/* ==========================================================================
   景德镇自会食品有限公司 — 官网样式
   设计令牌：深绿 + 琥珀金 · 现代简约高级感
   ========================================================================== */

/* ---------- 设计令牌（CSS 变量）---------- */
:root {
    /* 品牌色 */
    --color-primary:        #1F3D2B;   /* 深绿 — 主色 */
    --color-primary-dark:   #142519;   /* 深绿加深（hover/文字反白） */
    --color-primary-soft:   #2D5439;   /* 深绿提亮 */
    --color-accent:         #D4A24C;   /* 琥珀金 — 点缀 */
    --color-accent-dark:    #B98734;   /* 琥珀金加深 */
    --color-accent-soft:    #F1DDB5;   /* 琥珀金淡化 */

    /* 中性色 */
    --color-bg:             #F7F4EC;   /* 米白 — 主背景 */
    --color-bg-warm:        #EFE9DA;   /* 米黄 — 辅助背景 */
    --color-surface:        #FFFFFF;   /* 卡片表面 */
    --color-text:           #2A2A2A;   /* 主文字 */
    --color-text-soft:      #5A5A5A;   /* 次文字 */
    --color-text-mute:      #8A8A8A;   /* 弱化文字 */
    --color-line:           #E2DCC9;   /* 描边 / 分隔线 */

    /* 语义 */
    --on-primary:           #F7F4EC;   /* 在主色上的前景 */
    --on-accent:            #1F3D2B;   /* 在点缀色上的前景 */
    --shadow-sm:  0 1px 2px rgba(31, 61, 43, .06), 0 2px 6px rgba(31, 61, 43, .04);
    --shadow-md:  0 4px 12px rgba(31, 61, 43, .08), 0 12px 32px rgba(31, 61, 43, .06);
    --shadow-lg:  0 12px 32px rgba(31, 61, 43, .14), 0 24px 64px rgba(31, 61, 43, .10);

    /* 字体 */
    --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
    --font-sans:  "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC",
                  "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

    /* 间距 / 圆角 / 动效 */
    --container-w:   1200px;
    --space-1:  4px;
    --space-2:  8px;
    --space-3:  16px;
    --space-4:  24px;
    --space-5:  32px;
    --space-6:  48px;
    --space-7:  64px;
    --space-8:  96px;
    --space-9:  128px;
    --radius-sm: 6px;
    --radius:    12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --ease:    cubic-bezier(.22, .61, .36, 1);
    --ease-out: cubic-bezier(.16, 1, .3, 1);
    --dur:    280ms;
    --dur-lg: 520ms;
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: 0; background: none; }
ul { list-style: none; padding: 0; margin: 0; }
input, textarea, button { font-family: inherit; font-size: inherit; }

h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 700;
    line-height: 1.2;
    margin: 0;
    letter-spacing: -.01em;
}
p { margin: 0; }

::selection { background: var(--color-accent); color: var(--color-primary); }

/* ---------- 通用容器 ---------- */
.container {
    width: 100%;
    max-width: var(--container-w);
    margin: 0 auto;
    padding: 0 var(--space-5);
}

/* ---------- 滚动渐显 ---------- */
.reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 800ms var(--ease-out), transform 800ms var(--ease-out);
    transition-delay: var(--reveal-delay, 0ms);
    will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-reveal="left"]  { transform: translate3d(-32px, 0, 0); }
.reveal[data-reveal="right"] { transform: translate3d( 32px, 0, 0); }
.reveal[data-reveal="left"].is-visible,
.reveal[data-reveal="right"].is-visible { transform: none; }
@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; transition: none; }
    html { scroll-behavior: auto; }
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 14px 26px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 15px;
    letter-spacing: .02em;
    transition: transform var(--dur) var(--ease),
                background var(--dur) var(--ease),
                color var(--dur) var(--ease),
                box-shadow var(--dur) var(--ease);
    white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; transition: transform var(--dur) var(--ease); }
.btn:hover { transform: translateY(-2px); }
.btn:hover svg { transform: translateX(4px); }

