/* ============================================================
   沧数云科 — Apple Design Language Edition
   设计理念：简洁、留白、摄影优先、交替区块
   
   色彩体系（Apple-inspired）：
     主色 Action Blue    #0066cc
     聚焦 Focus Blue     #0071e3  
     近黑墨 Near-Black   #1d1d1f
     羊皮纸 Parchment     #f5f5f7
     纯白 White          #ffffff
     深色瓦片 Dark Tile   #272729 / #1d1d1f
     天空链接蓝           #2997ff
============================================================ */

/* ---- CSS 变量 ---- */
:root {
    /* === 主色调 === */
    --color-primary:      #0066cc;
    --color-primary-hover:#0055b3;
    --color-focus:        #0071e3;
    --color-sky-link:     #2997ff;

    /* === 文字色 === */
    --color-ink:          #1d1d1f;
    --color-white:        #ffffff;
    --color-ink-muted:    rgba(0, 0, 0, 0.48);
    --color-ink-soft:     rgba(0, 0, 0, 0.65);
    --color-white-muted:  rgba(255, 255, 255, 0.65);
    --color-white-soft:   rgba(255, 255, 255, 0.8);

    /* === 背景色 === */
    --color-bg-white:     #ffffff;
    --color-bg-parchment: #f5f5f7;
    --color-bg-dark:      #1d1d1f;
    --color-bg-dark-alt:  #272729;
    --color-bg-darker:    #000000;

    /* === 中性与装饰 === */
    --color-pearl:        #fafafc;
    --color-chip-gray:    rgba(210, 210, 215, 0.64);
    --color-divider:      rgba(0, 0, 0, 0.04);
    --color-border-light: rgba(0, 0, 0, 0.08);
    --color-border-dark:  rgba(255, 255, 255, 0.12);

    /* === 品牌保留色（沧数特色）=== */
    --color-accent:       #0071e3;
    
    /* === 圆角系统 === */
    --radius-xs:      5px;
    --radius-sm:      8px;
    --radius-md:      11px;
    --radius-lg:      18px;
    --radius-pill:    980px;
    --radius-full:    50%;

    /* === 阴影 === */
    --shadow-product:  0 3px 30px rgba(0, 0, 0, 0.22);
    --shadow-subtle:  0 2px 12px rgba(0, 0, 0, 0.06);

    /* === 字体与排版 === */
    --font-display:   -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Inter', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-body:      -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Inter', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-mono:      'SF Mono', SFMono-Regular, ui-monospace, Menlo, monospace;
    
    /* === 尺寸 === */
    --header-h:       48px;
    --container-max:  980px;
    --container-wide: 1440px;
    
    /* === 过渡 === */
    --transition:     0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition-fast:0.2s ease;
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { 
    scroll-behavior: smooth; 
    font-size: 16px; 
    -webkit-text-size-adjust: 100%;
}
body {
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.47;
    color: var(--color-ink);
    background: var(--color-bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}
a { 
    color: inherit; 
    text-decoration: none; 
    transition: color var(--transition-fast); 
}
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; font-size: inherit; }
input, textarea, select { font-family: inherit; }

::selection {
    background: rgba(0, 102, 204, 0.2);
}

/* ---- 布局容器 ---- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 22px;
}
.container-wide {
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: 0 22px;
}
.section { 
    padding: 80px 0; 
    position: relative;
}
.section-sm { padding: 56px 0; }
.section-large { padding: 112px 0; }

/* ---- 通用标题 ---- */
.section-header { 
    text-align: center; 
    margin-bottom: 64px; 
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}
.section-tag {
    display: inline-block;
    font-family: var(--font-body);
    font-size: 11px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 14px;
    font-weight: 500;
}
.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 600;
    color: var(--color-ink);
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 14px;
}
.section-title span { color: var(--color-primary); }
.section-desc {
    font-size: 17px;
    color: var(--color-ink-muted);
    line-height: 1.55;
    max-width: 540px;
    margin: 0 auto;
}

/* ============================================================
   BUTTONS — Apple-style pill buttons
============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 400;
    transition: all var(--transition);
    white-space: nowrap;
    user-select: none;
    -webkit-user-select: none;
}
.btn:focus-visible {
    outline: 2px solid var(--color-focus);
    outline-offset: 2px;
}

/* Primary Blue Pill — the signature action button */
.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--radius-pill);
    padding: 11px 24px;
    border: none;
}
.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: scale(0.97);
}
.btn-primary:active {
    transform: scale(0.95);
}

