41px;
    object-fit: contain;
    flex-shrink: 0;
    display: inline-block;
    vertical-align: middle;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 800;
    letter-spacing: 4px;
    line-height: 1;
    color: var(--color-accent);
}

.nav {
    display: flex;
    gap: 8px;
}

.nav-link {
    text-decoration: none;
    color: var(--color-gray);
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background: rgba(44,62,45,0.06);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-dark);
    transition: var(--transition);
}

/* --- Hero --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

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

.hero-slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1.5s ease-in-out, transform 8s ease;
    transform: scale(1.05);
}

.hero-slide.active {
    opacity: 1;
    transform: scale(1);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    z-index: 1;
    background: linear-gradient(135deg, rgba(26,26,46,0.45) 0%, rgba(22,33,62,0.4) 30%, rgba(44,62,45,0.35) 70%, rgba(26,26,26,0.5) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--color-white);
    padding-top: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-title-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 16px;
}

.hero-logo {
    width: 105px;
    height: 105px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: visible;
    margin: 0;
    background: transparent;
    flex-shrink: 0;
}

.hero-logo:active {
    cursor: grabbing;
}

.hero-logo.dragging {
    opacity: 0.85;
}

.hero-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: none;
    pointer-events: none;
    -webkit-user-drag: none;
}

.hero-title-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 16px;
}

.hero-logo-img {
    width: clamp(63px, 10.5vw, 105px);
    height: clamp(63px, 10.5vw, 105px);
    object-fit: contain;
    flex-shrink: 0;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(42px, 7vw, 70px);
    font-weight: 900;
    letter-spacing: 10px;
    margin-bottom: 0;
    color: var(--color-accent);
}

.hero-subtitle {
    font-size: clamp(18px, 3vw, 24px);
    font-weight: 300;
    letter-spacing: 4px;
    margin-bottom: 8px;
    color: var(--color-accent);
}

.hero-slogan {
    font-size: clamp(18px, 3vw, 24px);
    font-weight: 300;
    letter-spacing: 4px;
    margin-bottom: 12px;
    color: var(--color-accent);
}

.hero-desc {
    font-size: 16px;
    color: var(--color-accent);
    margin-bottom: 40px;
    letter-spacing: 1px;
}

.hero-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    letter-spacing: 1px;
}

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

.btn-primary:hover {
    background: var(--color-accent-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(200,164,92,0.4);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border-color: rgba(255,255,255,0.3);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: var(--color-white);
    transform: translateY(-2px);
}

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

.btn-light:hover {
    background: var(--color-accent-light);
    border-color: var(--color-accent-light);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

/* Hero Stats */
.hero-stats {
    position: relative;
    z-index: 2;
    width: 100%;
    padding: 32px 0;
    margin-top: auto;
}

.stats-row {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    color: var(--color-white);
}

.stat-number {
    display: block;
    font-size: 42px;
    font-weight: 800;
    font-family: var(--font-heading);
    color: var(--color-accent);
    line-height: 1.2;
}

.stat-unit {
    font-size: 20px;
    font-weight: 400;
}

.stat-label {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    letter-spacing: 2px;
}

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

/* 卡片链接 */
.card-link {
    text-decoration: none;
    color: inherit;
    display: block;
    transition: var(--transition);
}

.card-link:hover h3,
.card-link:hover h4 {
    color: var(--color-accent);
}

/* 给可点击卡片加指针样式 */
.about-card, .pain-card, .advantage-item, .product-card, .join-card, .timeline-item, .revenue-card, .flow-step {
    cursor: pointer;
}

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

.section-founder {
    background: linear-gradient(180deg, #fafaf8 0%, #f5f3ef 100%);
    border-top: 1px solid rgba(0,0,0,0.04);
    border-bottom: 1px solid rgba(0,0,0,0.04);
}

.section-accent {
    background: linear-gradient(135deg, #2c3e2d, #1a1a2e);
    color: var(--color-white);
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(32px, 5vw, 44px);
    font-weight: 800;
    text-align: center;
    margin-bottom: 12px;
    letter-spacing: 3px;
}