.btn-primary {
    background: var(--color-accent);
    color: var(--on-accent);
    box-shadow: 0 6px 20px rgba(212, 162, 76, .35);
}
.btn-primary:hover { background: var(--color-accent-dark); box-shadow: 0 10px 28px rgba(212, 162, 76, .5); }

.btn-ghost {
    background: transparent;
    color: var(--color-primary);
    border: 1.5px solid var(--color-primary);
}
.btn-ghost:hover { background: var(--color-primary); color: var(--on-primary); }

.btn-block { width: 100%; justify-content: center; padding: 16px 26px; }

/* ---------- 导航栏 ---------- */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: var(--space-3) 0;
    background: transparent;
    transition: background var(--dur) var(--ease),
                box-shadow var(--dur) var(--ease),
                padding var(--dur) var(--ease);
}
.navbar.is-scrolled {
    background: rgba(247, 244, 236, .85);
    backdrop-filter: saturate(160%) blur(14px);
    -webkit-backdrop-filter: saturate(160%) blur(14px);
    box-shadow: 0 1px 0 rgba(31, 61, 43, .08), 0 8px 24px rgba(31, 61, 43, .06);
    padding: var(--space-2) 0;
}
.nav-inner {
    display: flex;
    align-items: center;
    gap: var(--space-5);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--on-primary);
    transition: color var(--dur) var(--ease);
}
.navbar.is-scrolled .brand { color: var(--color-primary); }
.brand-mark {
    width: 44px; height: 44px;
    display: grid; place-items: center;
    background: var(--color-accent);
    color: var(--color-primary);
    font-family: var(--font-serif);
    font-weight: 900;
    font-size: 22px;
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(212, 162, 76, .35);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { font-family: var(--font-serif); font-weight: 700; font-size: 18px; }
.brand-tag  { font-size: 11px; opacity: .8; letter-spacing: .04em; }

.nav-menu {
    display: flex;
    gap: var(--space-5);
    margin-left: auto;
}
.nav-menu a {
    color: var(--on-primary);
    font-size: 14px;
    font-weight: 500;
    padding: var(--space-2) 0;
    position: relative;
    transition: color var(--dur) var(--ease);
}
.navbar.is-scrolled .nav-menu a { color: var(--color-text); }
.nav-menu a::after {
    content: "";
    position: absolute;
    left: 50%; bottom: 0;
    width: 0; height: 2px;
    background: var(--color-accent);
    transition: width var(--dur) var(--ease), left var(--dur) var(--ease);
}
.nav-menu a:hover { color: var(--color-accent); }
.nav-menu a:hover::after { width: 100%; left: 0; }
.navbar.is-scrolled .nav-menu a:hover { color: var(--color-primary-dark); }

.nav-cta {
    display: inline-flex;
    align-items: center;
    padding: 10px 22px;
    background: var(--color-accent);
    color: var(--color-primary);
    border-radius: 999px;
    font-weight: 600;
    font-size: 14px;
    transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.nav-cta:hover { background: var(--color-accent-dark); transform: translateY(-2px); }

/* 汉堡 */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px; height: 40px;
    border-radius: var(--radius-sm);
    transition: background var(--dur) var(--ease);
}
.hamburger:hover { background: rgba(255,255,255,.1); }
.navbar.is-scrolled .hamburger:hover { background: rgba(31, 61, 43, .06); }
.hamburger .bar {
    display: block;
    width: 22px; height: 2px;
    background: var(--on-primary);
    border-radius: 2px;
    transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease), background var(--dur) var(--ease);
}
.navbar.is-scrolled .hamburger .bar { background: var(--color-primary); }
.hamburger.is-active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.is-active .bar:nth-child(2) { opacity: 0; }
.hamburger.is-active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #1F3D2B 0%, #142519 55%, #0C1A11 100%);
    color: var(--on-primary);
    overflow: hidden;
    isolation: isolate;
    padding: 120px 0 80px;
}
.hero-bg { position: absolute; inset: 0; z-index: -1; overflow: hidden; }
.hero-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: .55;
}
.hero-shape-1 {
    width: 520px; height: 520px;
    background: radial-gradient(circle, rgba(212,162,76,.7), transparent 65%);
    top: -160px; right: -120px;
}
.hero-shape-2 {
    width: 460px; height: 460px;
    background: radial-gradient(circle, rgba(45,84,57,.9), transparent 65%);
    bottom: -180px; left: -100px;
}
.hero-grain {
    position: absolute; inset: 0;
    background-image:
        radial-gradient(rgba(255,255,255,.05) 1px, transparent 1px);
    background-size: 3px 3px;
    opacity: .35;
    mix-blend-mode: overlay;
}