/* Secondary Ghost Pill */
.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-radius: var(--radius-pill);
    padding: 11px 24px;
    border: 1px solid var(--color-primary);
}
.btn-outline:hover {
    background: rgba(0, 102, 204, 0.06);
    transform: scale(0.97);
}
.btn-outline:active {
    transform: scale(0.95);
}

/* Light outline variant (for dark backgrounds) */
.btn-outline-light {
    background: transparent;
    color: var(--color-white);
    border-radius: var(--radius-pill);
    padding: 11px 24px;
    border: 1px solid rgba(255, 255, 255, 0.5);
}
.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-white);
    transform: scale(0.97);
}

/* Accent / CTA */
.btn-accent {
    background: var(--color-sky-link);
    color: var(--color-white);
    border-radius: var(--radius-pill);
    padding: 13px 32px;
    font-size: 16px;
    border: none;
}
.btn-accent:hover {
    background: #1070e8;
    transform: scale(0.97);
}

/* ============================================================
   HEADER — Global Nav Bar
============================================================ */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    height: var(--header-h);
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    transition: background var(--transition);
}
.site-header.scrolled {
    background: rgba(0, 0, 0, 0.94);
}
.header-inner {
    height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}
/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 9px;
    flex-shrink: 0;
    text-decoration: none;
}
.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-name {
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 600;
    color: var(--color-white);
    letter-spacing: -0.02em;
}
.logo-slogan {
    font-size: 9px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--color-sky-link);
    font-weight: 400;
}
/* Nav Links */
.main-nav ul { 
    display: flex; 
    align-items: center; 
    gap: 0;
}
.main-nav a {
    display: block;
    padding: 0 14px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.82);
    letter-spacing: -0.01em;
    transition: all var(--transition-fast);
    height: 28px;
    line-height: 28px;
}
.main-nav a:hover,
.main-nav a.active {
    color: var(--color-white);
}
.main-nav a.active { font-weight: 500; }

/* Header Actions */
.header-actions { 
    display: flex; 
    align-items: center; 
    gap: 4px; 
}
.search-toggle {
    width: 34px; height: 34px;
    border-radius: var(--radius-full);
    display: flex; align-items: center; justify-content: center;
    color: rgba(255, 255, 255, 0.75);
    transition: all var(--transition-fast);
}
.search-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
}
.nav-toggle { 
    display: none; 
    flex-direction: column; 
    gap: 5px; 
    width: 34px; height: 34px;
    border-radius: var(--radius-sm);
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.75);
}
.nav-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}
.nav-toggle span {
    display: block; width: 17px; height: 1.5px;
    background: currentColor;
    border-radius: 2px;
    transition: all var(--transition);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Search Bar */
.search-bar {
    display: none;
    padding: 10px 0;
    animation: slideDown 0.25s ease;
}
.search-bar.open { display: block; }
.search-bar form {
    display: flex;
    gap: 0;
    max-width: 520px;
    margin: 0 auto;
}
.search-bar input {
    flex: 1;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-pill);
    padding: 9px 18px;
    color: var(--color-white);
    font-size: 14px;
    outline: none;
    transition: all var(--transition-fast);
}
.search-bar input:focus {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.3);
}
.search-bar input::placeholder { color: rgba(255, 255, 255, 0.4); }
.search-bar button {
    padding: 9px 14px;
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--transition-fast);
}
.search-bar button:hover { color: var(--color-white); }