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

.section-subtitle {
    text-align: center;
    color: var(--color-gray);
    font-size: 16px;
    margin-bottom: 60px;
    letter-spacing: 1px;
}

.section-subtitle.light {
    color: rgba(255,255,255,0.6);
}

/* --- 关于我们 --- */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.about-card {
    background: var(--color-white);
    border: 1px solid rgba(0,0,0,0.06);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: var(--transition);
    text-align: center;
}

.about-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.about-card-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.about-card h3 {
    font-family: var(--font-heading);
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--color-primary);
}

.about-card p {
    font-size: 15px;
    color: var(--color-gray);
    line-height: 1.8;
}

.about-card strong {
    color: var(--color-accent);
}

/* --- 行业痛点 --- */
.pain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.pain-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: var(--transition);
}

.pain-card:hover {
    background: rgba(255,255,255,0.08);
    border-color: rgba(200,164,92,0.3);
}

.pain-number {
    font-family: var(--font-heading);
    font-size: 48px;
    font-weight: 900;
    color: rgba(200,164,92,0.3);
    display: block;
    margin-bottom: 12px;
}

.pain-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--color-accent);
}

.pain-card p {
    font-size: 15px;
    color: rgba(255,255,255,0.6);
    line-height: 1.8;
}

/* --- 商业模式 --- */
.model-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 60px;
    padding: 40px;
    background: var(--color-light);
    border-radius: var(--radius);
}

.flow-step {
    text-align: center;
    padding: 20px 16px;
    background: var(--color-white);
    border-radius: var(--radius);
    min-width: 120px;
    box-shadow: var(--shadow);
    position: relative;
    transition: var(--transition);
}

.flow-step.highlight {
    background: var(--color-primary);
    color: var(--color-white);
    transform: scale(1.05);
}

.flow-step:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.flow-step.highlight:hover {
    transform: scale(1.05) translateY(-4px);
}

.flow-icon {
    font-size: 32px;
    margin-bottom: 8px;
}

.flow-step h4 {
    font-size: 16px;
    margin-bottom: 4px;
    font-weight: 700;
}

.flow-step p {
    font-size: 13px;
    color: var(--color-gray);
    line-height: 1.5;
}

.flow-step.highlight p {
    color: rgba(255,255,255,0.8);
}

.flow-tag {
    display: inline-block;
    margin-top: 8px;
    padding: 2px 10px;
    font-size: 11px;
    background: var(--color-accent);
    color: var(--color-dark);
    border-radius: 20px;
    font-weight: 600;
}

.flow-arrow {
    font-size: 24px;
    color: var(--color-accent);
    font-weight: 700;
}

.model-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.model-col {
    background: var(--color-white);
    border: 1px solid rgba(0,0,0,0.06);
    border-radius: var(--radius);
    padding: 36px 28px;
}

.model-col h3 {
    font-family: var(--font-heading);
    font-size: 20px;
    margin-bottom: 16px;
    color: var(--color-primary);
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-accent);
}

.model-col ul {
    list-style: none;
    padding: 0;
}

.model-col ul li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    font-size: 15px;
    color: var(--color-gray);
}

.model-col ul li::before {
    content: '◆';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-size: 10px;
    top: 10px;
}

.model-essence {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px dashed rgba(0,0,0,0.1);
    font-size: 14px;
    color: var(--color-gray);
}

.model-essence strong {
    color: var(--color-primary);
}

/* --- 核心优势 --- */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 24px;
}

.advantage-item {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: var(--transition);
}

.advantage-item:hover {
    border-color: rgba(200,164,92,0.3);
}

.adv-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.adv-num {
    font-family: var(--font-heading);
    font-size: 36px;
    font-weight: 900;
    color: var(--color-accent);
}

.advantage-item h3 {
    font-size: 20px;
    color: var(--color-white);
}

.advantage-item p {
    font-size: 15px;
    color: rgba(255,255,255,0.6);
    line-height: 1.8;
}

.adv-compare {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.adv-old, .adv-new {
    padding: 16px;
    border-radius: 8px;
}