.hero-inner {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    max-width: 920px;
}
.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 8px 18px;
    background: rgba(212, 162, 76, .12);
    border: 1px solid rgba(212, 162, 76, .35);
    border-radius: 999px;
    font-size: 13px;
    letter-spacing: .06em;
    color: var(--color-accent-soft);
    width: max-content;
}
.eyebrow-dot {
    width: 6px; height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(212, 162, 76, .25);
    animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 4px rgba(212, 162, 76, .25); }
    50%      { box-shadow: 0 0 0 8px rgba(212, 162, 76, .08); }
}
.hero-title {
    font-size: clamp(40px, 7vw, 84px);
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: -.02em;
}
.hero-title-accent {
    background: linear-gradient(135deg, var(--color-accent) 0%, #F1DDB5 60%, var(--color-accent-dark) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}
.hero-subtitle {
    font-family: var(--font-serif);
    font-size: clamp(20px, 2.2vw, 28px);
    font-weight: 500;
    color: var(--color-accent-soft);
}
.hero-description {
    font-size: 17px;
    max-width: 580px;
    color: rgba(247, 244, 236, .75);
}
.hero-buttons {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-3);
    flex-wrap: wrap;
}
.hero-buttons .btn-ghost {
    color: var(--on-primary);
    border-color: rgba(247, 244, 236, .5);
}
.hero-buttons .btn-ghost:hover {
    background: var(--on-primary);
    color: var(--color-primary);
}

.hero-metrics {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    margin-top: var(--space-6);
    padding-top: var(--space-5);
    border-top: 1px solid rgba(247, 244, 236, .12);
    flex-wrap: wrap;
}
.metric { display: flex; flex-direction: column; gap: 4px; }
.metric-num {
    font-family: var(--font-serif);
    font-size: 36px;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: -.02em;
    line-height: 1;
}
.metric-label {
    font-size: 13px;
    color: rgba(247, 244, 236, .65);
    letter-spacing: .04em;
}
.metric-divider {
    width: 1px; height: 36px;
    background: rgba(247, 244, 236, .18);
}

.hero-scroll {
    position: absolute;
    bottom: 32px; left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    color: rgba(247, 244, 236, .6);
    font-size: 11px;
    letter-spacing: .3em;
    animation: bounce 2.4s var(--ease) infinite;
}
.hero-scroll-line {
    width: 1px; height: 48px;
    background: linear-gradient(to bottom, rgba(247,244,236,.6), transparent);
}
@keyframes bounce {
    0%, 100% { transform: translate(-50%, 0); }
    50%      { transform: translate(-50%, 8px); }
}

/* ==========================================================================
   通用区段头
   ========================================================================== */
section { padding: var(--space-9) 0; }
.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto var(--space-8);
}
.section-eyebrow {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .25em;
    color: var(--color-accent-dark);
    text-transform: uppercase;
    margin-bottom: var(--space-3);
}
.section-title {
    font-size: clamp(30px, 4vw, 46px);
    color: var(--color-primary);
    margin-bottom: var(--space-3);
}
.section-subtitle {
    font-size: 17px;
    color: var(--color-text-soft);
}