/* ============================================================
   HERO / BANNER — Full-bleed product tile style
============================================================ */
.hero {
    position: relative;
    min-height: 520px;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding-top: var(--header-h);
    background: var(--color-bg-darker);
}
.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    background: linear-gradient(165deg, #000000 0%, #1d1d1f 45%, #272729 100%);
}
/* Subtle grid pattern overlay */
.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 1px 1px, rgba(255,255,255,0.03) 1px, transparent 0);
    background-size: 36px 36px;
    z-index: 1;
}
/* Ambient glow */
.hero-bg::after {
    content: '';
    position: absolute;
    top: 15%;
    right: 20%;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(0, 102, 204, 0.12) 0%, transparent 65%);
    border-radius: 50%;
    z-index: 2;
    pointer-events: none;
}
.hero-content {
    position: relative;
    z-index: 10;
    width: 100%;
}
/* Slider */
.hero-slider {
    position: relative;
    width: 100%;
    min-height: 480px;
    display: flex;
    align-items: center;
}
.slide {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    opacity: 0;
    transition: opacity 0.8s ease;
    pointer-events: none;
}
.slide.active { opacity: 1; pointer-events: auto; }
.slide-inner {
    width: 100%;
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: 0 24px;
}
.slide-tag {
    display: inline-block;
    font-size: 11px;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    color: var(--color-sky-link);
    margin-bottom: 18px;
    font-weight: 500;
}
.slide-title {
    font-family: var(--font-display);
    font-size: clamp(2.4rem, 5.5vw, 3.8rem);
    font-weight: 600;
    color: var(--color-white);
    line-height: 1.08;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    max-width: 680px;
}
.slide-title em {
    font-style: normal;
    color: var(--color-sky-link);
}
.slide-desc {
    font-size: 17px;
    color: var(--color-white-muted);
    max-width: 480px;
    margin-bottom: 34px;
    line-height: 1.55;
    font-weight: 300;
}
.slide-actions { 
    display: flex; 
    gap: 12px; 
    flex-wrap: wrap; 
}

/* Slider Controls */
.slider-controls {
    position: absolute;
    bottom: 36px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 8px;
}
.slider-dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.35);
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    padding: 0;
}
.slider-dot.active {
    width: 21px;
    border-radius: 4px;
    background: var(--color-sky-link);
}
.slider-arrows {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 12px;
    pointer-events: none;
    z-index: 20;
}
.slider-arrow {
    width: 42px; height: 42px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--color-white);
    display: flex; align-items: center; justify-content: center;
    pointer-events: auto;
    cursor: pointer;
    transition: all var(--transition);
}
.slider-arrow:hover {
    background: rgba(255, 255, 255, 0.16);
    border-color: rgba(255, 255, 255, 0.3);
}

/* ============================================================
   STATS BAR — Clean data strip
============================================================ */
.stats-bar {
    background: var(--color-bg-parchment);
    padding: 44px 0;
    border-top: 1px solid var(--color-divider);
    border-bottom: 1px solid var(--color-divider);
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
}
.stat-item {
    text-align: center;
    padding: 20px 16px;
    border-right: 1px solid var(--color-divider);
    position: relative;
}
.stat-item:last-child { border-right: none; }
.stat-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-ink);
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 6px;
}
.stat-number span { color: var(--color-primary); font-weight: 600; }
.stat-label {
    font-size: 12px;
    color: var(--color-ink-muted);
    letter-spacing: 0.01em;
    font-weight: 400;
}

/* ============================================================
   CORE ADVANTAGES — Utility card grid
============================================================ */
.advantages { 
    background: var(--color-bg-white); 
}
.adv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}
.adv-card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 32px 26px;
    transition: all var(--transition);
    position: relative;
}
.adv-card:hover {
    transform: scale(1.01);
    box-shadow: var(--shadow-subtle);
}
.adv-icon {
    width: 48px; height: 48px;
    background: var(--color-bg-parchment);
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 18px;
    color: var(--color-primary);
    transition: all var(--transition);
}
.adv-card:hover .adv-icon {
    background: var(--color-primary);
    color: var(--color-white);
}
.adv-title {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}
.adv-desc { 
    font-size: 14px; 
    color: var(--color-ink-muted); 
    line-height: 1.57; 
}

/* ============================================================
   PRODUCTS SHOWCASE — Store grid cards
============================================================ */
.products-showcase { 
    background: var(--color-bg-parchment); 
}
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}
.product-card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
}
.product-card:hover {
    transform: scale(1.01);
    box-shadow: var(--shadow-subtle);
}
.product-card-img {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: var(--color-bg-parchment);
}
.product-card-img img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}
.product-card:hover .product-card-img img { transform: scale(1.04); }
.product-cat-badge {
    position: absolute;
    top: 12px; left: 12px;
    background: var(--color-bg-dark);
    color: var(--color-white);
    font-size: 11px;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    letter-spacing: 0.02em;
}
.product-card-body { padding: 20px; }
.product-card-title {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: 6px;
    letter-spacing: -0.01em;
}
.product-card-desc {
    font-size: 14px;
    color: var(--color-ink-muted);
    line-height: 1.5;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.product-card-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 14px;
    font-weight: 400;
    color: var(--color-primary);
    transition: all var(--transition-fast);
}
.product-card-link:hover { gap: 8px; }
.product-card-link svg { 
    transition: transform var(--transition-fast); 
    width: 14px; height: 14px;
}
.product-card-link:hover svg { transform: translateX(3px); }