.adv-old {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
}

.adv-new {
    background: rgba(200,164,92,0.1);
    border: 1px solid rgba(200,164,92,0.2);
}

.adv-label {
    display: block;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 8px;
    color: var(--color-accent);
    font-weight: 600;
}

.adv-old p, .adv-new p {
    font-size: 14px;
}

.supply-chain {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    padding: 20px 0;
    font-size: 15px;
    color: var(--color-accent-light);
    font-weight: 600;
}

.supply-chain span:first-child,
.supply-chain span:last-child {
    color: var(--color-accent);
}

/* --- 产品展示 --- */
.upload-hint {
    font-size: 13px;
    color: var(--color-accent);
    font-weight: 500;
    letter-spacing: 0;
}

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

.product-card {
    background: var(--color-white);
    border: 2px dashed rgba(0,0,0,0.08);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
    border-style: solid;
}

.product-img {
    width: 100%;
    height: 260px;
    background: linear-gradient(135deg, #fafaf8 0%, #f0ebe0 50%, #e8dfcc 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

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

.product-img-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-gray);
    gap: 8px;
    padding: 20px;
}

.placeholder-icon {
    font-size: 42px;
    opacity: 0.35;
}

.placeholder-text {
    font-size: 15px;
    font-weight: 600;
    color: rgba(0,0,0,0.35);
    letter-spacing: 2px;
}

.placeholder-action {
    margin-top: 6px;
    font-size: 12px;
    color: var(--color-accent);
    font-weight: 500;
    background: rgba(200,164,92,0.1);
    padding: 6px 16px;
    border-radius: 20px;
    letter-spacing: 1px;
    transition: var(--transition);
}

.product-card:hover .placeholder-action {
    background: var(--color-accent);
    color: var(--color-white);
}

/* 八大块深浮雕卡片背景轮播 */
.relief-slideshow {
    position: relative;
}

.relief-slide,
.craft-slide,
.baofen-slide,
.yibei-slide,
.jinbao-slide,
.sanbei-slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0;
    filter: brightness(1.0);
    transform: scale(1.05);
}

.relief-slide {
    animation: reliefFade 30s infinite;
}

.relief-slide:nth-child(1) { animation-delay: 0s; }
.relief-slide:nth-child(2) { animation-delay: 5s; }
.relief-slide:nth-child(3) { animation-delay: 10s; }
.relief-slide:nth-child(4) { animation-delay: 15s; }
.relief-slide:nth-child(5) { animation-delay: 20s; }
.relief-slide:nth-child(6) { animation-delay: 25s; }

/* 工艺样式花纹卡片背景轮播 */
.craft-slideshow,
.baofen-slideshow,
.yibei-slideshow,
.jinbao-slideshow,
.sanbei-slideshow {
    position: relative;
}

.craft-slide {
    animation: reliefFade 80s infinite;
}

.craft-slide:nth-child(1) { animation-delay: 0s; }
.craft-slide:nth-child(2) { animation-delay: 5s; }
.craft-slide:nth-child(3) { animation-delay: 10s; }
.craft-slide:nth-child(4) { animation-delay: 15s; }
.craft-slide:nth-child(5) { animation-delay: 20s; }
.craft-slide:nth-child(6) { animation-delay: 25s; }
.craft-slide:nth-child(7) { animation-delay: 30s; }
.craft-slide:nth-child(8) { animation-delay: 35s; }
.craft-slide:nth-child(9) { animation-delay: 40s; }
.craft-slide:nth-child(10) { animation-delay: 45s; }
.craft-slide:nth-child(11) { animation-delay: 50s; }
.craft-slide:nth-child(12) { animation-delay: 55s; }
.craft-slide:nth-child(13) { animation-delay: 60s; }
.craft-slide:nth-child(14) { animation-delay: 65s; }
.craft-slide:nth-child(15) { animation-delay: 70s; }
.craft-slide:nth-child(16) { animation-delay: 75s; }