/* ==========================================================================
   关于
   ========================================================================== */
.about { background: var(--color-bg); }
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-8);
    align-items: center;
}
.about-visual { position: relative; }
.about-card {
    position: relative;
    background: var(--color-primary);
    color: var(--on-primary);
    padding: var(--space-7) var(--space-6);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}
.about-card::after {
    content: "";
    position: absolute;
    width: 220px; height: 220px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(212, 162, 76, .35), transparent 70%);
    top: -80px; right: -80px;
}
.about-card-year {
    font-family: var(--font-serif);
    font-size: 96px;
    font-weight: 900;
    color: var(--color-accent);
    line-height: 1;
    letter-spacing: -.04em;
}
.about-card-label {
    margin-top: var(--space-3);
    font-size: 15px;
    color: rgba(247, 244, 236, .8);
    letter-spacing: .04em;
}
.about-card-divider {
    width: 40px; height: 2px;
    background: var(--color-accent);
    margin: var(--space-5) 0;
}
.about-card-quote {
    font-family: var(--font-serif);
    font-size: 22px;
    font-weight: 500;
    color: var(--color-accent-soft);
    line-height: 1.5;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
    margin-top: var(--space-4);
}
.about-stat {
    background: var(--color-surface);
    padding: var(--space-5);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-line);
    transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.about-stat:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.about-stat-num {
    font-family: var(--font-serif);
    font-size: 36px;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -.02em;
}
.about-stat-num span { color: var(--color-accent-dark); font-size: 18px; font-weight: 600; margin-left: 2px; }
.about-stat-label { font-size: 13px; color: var(--color-text-soft); margin-top: 4px; }

.about-text p { color: var(--color-text-soft); margin-bottom: var(--space-3); }
.about-lead {
    font-size: 18px;
    color: var(--color-text) !important;
    font-weight: 500;
}
.about-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-5);
}
.about-tags li {
    padding: 8px 16px;
    background: var(--color-bg-warm);
    color: var(--color-primary);
    border: 1px solid var(--color-line);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 500;
    transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.about-tags li:hover { background: var(--color-primary); color: var(--on-primary); }

/* ==========================================================================
   产品服务
   ========================================================================== */
.services { background: var(--color-bg-warm); }
.service-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
}
.service-card {
    position: relative;
    background: var(--color-surface);
    padding: var(--space-5);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-line);
    transition: transform var(--dur-lg) var(--ease),
                box-shadow var(--dur-lg) var(--ease),
                border-color var(--dur) var(--ease);
    overflow: hidden;
}
.service-card::before {
    content: "";
    position: absolute;
    inset: -1px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--color-accent) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--dur) var(--ease);
    z-index: -1;
}
.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.service-card:hover::before { opacity: .12; }
.service-icon {
    width: 56px; height: 56px;
    display: grid; place-items: center;
    background: var(--color-primary);
    color: var(--color-accent);
    border-radius: var(--radius);
    margin-bottom: var(--space-4);
    transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.service-icon svg { width: 28px; height: 28px; }
.service-card:hover .service-icon { background: var(--color-accent); color: var(--color-primary); }
.service-card h3 {
    font-size: 20px;
    color: var(--color-primary);
    margin-bottom: var(--space-3);
}
.service-card p {
    color: var(--color-text-soft);
    font-size: 14.5px;
    line-height: 1.65;
    margin-bottom: var(--space-4);
}
.service-features {
    display: flex;
    flex-direction: column;
    gap: 6px;
    border-top: 1px solid var(--color-line);
    padding-top: var(--space-3);
}
.service-features li {
    position: relative;
    padding-left: 18px;
    font-size: 13.5px;
    color: var(--color-text-soft);
}
.service-features li::before {
    content: "";
    position: absolute;
    left: 0; top: 9px;
    width: 6px; height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
}
.service-arrow {
    position: absolute;
    top: var(--space-4); right: var(--space-4);
    width: 36px; height: 36px;
    display: grid; place-items: center;
    background: var(--color-bg-warm);
    color: var(--color-primary);
    border-radius: 50%;
    font-size: 16px;
    opacity: 0;
    transform: translateX(-8px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.service-card:hover .service-arrow { opacity: 1; transform: translateX(0); background: var(--color-accent); }