.more-btn-wrap { text-align: center; margin-top: 44px; }

/* ============================================================
   NEWS SECTION
============================================================ */
.news-section { 
    background: var(--color-bg-white); 
}
.news-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 18px;
}
.news-main-card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
}
.news-main-card:hover {
    box-shadow: var(--shadow-subtle);
}
.news-main-img {
    height: 240px;
    overflow: hidden;
    background: var(--color-bg-parchment);
}
.news-main-img img { 
    width: 100%; height: 100%; 
    object-fit: cover; 
    transition: transform 0.6s ease; 
}
.news-main-card:hover .news-main-img img { transform: scale(1.04); }
.news-card-body { padding: 26px; }
.news-cat {
    font-size: 11px;
    font-weight: 500;
    color: var(--color-primary);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: 8px;
}
.news-card-title {
    font-family: var(--font-display);
    font-size: 19px;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: 10px;
    line-height: 1.3;
    letter-spacing: -0.01em;
    transition: color var(--transition-fast);
}
.news-main-card:hover .news-card-title { color: var(--color-primary); }
.news-card-excerpt { 
    font-size: 14px; 
    color: var(--color-ink-muted); 
    line-height: 1.55; 
    margin-bottom: 16px; 
}
.news-card-meta {
    font-size: 12px;
    color: var(--color-ink-muted);
    display: flex;
    align-items: center;
    gap: 14px;
}
.news-list-side { 
    display: flex; 
    flex-direction: column; 
    gap: 12px; 
}
.news-list-item {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 16px;
    transition: all var(--transition);
    display: flex;
    gap: 14px;
    align-items: center;
}
.news-list-item:hover {
    border-color: var(--color-primary);
    transform: translateX(3px);
}
.news-list-date {
    flex-shrink: 0;
    width: 46px;
    text-align: center;
}
.news-list-day { 
    font-family: var(--font-display); 
    font-size: 1.5rem; 
    font-weight: 600; 
    color: var(--color-primary); 
    line-height: 1; 
    letter-spacing: -0.02em;
}
.news-list-month { 
    font-size: 11px; 
    color: var(--color-ink-muted); 
    margin-top: 2px;
}
.news-list-content { flex: 1; min-width: 0; }
.news-list-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-ink);
    line-height: 1.4;
    margin-bottom: 3px;
    transition: color var(--transition-fast);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-list-item:hover .news-list-title { color: var(--color-primary); }
.news-list-cat { font-size: 11px; color: var(--color-ink-muted); }

/* ============================================================
   PAGE HERO — Inner page headers
============================================================ */
.page-hero {
    padding: calc(var(--header-h) + 72px) 0 64px;
    background: var(--color-bg-dark);
    text-align: center;
    position: relative;
    overflow: hidden;
}
.page-hero::before {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 120px;
    background: linear-gradient(to top, var(--color-bg-parchment), transparent);
}
.page-hero > .container {
    position: relative;
    z-index: 1;
}
.page-hero-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 600;
    color: var(--color-white);
    line-height: 1.15;
    letter-spacing: -0.025em;
    margin-bottom: 12px;
}
.page-hero-desc { 
    font-size: 17px; 
    color: var(--color-white-muted); 
    max-width: 480px; 
    margin: 0 auto; 
    font-weight: 300;
}
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--color-white-muted);
    margin-bottom: 18px;
    justify-content: center;
}
.breadcrumb a { color: var(--color-sky-link); }
.breadcrumb a:hover { text-decoration: underline; }

/* Filter Bar */
.filter-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}
.filter-btn {
    padding: 7px 18px;
    border-radius: var(--radius-pill);
    font-size: 13px;
    font-weight: 400;
    color: var(--color-ink-soft);
    border: 1px solid var(--color-border-light);
    background: var(--color-bg-white);
    transition: all var(--transition);
}
.filter-btn:hover {
    border-color: var(--color-ink-muted);
    color: var(--color-ink);
}
.filter-btn.active {
    background: var(--color-ink);
    color: var(--color-white);
    border-color: var(--color-ink);
}