/* 包坟卡片背景轮播 */
.baofen-slide {
    animation: reliefFade 30s infinite;
}

.baofen-slide:nth-child(1) { animation-delay: 0s; }
.baofen-slide:nth-child(2) { animation-delay: 5s; }
.baofen-slide:nth-child(3) { animation-delay: 10s; }
.baofen-slide:nth-child(4) { animation-delay: 15s; }
.baofen-slide:nth-child(5) { animation-delay: 20s; }
.baofen-slide:nth-child(6) { animation-delay: 25s; }

/* 一碑二柱卡片背景轮播 */
.yibei-slide {
    animation: reliefFade 90s infinite;
}

.yibei-slide:nth-child(1) { animation-delay: 0s; }
.yibei-slide:nth-child(2) { animation-delay: 5s; }
.yibei-slide:nth-child(3) { animation-delay: 10s; }
.yibei-slide:nth-child(4) { animation-delay: 15s; }
.yibei-slide:nth-child(5) { animation-delay: 20s; }
.yibei-slide:nth-child(6) { animation-delay: 25s; }
.yibei-slide:nth-child(7) { animation-delay: 30s; }
.yibei-slide:nth-child(8) { animation-delay: 35s; }
.yibei-slide:nth-child(9) { animation-delay: 40s; }
.yibei-slide:nth-child(10) { animation-delay: 45s; }
.yibei-slide:nth-child(11) { animation-delay: 50s; }
.yibei-slide:nth-child(12) { animation-delay: 55s; }
.yibei-slide:nth-child(13) { animation-delay: 60s; }
.yibei-slide:nth-child(14) { animation-delay: 65s; }
.yibei-slide:nth-child(15) { animation-delay: 70s; }
.yibei-slide:nth-child(16) { animation-delay: 75s; }
.yibei-slide:nth-child(17) { animation-delay: 80s; }
.yibei-slide:nth-child(18) { animation-delay: 85s; }

/* 金包银卡片背景轮播 */
.jinbao-slide {
    animation: reliefFade 95s infinite;
}

.jinbao-slide:nth-child(1) { animation-delay: 0s; }
.jinbao-slide:nth-child(2) { animation-delay: 5s; }
.jinbao-slide:nth-child(3) { animation-delay: 10s; }
.jinbao-slide:nth-child(4) { animation-delay: 15s; }
.jinbao-slide:nth-child(5) { animation-delay: 20s; }
.jinbao-slide:nth-child(6) { animation-delay: 25s; }
.jinbao-slide:nth-child(7) { animation-delay: 30s; }
.jinbao-slide:nth-child(8) { animation-delay: 35s; }
.jinbao-slide:nth-child(9) { animation-delay: 40s; }
.jinbao-slide:nth-child(10) { animation-delay: 45s; }
.jinbao-slide:nth-child(11) { animation-delay: 50s; }
.jinbao-slide:nth-child(12) { animation-delay: 55s; }
.jinbao-slide:nth-child(13) { animation-delay: 60s; }
.jinbao-slide:nth-child(14) { animation-delay: 65s; }
.jinbao-slide:nth-child(15) { animation-delay: 70s; }
.jinbao-slide:nth-child(16) { animation-delay: 75s; }
.jinbao-slide:nth-child(17) { animation-delay: 80s; }
.jinbao-slide:nth-child(18) { animation-delay: 85s; }
.jinbao-slide:nth-child(19) { animation-delay: 90s; }

/* 三碑四柱卡片背景轮播 */
.sanbei-slide {
    animation: reliefFade 45s infinite;
}

.sanbei-slide:nth-child(1) { animation-delay: 0s; }
.sanbei-slide:nth-child(2) { animation-delay: 5s; }
.sanbei-slide:nth-child(3) { animation-delay: 10s; }
.sanbei-slide:nth-child(4) { animation-delay: 15s; }
.sanbei-slide:nth-child(5) { animation-delay: 20s; }
.sanbei-slide:nth-child(6) { animation-delay: 25s; }
.sanbei-slide:nth-child(7) { animation-delay: 30s; }
.sanbei-slide:nth-child(8) { animation-delay: 35s; }
.sanbei-slide:nth-child(9) { animation-delay: 40s; }

