* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; border-radius: 0 !important; }
:root {
    --bg: #ffffff; --bg-light: #f8fafc; --bg-gray: #f1f5f9;
    --blue-dark: #0f172a; --blue-cyan: #0ea5e9; --blue-light: #e0f2fe;
    --text: #334155; --text-secondary: #64748b; --border: #e2e8f0;
    --grid-line: rgba(15, 23, 42, 0.02);
    --shadow-soft: 0 4px 20px rgba(0,0,0,0.03); --shadow-hover: 0 20px 40px rgba(0,0,0,0.08);
    --font-sans: -apple-system, "SF Pro Display", "PingFang SC", sans-serif;
    --font-tech: 'Rajdhani', sans-serif; --font-mono: 'JetBrains Mono', monospace;
}
::-webkit-scrollbar { width: 4px; } ::-webkit-scrollbar-track { background: transparent; } ::-webkit-scrollbar-thumb { background: rgba(15,23,42,0.15); }
html { scroll-behavior: smooth; }
body { font-family: var(--font-sans); background: var(--bg); color: var(--text); line-height: 1.6; overflow-x: hidden; -webkit-font-smoothing: antialiased; }
body::before { content: ""; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-image: linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px); background-size: 40px 40px; z-index: -1; }
a { text-decoration: none; color: inherit; }

/* 导航 */
.unav-header { background: rgba(255,255,255,0.95); padding: 0; position: sticky; top: 0; z-index: 1001; backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.unav-inner { max-width: 1400px; margin: 0 auto; padding: 0 24px; display: flex; justify-content: space-between; align-items: center; height: 64px; }
.unav-logo { color: var(--blue-dark); font-size: 18px; font-weight: 800; letter-spacing: 0.5px; text-decoration: none; display: flex; align-items: center; gap: 12px; flex-shrink: 0; font-family: var(--font-tech); text-transform: uppercase; }
.unav-logo img { display: block; flex-shrink: 0; filter: contrast(1.2); }
.unav-logo span { font-size: 12px; color: var(--text-secondary); font-family: var(--font-sans); margin-left: 8px; font-weight: 600; text-transform: none; letter-spacing: 0; }
.unav-nav { display: flex; gap: 32px; }
.unav-nav a { color: var(--text-secondary); font-size: 14px; font-weight: 600; transition: .2s; position: relative; font-family: var(--font-sans); white-space: nowrap; }
.unav-nav a:hover { color: var(--blue-dark); }
.unav-nav a.active { color: var(--blue-dark); font-weight: 700; }
.unav-nav a.active:after { content: ""; position: absolute; left: 0; bottom: -21px; width: 100%; height: 2px; background: var(--blue-cyan); }
.unav-phone { color: var(--blue-cyan); font-size: 14px; font-weight: 800; letter-spacing: 0.5px; padding: 6px 16px; background: var(--blue-light); border: 1px solid rgba(14,165,233,0.2); transition: all .2s; font-family: var(--font-sans); white-space: nowrap; }
.unav-phone:hover { background: var(--blue-cyan); color: #fff; }
.unav-hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.unav-hamburger span { display: block; width: 22px; height: 2px; background: var(--blue-dark); transition: .3s; }
.unav-mob { display: none; position: fixed; inset: 0; z-index: 1000; }
.unav-mob.open { display: block; }
.unav-mob-backdrop { position: absolute; inset: 0; background: rgba(15,23,42,.3); opacity: 0; transition: opacity .3s; backdrop-filter: blur(4px); }
.unav-mob.open .unav-mob-backdrop { opacity: 1; }
.unav-mob-panel { position: absolute; top: 0; left: 0; right: 0; background: #ffffff; transform: translateY(-100%); transition: transform .4s cubic-bezier(.165,.84,.44,1); padding-top: 72px; padding-bottom: 24px; box-shadow: 0 10px 30px rgba(0,0,0,.05); border-bottom: 1px solid var(--border); }
.unav-mob.open .unav-mob-panel { transform: translateY(0); }
.unav-mob-panel a { display: flex; align-items: center; justify-content: space-between; color: var(--blue-dark); font-size: 15px; font-weight: 600; padding: 16px 32px; border-bottom: 1px dashed var(--border); text-decoration: none; font-family: var(--font-sans); }
.unav-mob-tel { display: flex !important; align-items: center !important; gap: 10px; margin: 24px 32px 0 !important; padding: 14px 20px !important; background: var(--bg-gray) !important; border: 1px solid var(--border) !important; color: var(--blue-dark) !important; font-size: 14px !important; font-weight: 700 !important; font-family: var(--font-mono) !important; justify-content: center !important; }
@media(max-width:768px) { .unav-hamburger { display: flex; } .unav-nav, .unav-phone { display: none; } }