/* ============================================================
   PRODUCT DETAIL PAGE
============================================================ */
.product-detail-img {
    width: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-bg-parchment);
    margin-bottom: 36px;
}
.product-detail-img img { 
    width: 100%; 
    max-height: 480px; 
    object-fit: cover; 
}
.product-features { margin: 36px 0; }
.feature-list { display: flex; flex-direction: column; gap: 10px; margin-top: 18px; }
.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: var(--color-bg-parchment);
    border-radius: var(--radius-md);
}
.feature-icon { color: var(--color-primary); flex-shrink: 0; }
.params-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 18px;
    font-size: 14px;
}
.params-table th, .params-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--color-border-light);
}
.params-table th {
    background: var(--color-bg-parchment);
    color: var(--color-ink);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.params-table td { color: var(--color-ink-soft); }
.params-table tr:hover td { background: rgba(0, 102, 204, 0.03); }

/* ============================================================
   ABOUT US PAGE
============================================================ */
.about-intro { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 64px; 
    align-items: center; 
}
.about-intro-img {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-bg-parchment);
    min-height: 340px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.about-intro-img img { 
    width: 100%; 
    min-height: 340px;
    object-fit: cover;
}
.about-intro-text h2 {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: 20px;
    line-height: 1.2;
    letter-spacing: -0.02em;
}
.about-intro-text p { 
    color: var(--color-ink-soft); 
    line-height: 1.65; 
    margin-bottom: 16px; 
    font-size: 15px;
}

/* Timeline */
.timeline { 
    position: relative; 
    padding: 24px 0; 
}
.timeline::before {
    content: '';
    position: absolute;
    top: 0; bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    background: var(--color-border-light);
}
.timeline-item {
    display: flex;
    align-items: flex-start;
    gap: 40px;
    margin-bottom: 40px;
    position: relative;
}
.timeline-item:nth-child(odd) { flex-direction: row; }
.timeline-item:nth-child(even) { flex-direction: row-reverse; }
.timeline-content {
    flex: 1;
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: all var(--transition);
}
.timeline-content:hover {
    box-shadow: var(--shadow-subtle);
    border-color: var(--color-primary);
}
.timeline-year {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 6px;
    letter-spacing: -0.01em;
}
.timeline-title { 
    font-size: 16px; 
    font-weight: 600; 
    color: var(--color-ink); 
    margin-bottom: 8px; 
}
.timeline-desc { 
    font-size: 14px; 
    color: var(--color-ink-muted); 
    line-height: 1.55; 
}
.timeline-dot {
    position: absolute;
    left: 50%;
    top: 26px;
    transform: translateX(-50%);
    width: 12px; height: 12px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 3px solid var(--color-bg-parchment);
    z-index: 2;
}
.timeline-spacer { flex: 1; }

/* Honors Grid */
.honor-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}
.honor-card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
    text-align: center;
}
.honor-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-subtle);
}
.honor-card-img {
    height: 170px;
    overflow: hidden;
    background: var(--color-bg-parchment);
    display: flex;
    align-items: center;
    justify-content: center;
}
.honor-card-img img { max-height: 150px; object-fit: contain; padding: 10px; }
.honor-card-name {
    padding: 14px 12px;
    font-size: 13px;
    color: var(--color-ink-soft);
    border-top: 1px solid var(--color-border-light);
}

/* ============================================================
   NEWS LISTING / ARTICLE PAGES
============================================================ */
.news-page-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}
.news-page-card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}
.news-page-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-subtle);
}
.news-page-img { 
    height: 190px; 
    overflow: hidden; 
    background: var(--color-bg-parchment); 
}
.news-page-img img { 
    width: 100%; height: 100%; 
    object-fit: cover; 
    transition: transform 0.6s ease; 
}
.news-page-card:hover .news-page-img img { transform: scale(1.04); }
.news-page-body { 
    padding: 20px; 
    flex: 1; 
    display: flex; 
    flex-direction: column; 
}
.news-page-body .news-card-title { font-size: 16px; }
.news-page-body .news-card-excerpt { flex: 1; }