/* ==========================================================================
   核心优势
   ========================================================================== */
.advantages { background: var(--color-primary); color: var(--on-primary); }
.advantages .section-eyebrow { color: var(--color-accent); }
.advantages .section-title { color: var(--on-primary); }
.advantages .section-subtitle { color: rgba(247, 244, 236, .65); }

.advantage-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
}
.advantage-item {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-5);
    background: rgba(247, 244, 236, .03);
    border: 1px solid rgba(247, 244, 236, .08);
    border-radius: var(--radius-lg);
    transition: background var(--dur) var(--ease),
                border-color var(--dur) var(--ease),
                transform var(--dur) var(--ease);
}
.advantage-item:hover {
    background: rgba(212, 162, 76, .08);
    border-color: rgba(212, 162, 76, .35);
    transform: translateX(4px);
}
.advantage-number {
    flex: 0 0 auto;
    font-family: var(--font-serif);
    font-size: 48px;
    font-weight: 900;
    line-height: 1;
    color: var(--color-accent);
    letter-spacing: -.04em;
    min-width: 60px;
}
.advantage-content h3 {
    font-size: 22px;
    color: var(--on-primary);
    margin-bottom: var(--space-2);
}
.advantage-content p {
    color: rgba(247, 244, 236, .7);
    font-size: 14.5px;
    line-height: 1.7;
}

/* ==========================================================================
   联系我们
   ========================================================================== */
.contact { background: var(--color-bg); }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-7);
    align-items: start;
}
.contact-info .section-title { text-align: left; margin-top: var(--space-3); }
.contact-info .section-eyebrow { text-align: left; }
.contact-lead {
    color: var(--color-text-soft);
    font-size: 16px;
    margin: var(--space-4) 0 var(--space-6);
    max-width: 460px;
}
.contact-list { display: flex; flex-direction: column; gap: var(--space-4); }
.contact-item {
    display: flex;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--color-surface);
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.contact-item:hover { border-color: var(--color-accent); transform: translateX(4px); }
.contact-icon {
    flex: 0 0 auto;
    width: 48px; height: 48px;
    display: grid; place-items: center;
    background: var(--color-primary);
    color: var(--color-accent);
    border-radius: var(--radius);
}
.contact-icon svg { width: 22px; height: 22px; }
.contact-text h3 {
    font-size: 14px;
    color: var(--color-text-mute);
    font-family: var(--font-sans);
    font-weight: 600;
    letter-spacing: .04em;
    margin-bottom: 4px;
}
.contact-text p {
    color: var(--color-primary);
    font-weight: 500;
}
.contact-time { font-size: 13px; color: var(--color-text-soft) !important; font-weight: 400 !important; margin-top: 2px; }

.contact-form-wrap {
    position: sticky;
    top: 100px;
}
.contact-form {
    background: var(--color-primary);
    color: var(--on-primary);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}
.contact-form::before {
    content: "";
    position: absolute;
    width: 200px; height: 200px;
    background: radial-gradient(circle, rgba(212, 162, 76, .25), transparent 70%);
    top: -100px; right: -100px;
    border-radius: 50%;
}
.form-title { font-size: 26px; color: var(--on-primary); }
.form-subtitle {
    color: rgba(247, 244, 236, .65);
    font-size: 14px;
    margin-top: var(--space-2);
    margin-bottom: var(--space-5);
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
}
.form-group { margin-bottom: var(--space-4); position: relative; z-index: 1; }
.form-group label {
    display: block;
    font-size: 13px;
    color: rgba(247, 244, 236, .75);
    margin-bottom: 6px;
    letter-spacing: .04em;
}
.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    background: rgba(247, 244, 236, .06);
    border: 1px solid rgba(247, 244, 236, .15);
    border-radius: var(--radius-sm);
    color: var(--on-primary);
    transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(247, 244, 236, .4); }
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    background: rgba(247, 244, 236, .1);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.contact-form .btn-primary { width: 100%; justify-content: center; }
.form-status {
    margin-top: var(--space-3);
    font-size: 13px;
    color: var(--color-accent);
    min-height: 18px;
    text-align: center;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.footer {
    background: var(--color-primary-dark);
    color: var(--on-primary);
    padding: var(--space-7) 0 var(--space-4);
}
.footer-top {
    display: grid;
    grid-template-columns: 1.2fr 2fr;
    gap: var(--space-7);
    padding-bottom: var(--space-6);
    border-bottom: 1px solid rgba(247, 244, 236, .1);
}
.footer-brand .brand { color: var(--on-primary); margin-bottom: var(--space-3); }
.footer-desc {
    color: rgba(247, 244, 236, .65);
    font-size: 14px;
    max-width: 360px;
}
.footer-cols {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
}
.footer-col h4 {
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .12em;
    color: var(--color-accent);
    margin-bottom: var(--space-3);
    text-transform: uppercase;
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col li {
    font-size: 14px;
    color: rgba(247, 244, 236, .75);
}
.footer-col a {
    transition: color var(--dur) var(--ease);
}
.footer-col a:hover { color: var(--color-accent); }