.relief-overlay,
.craft-overlay,
.baofen-overlay,
.yibei-overlay,
.jinbao-overlay,
.sanbei-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(250,250,248,0.15) 0%, rgba(240,235,224,0.2) 50%, rgba(232,223,204,0.25) 100%);
    z-index: 1;
}

@keyframes reliefFade {
    0% { opacity: 0; transform: scale(1.05); }
    6% { opacity: 1; transform: scale(1); }
    16% { opacity: 1; transform: scale(1); }
    22% { opacity: 0; transform: scale(1.05); }
    100% { opacity: 0; transform: scale(1.05); }
}

.product-body {
    padding: 20px;
}

.product-body h3 {
    font-family: var(--font-heading);
    font-size: 18px;
    margin-bottom: 6px;
    color: var(--color-dark);
}

.product-body .category {
    display: inline-block;
    font-size: 12px;
    color: var(--color-accent);
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 8px;
    background: rgba(200,164,92,0.1);
    padding: 2px 10px;
    border-radius: 12px;
}

.product-body p {
    font-size: 14px;
    color: var(--color-gray);
    line-height: 1.6;
}

/* --- 创始人介绍 --- */
.founders-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.founder-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--color-white);
    border-radius: 16px;
    box-shadow: var(--shadow);
    padding: 40px 32px;
    border: 1px solid rgba(0,0,0,0.05);
    transition: var(--transition);
    text-align: center;
}

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

.founder-avatar {
    display: flex;
    justify-content: center;
    margin-bottom: 24px;
}

.founder-photo {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--color-accent);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    transition: var(--transition);
    cursor: pointer;
}

.founder-photo:hover {
    transform: scale(1.03);
    box-shadow: 0 12px 32px rgba(0,0,0,0.15);
}

.founder-img-placeholder {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: linear-gradient(135deg, #f5f3ef 0%, #e8dfcc 50%, #d5c9b0 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 3px dashed rgba(200,164,92,0.4);
    gap: 6px;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.founder-img-placeholder:hover {
    border-color: var(--color-accent);
    border-style: solid;
    background: linear-gradient(135deg, #fafaf8 0%, #f0ebe0 50%, #e8dfcc 100%);
}

.founder-img-icon {
    font-size: 44px;
    opacity: 0.3;
}

.founder-img-text {
    font-size: 14px;
    font-weight: 600;
    color: rgba(0,0,0,0.35);
    letter-spacing: 2px;
}

.founder-img-hint {
    font-size: 11px;
    color: var(--color-accent);
    font-weight: 500;
    background: rgba(200,164,92,0.1);
    padding: 4px 12px;
    border-radius: 20px;
    letter-spacing: 1px;
}

.founder-img-placeholder:hover .founder-img-hint {
    background: var(--color-accent);
    color: var(--color-white);
}

.founder-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
}

.founder-name-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.founder-name {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 800;
    color: var(--color-dark);
    letter-spacing: 3px;
}

.founder-tag {
    display: inline-block;
    padding: 3px 12px;
    background: var(--color-primary);
    color: var(--color-accent);
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
    letter-spacing: 1px;
}

.founder-intro {
    font-size: 14px;
    color: var(--color-gray);
    line-height: 1.8;
    max-width: 360px;
}

.founder-social {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
}

.founder-contact-item {
    font-size: 13px;
    color: var(--color-gray);
}

.founder-phone {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
    padding: 4px 12px;
    background: rgba(44,62,45,0.04);
    border-radius: 20px;
}

.founder-phone:hover {
    color: var(--color-accent);
    background: rgba(200,164,92,0.08);
}

/* 共同理念 */
.founder-quote-shared {
    max-width: 800px;
    margin: 36px auto 0;
    padding: 20px 28px;
    background: var(--color-white);
    border-left: 4px solid var(--color-accent);
    border-radius: 0 8px 8px 0;
    box-shadow: var(--shadow);
}

.founder-quote-shared p {
    font-size: 16px;
    color: var(--color-primary);
    font-style: italic;
    line-height: 1.8;
    margin: 0;
    letter-spacing: 1px;
}