/* Article Detail */
.article-body {
    max-width: 720px;
    margin: 0 auto;
}
.article-header {
    margin-bottom: 36px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-border-light);
}
.article-title {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3.5vw, 2.2rem);
    font-weight: 600;
    color: var(--color-ink);
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -0.025em;
}
.article-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    color: var(--color-ink-muted);
    flex-wrap: wrap;
}
.article-content {
    font-size: 17px;
    color: var(--color-ink-soft);
    line-height: 1.65;
}
.article-content h2 { 
    font-family: var(--font-display);
    font-size: 1.6rem; 
    font-weight: 600; 
    color: var(--color-ink); 
    margin: 32px 0 14px; 
    letter-spacing: -0.02em;
}
.article-content h3 { 
    font-family: var(--font-display);
    font-size: 1.25rem; 
    font-weight: 600; 
    color: var(--color-ink); 
    margin: 24px 0 10px; 
}
.article-content p { margin-bottom: 18px; }
.article-content img { 
    border-radius: var(--radius-md); 
    margin: 24px 0; 
    width: 100%;
}
.article-content ul, .article-content ol { 
    padding-left: 20px; 
    margin-bottom: 18px; 
}
.article-content li { margin-bottom: 6px; }
.article-content blockquote {
    border-left: 3px solid var(--color-primary);
    padding: 14px 22px;
    background: var(--color-bg-parchment);
    color: var(--color-ink-muted);
    margin: 24px 0;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 15px;
}

/* ============================================================
   PAGINATION
============================================================ */
.pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 48px;
    flex-wrap: wrap;
}
.page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px; height: 36px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 400;
    color: var(--color-ink-soft);
    border: 1px solid var(--color-border-light);
    background: var(--color-bg-white);
    padding: 0 10px;
    transition: all var(--transition-fast);
}
.page-btn:hover, .page-btn.active {
    background: var(--color-ink);
    color: var(--color-white);
    border-color: var(--color-ink);
}

/* ============================================================
   CONTACT PAGE
============================================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 48px;
    align-items: start;
}
.contact-info-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    margin-bottom: 28px;
}
.contact-info-icon {
    width: 42px; height: 42px;
    background: var(--color-bg-parchment);
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    color: var(--color-primary);
    flex-shrink: 0;
}
.contact-info-text h4 { 
    font-size: 14px; 
    font-weight: 600; 
    color: var(--color-ink); 
    margin-bottom: 4px; 
}
.contact-info-text p { 
    font-size: 14px; 
    color: var(--color-ink-muted); 
}
.contact-form {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 36px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 20px; }
.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-ink-soft);
    margin-bottom: 8px;
}
.form-control {
    width: 100%;
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    padding: 11px 14px;
    color: var(--color-ink);
    font-size: 15px;
    outline: none;
    transition: border-color var(--transition-fast);
}
.form-control:focus { 
    border-color: var(--color-primary); 
    background: var(--color-bg-white);
}
.form-control::placeholder { color: var(--color-ink-muted); opacity: 0.6; }
textarea.form-control { resize: vertical; min-height: 120px; }

/* ============================================================
   FOOTER — Minimal parchment footer
============================================================ */
.site-footer {
    background: var(--color-bg-parchment);
    border-top: 1px solid var(--color-divider);
    margin-top: auto;
}
.footer-top { padding: 52px 0 36px; }
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 36px;
}
.footer-logo {
    display: flex; 
    align-items: center; 
    gap: 9px;
    font-family: var(--font-display);
    font-size: 15px; 
    font-weight: 600; 
    color: var(--color-ink);
    margin-bottom: 12px;
}
.footer-desc { 
    font-size: 13px; 
    color: var(--color-ink-muted); 
    line-height: 1.65; 
    margin-bottom: 18px; 
}
.footer-contact-item {
    display: flex; 
    align-items: center; 
    gap: 8px;
    font-size: 12px; 
    color: var(--color-ink-muted);
    margin-bottom: 8px;
}
.footer-contact-item a { 
    color: var(--color-ink-muted); 
    transition: color var(--transition-fast); 
}
.footer-contact-item a:hover { color: var(--color-primary); }
.footer-title {
    font-family: var(--font-display);
    font-size: 12px;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: 14px;
    letter-spacing: 0.01em;
}
.footer-links li { margin-bottom: 8px; }
.footer-links a {
    font-size: 12px;
    color: var(--color-ink-muted);
    line-height: 2.35;
    transition: color var(--transition-fast);
    display: block;
}
.footer-links a:hover { color: var(--color-primary); }
.footer-bottom {
    border-top: 1px solid var(--color-divider);
    padding: 18px 0;
    display: flex;
}
.footer-bottom .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}
.footer-bottom p { 
    font-size: 11px; 
    color: var(--color-ink-muted); 
}
.footer-bottom a { 
    color: var(--color-ink-muted); 
    transition: color var(--transition-fast); 
}
.footer-bottom a:hover { color: var(--color-primary); }