.footer-bottom {
    margin-top: var(--space-4);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-2);
    font-size: 13px;
    color: rgba(247, 244, 236, .55);
}
.footer-bottom a:hover { color: var(--color-accent); }
.icp { display: inline-flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.icp span { color: rgba(247, 244, 236, .3); }

/* ==========================================================================
   响应式 — 平板
   ========================================================================== */
@media (max-width: 1024px) {
    .service-grid { grid-template-columns: repeat(2, 1fr); }
    .advantage-grid { grid-template-columns: 1fr; }
    .about-grid { grid-template-columns: 1fr; gap: var(--space-6); }
    .about-visual { max-width: 480px; margin: 0 auto; }
    .footer-top { grid-template-columns: 1fr; gap: var(--space-5); }
}

/* ==========================================================================
   响应式 — 移动端
   ========================================================================== */
@media (max-width: 768px) {
    section { padding: var(--space-7) 0; }
    .container { padding: 0 var(--space-4); }

    /* 导航 */
    .nav-menu {
        position: fixed;
        top: 0; right: 0; bottom: 0; left: 0;
        width: 100vw;
        height: 100vh;
        flex-direction: column;
        gap: var(--space-4);
        justify-content: flex-start;
        margin: 0;
        padding: 100px var(--space-5) var(--space-5);
        background: var(--color-primary-dark);
        transform: translateX(100%);
        transition: transform var(--dur-lg) var(--ease);
        z-index: 90;
        overflow-y: auto;
    }
    .nav-menu.is-open { transform: translateX(0); }
    .nav-menu a {
        color: var(--on-primary) !important;
        font-size: 18px;
        padding: var(--space-3) 0;
        border-bottom: 1px solid rgba(247, 244, 236, .08);
    }
    .nav-menu a::after { display: none; }
    .nav-cta { display: none; }
    .hamburger { display: flex; z-index: 100; }
    .navbar.is-scrolled .hamburger .bar { background: var(--color-primary); }

    /* Hero */
    .hero { min-height: 88vh; padding: 100px 0 60px; }
    .hero-metrics { gap: var(--space-4); }
    .metric-num { font-size: 28px; }
    .metric-divider { display: none; }
    .hero-scroll { display: none; }
    .hero-buttons .btn { width: 100%; justify-content: center; }

    /* 卡片网格 */
    .service-grid { grid-template-columns: 1fr; }
    .advantage-item { padding: var(--space-4); }
    .advantage-number { font-size: 36px; min-width: 48px; }

    /* 联系区 */
    .contact-grid { grid-template-columns: 1fr; gap: var(--space-5); }
    .contact-form-wrap { position: static; }
    .form-row { grid-template-columns: 1fr; }
    .contact-form { padding: var(--space-5); }

    /* 页脚 */
    .footer-cols { grid-template-columns: 1fr 1fr; gap: var(--space-4); }
    .footer-bottom { justify-content: center; text-align: center; }
}

@media (max-width: 480px) {
    .brand-tag { display: none; }
    .brand-mark { width: 38px; height: 38px; font-size: 18px; }
    .footer-cols { grid-template-columns: 1fr; }
}