/* 布局 */
.container { max-width: 1400px; margin: 0 auto; padding: 0 24px; }
.sec-pad { padding: 80px 0; }
.bg-light { background: var(--bg-light); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.sec-header { margin-bottom: 48px; text-align: center; }
.eyebrow { font-size: 12px; font-weight: 800; letter-spacing: 2px; text-transform: uppercase; color: var(--blue-cyan); margin-bottom: 8px; font-family: var(--font-sans); display: block; }
.sec-title { font-size: clamp(28px, 3vw, 36px); font-weight: 800; color: var(--blue-dark); line-height: 1.2; font-family: var(--font-sans); margin-bottom: 16px; }
.sec-desc { font-size: 15px; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

/* 按钮 */
.btn-primary, .btn-outline { display: inline-flex; justify-content: center; align-items: center; padding: 12px 28px; font-size: 14px; font-weight: 700; letter-spacing: 1px; min-width: 140px; transition: all 0.3s; cursor: pointer; }
.btn-primary { background: var(--blue-dark); color: #fff; border: 1px solid var(--blue-dark); }
.btn-primary:hover { background: var(--blue-cyan); border-color: var(--blue-cyan); transform: translateY(-2px); box-shadow: 0 8px 16px rgba(14,165,233,0.2); }
.btn-outline { background: #fff; border: 1px solid var(--border); color: var(--blue-dark); }
.btn-outline:hover { border-color: var(--blue-dark); transform: translateY(-2px); }

/* 页面 Hero */
.page-hero { padding: 60px 0 48px; background: var(--bg-light); border-bottom: 1px solid var(--border); }
.page-hero h1 { font-size: clamp(28px, 4vw, 44px); font-weight: 800; color: var(--blue-dark); margin-bottom: 12px; }
.page-hero p { font-size: 15px; color: var(--text-secondary); max-width: 560px; margin-top: 8px; }
.page-breadcrumb { font-size: 13px; color: var(--text-secondary); margin-bottom: 12px; }
.page-breadcrumb a { color: var(--blue-cyan); }

/* 工艺卡片 */
.cap-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 2px; background: var(--border); border: 1px solid var(--border); }
.cap-card { background: var(--bg); transition: box-shadow .3s; display: flex; flex-direction: column; }
.cap-card:hover { box-shadow: 0 20px 40px rgba(0,0,0,0.08); z-index: 1; }
.cap-img { height: 220px; background-size: cover; background-position: center; position: relative; }
.cap-tag { position: absolute; top: 16px; left: 16px; background: var(--blue-dark); color: #fff; font-size: 11px; font-weight: 800; letter-spacing: 1.5px; padding: 4px 10px; font-family: var(--font-mono); }
.cap-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.cap-title { font-size: 17px; font-weight: 800; color: var(--blue-dark); margin-bottom: 6px; }
.cap-price { font-size: 12px; font-weight: 700; color: var(--blue-cyan); letter-spacing: 1px; text-transform: uppercase; margin-bottom: 12px; }
.cap-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; flex: 1; }
.cap-list { display: flex; flex-direction: column; gap: 6px; }
.cap-list-item { font-size: 13px; color: var(--text); font-weight: 600; }

/* 材料卡片 */
.dbgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 2px; background: var(--border); border: 1px solid var(--border); }
.dcard { background: var(--bg); display: flex; flex-direction: column; transition: box-shadow .3s; }
.dcard:hover { box-shadow: 0 20px 40px rgba(0,0,0,0.08); z-index: 1; }
.dcard-img-wrap { position: relative; }
.dcard-img { height: 180px; background-size: cover; background-position: center; }
.dc-price { position: absolute; top: 12px; right: 12px; background: var(--blue-cyan); color: #fff; font-size: 11px; font-weight: 800; padding: 3px 10px; }
.dcard-body { padding: 20px; flex: 1; }
.dcard-head { margin-bottom: 14px; }
.dc-tech { font-size: 11px; font-weight: 800; color: var(--blue-cyan); letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 4px; }
.dc-name { font-size: 16px; font-weight: 800; color: var(--blue-dark); }
.dcard-params { display: flex; flex-direction: column; gap: 8px; margin-bottom: 14px; }
.dparam { display: flex; justify-content: space-between; font-size: 13px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.dparam-k { color: var(--text-secondary); font-weight: 600; }
.dparam-v { color: var(--blue-dark); font-weight: 700; font-family: var(--font-mono); font-size: 12px; }
.dcard-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.dtag { background: var(--bg-gray); color: var(--text-secondary); font-size: 11px; font-weight: 700; padding: 3px 10px; }