/* ============================================================
   DARK SURFACE VARIANTS (for sections on dark backgrounds)
   These override base styles when placed on dark tiles
============================================================ */

/* Dark section with light text */
.section-dark,
[data-theme="dark"] {
    background: var(--color-bg-dark);
    color: var(--color-white);
}
.section-dark .section-title,
[data-theme="dark"] .section-title {
    color: var(--color-white);
}
.section-dark .section-desc,
[data-theme="dark"] .section-desc {
    color: var(--color-white-muted);
}
.section-dark .section-tag,
[data-theme="dark"] .section-tag {
    color: var(--color-sky-link);
}
.section-dark .adv-card,
[data-theme="dark"] .adv-card {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--color-border-dark);
}
.section-dark .adv-title,
[data-theme="dark"] .adv-title {
    color: var(--color-white);
}
.section-dark .adv-desc,
[data-theme="dark"] .adv-desc {
    color: var(--color-white-muted);
}
.section-dark .btn-outline,
[data-theme="dark"] .btn-outline {
    @extend .btn-outline-light;
}

/* ============================================================
   ANIMATIONS
============================================================ */
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}
.animate-fadeup {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.65s ease, transform 0.65s ease;
}
.animate-fadeup.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Scanline removed in Apple edition — replaced by subtle dot pattern */

/* ============================================================
   RESPONSIVE DESIGN
   Breakpoints: 1440, 1068, 833, 734, 640, 480
============================================================ */

/* Small desktop adjustments */
@media (max-width: 1068px) {
    :root {
        --container-max: 900px;
    }
    .slide-title { font-size: clamp(2rem, 4.5vw, 3rem); }
    .product-grid,
    .adv-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .about-intro { grid-template-columns: 1fr; gap: 40px; }
    .timeline::before { left: 28px; }
    .timeline-item, .timeline-item:nth-child(even) { 
        flex-direction: column; 
        gap: 10px; 
        padding-left: 56px; 
    }
    .timeline-dot { left: 28px; top: 4px; }
    .timeline-spacer { display: none; }
    .honor-grid { grid-template-columns: repeat(3, 1fr); }
    .contact-grid { grid-template-columns: 1fr; }
}

/* Tablet landscape and below */
@media (max-width: 833px) {
    :root {
        --header-h: 52px;
    }
    .section { padding: 64px 0; }
    .main-nav { 
        display: none; 
        position: absolute; 
        top: var(--header-h); 
        left: 0; 
        right: 0; 
        background: rgba(0, 0, 0, 0.96);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: 16px 0; 
        z-index: 999; 
    }
    .main-nav.open { display: block; }
    .main-nav ul { 
        flex-direction: column; 
        gap: 0; 
    }
    .main-nav a { 
        padding: 12px 24px; 
        border-radius: 0; 
        font-size: 14px;
        height: auto;
        line-height: 1.4;
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .nav-toggle { display: flex; }
    .hero { min-height: 420px; }
    .hero-slider { min-height: 380px; }
}

/* Tablet portrait */
@media (max-width: 734px) {
    .section { padding: 56px 0; }
    .section-header { margin-bottom: 44px; }
    .stats-grid { 
        grid-template-columns: repeat(2, 1fr); 
    }
    .stats-grid .stat-item:nth-child(2) { border-right: none; }
    .stat-item { padding: 16px 12px; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .news-page-grid { grid-template-columns: 1fr; }
    .honor-grid { grid-template-columns: repeat(2, 1fr); }
    .form-row { grid-template-columns: 1fr; }
    .slide-title { font-size: 1.95rem; }
    .slide-actions { flex-direction: column; align-items: flex-start; }
    .slide-actions .btn { width: 100%; justify-content: center; }
}

/* Large phone */
@media (max-width: 640px) {
    .container { padding: 0 18px; }
    .adv-grid { grid-template-columns: 1fr; }
    .product-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .honor-grid { grid-template-columns: repeat(2, 1fr); }
}

/* Small phone */
@media (max-width: 419px) {
    .section { padding: 48px 0; }
    .page-hero { padding: calc(var(--header-h) + 48px) 0 48px; }
    .slide-tag { font-size: 10px; letter-spacing: 2px; }
    .slide-desc { font-size: 15px; }
}

/* Wide desktop — lock content at max */
@media (min-width: 1441px) {
    .container {
        padding: 0 32px;
    }
}