/* --- 招商加盟 --- */
.join-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 20px;
    margin-bottom: 48px;
}

.join-card {
    text-align: center;
    padding: 32px 20px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
    transition: var(--transition);
}

.join-card:hover {
    background: rgba(255,255,255,0.12);
    transform: translateY(-4px);
    border-color: var(--color-accent);
}

.join-icon {
    font-size: 40px;
    margin-bottom: 12px;
}

.join-card h3 {
    font-size: 17px;
    margin-bottom: 8px;
    color: var(--color-accent-light);
}

.join-card p {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    line-height: 1.6;
}

.join-cta {
    text-align: center;
    padding: 40px;
    background: rgba(255,255,255,0.06);
    border-radius: var(--radius);
}

.join-cta p {
    font-size: 18px;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

/* --- 时间线 --- */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 100px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent), var(--color-primary-light));
}

.timeline-item {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
    position: relative;
}

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

.timeline-year {
    width: 100px;
    flex-shrink: 0;
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 800;
    color: var(--color-accent);
    text-align: right;
    padding-top: 4px;
}

.timeline-content {
    background: var(--color-white);
    border: 1px solid rgba(0,0,0,0.06);
    border-radius: var(--radius);
    padding: 24px 28px;
    position: relative;
    flex: 1;
    box-shadow: var(--shadow);
}

.timeline-content::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 16px;
    width: 16px;
    height: 16px;
    background: var(--color-accent);
    border-radius: 50%;
}

.timeline-content h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--color-primary);
}

.timeline-content p {
    font-size: 15px;
    color: var(--color-gray);
    line-height: 1.7;
}

/* --- 收入结构 --- */
.revenue-grid {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 28px;
    height: 300px;
    padding-top: 20px;
}

.revenue-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 140px;
}

.revenue-bar {
    width: 60px;
    background: linear-gradient(to top, var(--color-accent), var(--color-accent-light));
    border-radius: 6px 6px 0 0;
    transition: var(--transition);
    position: relative;
}

.revenue-card:hover .revenue-bar {
    filter: brightness(1.2);
}

.revenue-info {
    text-align: center;
    margin-top: 16px;
}

.revenue-info h3 {
    font-size: 15px;
    color: rgba(255,255,255,0.8);
    margin-bottom: 4px;
}

.revenue-pct {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 800;
    color: var(--color-accent);
}

.revenue-info p {
    font-size: 12px;
    color: rgba(255,255,255,0.5);
    margin-top: 4px;
}

/* --- 联系我们 --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

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

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

.contact-icon {
    font-size: 24px;
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-item h4 {
    font-size: 16px;
    margin-bottom: 4px;
    color: var(--color-dark);
}

.contact-item p {
    font-size: 15px;
    color: var(--color-gray);
    line-height: 1.8;
}

.contact-phone {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    letter-spacing: 1px;
    transition: var(--transition);
}

.contact-phone:hover {
    color: var(--color-accent);
}

.contact-phone-row {
    margin-bottom: 4px;
}

.contact-phone-link {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    letter-spacing: 1px;
    transition: var(--transition);
    display: inline-block;
    padding: 4px 0;
}

.contact-phone-link:hover {
    color: var(--color-accent);
}

.contact-form {
    background: var(--color-light);
    padding: 36px;
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: 8px;
    font-size: 15px;
    font-family: var(--font-body);
    background: var(--color-white);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(200,164,92,0.15);
}

.form-group select {
    color: var(--color-gray);
    cursor: pointer;
}

/* --- 页脚 --- */
.footer {
    background: var(--color-dark);
    color: rgba(255,255,255,0.7);
    padding: 60px 0 24px;
}

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

.footer-brand .logo-icon {
    font-size: 24px;
}

.footer-brand .logo-img {
    width: 41px;
    height: 41px;
}

.footer-brand .logo-text {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-accent);
}

.footer-brand p {
    margin-top: 8px;
    font-size: 14px;
    color: rgba(255,255,255,0.5);
}