/* 图库 */
.gallery-filter-wrap { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }
.g-filter { padding: 8px 20px; font-size: 13px; font-weight: 700; color: var(--text-secondary); border: 1px solid var(--border); cursor: pointer; transition: all .2s; user-select: none; }
.g-filter.active, .g-filter:hover { background: var(--blue-dark); color: #fff; border-color: var(--blue-dark); }
.gallery-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2px; }
.g-item { position: relative; overflow: hidden; aspect-ratio: 1; cursor: pointer; background: var(--bg-gray); }
.g-item.g-large { grid-column: span 2; grid-row: span 2; }
.g-item.g-wide { grid-column: span 2; }
.g-item img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .4s; }
.g-item:hover img { transform: scale(1.05); }
.g-info { position: absolute; bottom: 0; left: 0; right: 0; padding: 16px; background: linear-gradient(transparent, rgba(15,23,42,0.85)); color: #fff; transform: translateY(100%); transition: transform .3s; }
.g-item:hover .g-info { transform: translateY(0); }
.g-industry { font-size: 10px; font-weight: 800; letter-spacing: 1.5px; text-transform: uppercase; color: var(--blue-cyan); display: block; margin-bottom: 4px; }
.g-tag { font-size: 11px; font-family: var(--font-mono); opacity: 0.7; margin-bottom: 4px; }
.g-title { font-size: 14px; font-weight: 700; }
@media(max-width:768px) { .gallery-grid { grid-template-columns: repeat(2,1fr); } .g-item.g-large { grid-column: span 2; } }

/* 工艺对比表 */
.compare-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.compare-table th { background: var(--blue-dark); color: #fff; padding: 14px 16px; text-align: left; font-weight: 700; font-size: 13px; letter-spacing: 0.5px; }
.compare-table td { padding: 12px 16px; border-bottom: 1px solid var(--border); color: var(--text); }
.compare-table tr:nth-child(even) td { background: var(--bg-light); }
.compare-table tr:hover td { background: var(--blue-light); }
.tag-rec { background: var(--blue-cyan); color: #fff; font-size: 11px; font-weight: 800; padding: 2px 8px; letter-spacing: 0.5px; display: inline-block; }

/* 联系页 */
.contact-box { text-align: center; padding: 80px 40px; background: var(--bg); border: 1px solid var(--border); max-width: 700px; margin: 0 auto; }
.contact-title { font-size: clamp(24px,3vw,36px); font-weight: 800; color: var(--blue-dark); margin-bottom: 16px; }
.contact-desc { font-size: 15px; color: var(--text-secondary); margin-bottom: 32px; }
.contact-phone { font-size: clamp(28px,4vw,48px); font-weight: 800; color: var(--blue-dark); letter-spacing: 2px; font-family: var(--font-mono); margin-bottom: 32px; }
.contact-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.contact-info-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px,1fr)); gap: 24px; margin-top: 60px; }
.contact-info-card { padding: 28px; border: 1px solid var(--border); background: var(--bg); }
.contact-info-card h3 { font-size: 16px; font-weight: 800; color: var(--blue-dark); margin-bottom: 8px; }
.contact-info-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* 底部移动导航 */
.mob-bottom-nav { display: none; position: fixed; bottom: 0; left: 0; right: 0; background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); border-top: 1px solid var(--border); z-index: 998; padding-bottom: env(safe-area-inset-bottom,0px); }
.mob-bottom-nav-inner { display: grid; grid-template-columns: repeat(4, 1fr); }
.mob-nav-item { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 10px 4px 8px; gap: 3px; color: var(--text-secondary); font-size: 10px; font-weight: 600; transition: color .2s; border: none; background: none;
text-decoration: none; }
.mob-nav-item svg { width: 22px; height: 22px; stroke: currentColor; }
.mob-nav-item.active, .mob-nav-item:hover { color: var(--blue-cyan); }
@media(max-width:768px) { .mob-bottom-nav { display: block; } body { padding-bottom: 70px; } }
.footer { padding: 40px 0; border-top: 1px solid var(--border); text-align: center; }
.footer p { font-size: 13px; color: var(--text-secondary); line-height: 2; }