.footer-links h4 {
    color: var(--color-white);
    margin-bottom: 16px;
    font-size: 16px;
}

.footer-links a {
    display: block;
    color: rgba(255,255,255,0.5);
    text-decoration: none;
    padding: 4px 0;
    font-size: 14px;
    transition: var(--transition);
}

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

.footer-links p {
    font-size: 13px;
    color: rgba(255,255,255,0.4);
    margin-bottom: 4px;
    line-height: 1.6;
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.08);
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.35);
}

/* --- 响应式 --- */
@media (max-width: 1024px) {
    .model-detail {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .hero-logo {
        width: 70px;
        height: 70px;
        top: 10px;
        right: 10px;
    }

    .nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(255,255,255,0.98);
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid rgba(0,0,0,0.06);
        display: none;
    }

    .nav.open {
        display: flex;
    }

    .menu-toggle {
        display: flex;
    }

    .hero-stats {
        display: none;
    }

    .stats-row {
        gap: 24px;
    }

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

    .model-flow {
        flex-direction: column;
        gap: 16px;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

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

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

    .timeline::before {
        left: 60px;
    }

    .timeline-item {
        gap: 20px;
    }

    .timeline-year {
        width: 60px;
        font-size: 18px;
    }

    .revenue-grid {
        height: auto;
        flex-wrap: wrap;
        justify-content: center;
    }

    .revenue-card {
        width: 100px;
    }

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

@media (max-width: 480px) {
    .hero-logo {
        width: 50px;
        height: 50px;
        top: 8px;
        right: 8px;
    }

    .section {
        padding: 60px 0;
    }

    .hero-title {
        font-size: 40px;
        letter-spacing: 4px;
    }

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

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

    .founder-card {
        padding: 28px 20px;
    }

    .founder-photo {
        width: 160px;
        height: 160px;
    }

    .founder-img-placeholder {
        width: 160px;
        height: 160px;
    }

    .founder-quote-shared {
        margin: 28px 16px 0;
        padding: 16px 20px;
    }

    .founder-social {
        justify-content: center;
    }
}

/* --- Toast 提示 --- */
.toast {
    position: fixed;
    top: 24px;
    right: 24px;
    padding: 16px 28px;
    border-radius: 8px;
    color: #fff;
    font-size: 15px;
    font-weight: 500;
    z-index: 9999;
    transform: translateX(120%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.toast.show {
    transform: translateX(0);
}

.toast-success {
    background: #2c3e2d;
}

.toast-warning {
    background: #c8a45c;
    color: #1a1a1a;
}

/* --- 图片预览弹窗 --- */
.image-preview-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.85);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    animation: fadeIn 0.2s ease;
}

.image-preview-box {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
}

.image-preview-box img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 8px;
}

.image-preview-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: none;
    border: none;
    color: #fff;
    font-size: 36px;
    cursor: pointer;
    line-height: 1;
    padding: 0 8px;
}

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

/* 让卡片链接覆盖整个卡片 */
.about-card, .pain-card, .model-card, .advantage-item, .product-card, .join-card, .timeline-item, .revenue-card, .flow-step {
    position: relative;
}

.about-card .card-link::after,
.pain-card .card-link::after,
.model-card .card-link::after,
.advantage-item .card-link::after,
.product-card .card-link::after,
.join-card .card-link::after,
.timeline-item .card-link::after,
.revenue-card .card-link::after,
.flow-step .card-link::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.about-card .card-link h3,
.about-card .card-link h4,
.pain-card .card-link h3,
.pain-card .card-link h4,
.model-card .card-link h3,
.model-card .card-link h4,
.advantage-item .card-link h3,
.advantage-item .card-link h4,
.product-card .card-link h3,
.product-card .card-link h4,
.join-card .card-link h3,
.join-card .card-link h4,
.timeline-item .card-link h3,
.timeline-item .card-link h4,
.revenue-card .card-link h3,
.revenue-card .card-link h4,
.flow-step .card-link h3,
.flow-step .card-link h4 {
    position: relative;
    z-index: 2;
}