/* ==========================================================================
   base.css —— reset + 布局 + 通用组件
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; overflow-x: clip; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
/* Lenis 平滑滚动要求 */
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-stopped { overflow: hidden; }

h1, h2, h3, h4, p, figure, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, video, canvas, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
::selection { background: var(--brand); color: #fff; }

/* 滚动条 */
::-webkit-scrollbar { width: 9px; }
::-webkit-scrollbar-track { background: var(--paper-2); }
::-webkit-scrollbar-thumb { background: var(--ink-3); border-radius: 9px; }
::-webkit-scrollbar-thumb:hover { background: var(--brand); }

/* ---------- 布局工具 ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--pad-x); }
.sec { position: relative; padding-block: var(--sec-y); }
.sec--dark { background: var(--grad-dark); color: var(--on-dark); }
.sec--soft { background: var(--paper-2); }
.sec--flush { padding-block: 0; }
.row { display: flex; gap: var(--gap); }
.row--between { justify-content: space-between; }
.row--center { align-items: center; }
.grid { display: grid; gap: var(--gap); }
/* 关键：网格/弹性子项默认 min-width:auto 会被超宽内容（如 Swiper）撑大轨道，
   导致整页横向溢出。统一允许收缩，配合各容器自身的 overflow 裁切。 */
.grid > *, .row > * { min-width: 0; }
.g-2 { grid-template-columns: repeat(2, 1fr); }
.g-3 { grid-template-columns: repeat(3, 1fr); }
.g-4 { grid-template-columns: repeat(4, 1fr); }
.mt-1 { margin-top: 12px; } .mt-2 { margin-top: 24px; }
.mt-3 { margin-top: 40px; } .mt-4 { margin-top: 64px; }

/* ---------- 排版组件 ---------- */
/* 可读性：标题优雅换行 + 段落避免孤字（渐进增强，旧浏览器忽略） */
.h1, .h2, .h3, .hero__t { text-wrap: balance; }
.lead, .hero__sub, .muted { text-wrap: pretty; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font: 600 0.95rem/1 var(--font-mono);
  letter-spacing: 0.22em; text-transform: uppercase; color: var(--brand);
}
.eyebrow::before {
  content: ""; width: 30px; height: 1px; background: currentColor; opacity: .6;
}
.sec--dark .eyebrow { color: var(--brand-2); }

.h1 { font: 700 var(--fs-h1)/1.14 var(--font-display); letter-spacing: -0.02em; }
.h2 { font: 700 var(--fs-h2)/1.2 var(--font-display); letter-spacing: -0.015em; }
.h3 { font: 600 var(--fs-h3)/1.35 var(--font-display); }
.lead { font-size: var(--fs-lead); color: var(--ink-2); max-width: 62ch; }
.sec--dark .lead { color: var(--on-dark-2); }
.muted { color: var(--ink-3); font-size: var(--fs-sm); }
.sec--dark .muted { color: var(--on-dark-3); }
.grad-text {
  background: var(--grad-brand); -webkit-background-clip: text;
  background-clip: text; color: transparent;
}
.sec-head { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--gap); flex-wrap: wrap; margin-bottom: clamp(36px, 5vw, 72px); }

/* ---------- 按钮 ---------- */
.btn {
  position: relative; display: inline-flex; align-items: center; gap: 12px;
  padding: 15px 30px; border-radius: var(--r-pill);
  font-weight: 600; font-size: var(--fs-sm); letter-spacing: .02em;
  overflow: hidden; isolation: isolate; will-change: transform;
  transition: color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.btn__t { position: relative; z-index: 2; }
.btn::before {   /* 常态底 */
  content: ""; position: absolute; inset: 0; z-index: 0;
  background: var(--grad-brand);
}
.btn::after {    /* hover 时从下方升起的覆盖层 */
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: var(--ink); transform: translateY(101%);
  transition: transform var(--dur) var(--ease);
}
.btn:hover::after { transform: translateY(0); }
.btn { color: #fff; box-shadow: var(--sh-brand); }
.btn:hover { box-shadow: var(--sh-2); }

.btn--ghost { color: var(--ink); box-shadow: none; border: 1px solid var(--line); }
.btn--ghost::before { background: transparent; }
.btn--ghost::after { background: var(--ink); }
.btn--ghost:hover { color: #fff; box-shadow: none; }
.sec--dark .btn--ghost { color: var(--on-dark); border-color: var(--line-dark); }
.sec--dark .btn--ghost::after { background: var(--brand); }

.btn__ico {
  position: relative; z-index: 2; width: 18px; height: 18px;
  transition: transform var(--dur-fast) var(--ease);
}
.btn:hover .btn__ico { transform: translateX(5px); }

/* 文字链接：下划线由左向右扫过 */
.tlink { position: relative; display: inline-block; font-weight: 600; }
.tlink::after {
  content: ""; position: absolute; left: 0; bottom: -3px; width: 100%; height: 1.5px;
  background: currentColor; transform: scaleX(0); transform-origin: right;
  transition: transform var(--dur) var(--ease);
}
.tlink:hover::after { transform: scaleX(1); transform-origin: left; }

/* ---------- 卡片 ---------- */
.card {
  position: relative; padding: clamp(24px, 2.6vw, 40px);
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--r-lg); overflow: hidden;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.card::before {   /* hover 时从底部铺开的色块 */
  content: ""; position: absolute; inset: auto 0 0 0; height: 100%;
  background: var(--grad-dark); transform: scaleY(0); transform-origin: bottom;
  transition: transform var(--dur) var(--ease); z-index: 0;
}
.card > * { position: relative; z-index: 1; }
.card:hover { transform: translateY(-8px); box-shadow: var(--sh-2); border-color: transparent; }
.card:hover::before { transform: scaleY(1); }
.card:hover, .card:hover .lead, .card:hover .muted { color: var(--on-dark); }
.card__no { font: 600 var(--fs-xs)/1 var(--font-mono); color: var(--brand); letter-spacing: .2em; }
.card:hover .card__no { color: var(--brand-2); }

/* ---------- 图片容器（视差/揭幕用） ---------- */
.figure { position: relative; overflow: hidden; border-radius: var(--r-lg); background: var(--paper-3); }
.figure > .ph { position: absolute; inset: -12% 0; width: 100%; height: 124%; }
.figure--16x9 { aspect-ratio: 16 / 9; }
.figure--4x3  { aspect-ratio: 4 / 3; }
.figure--1x1  { aspect-ratio: 1 / 1; }
.figure--3x4  { aspect-ratio: 3 / 4; }

/* 程序化占位视觉：无外部图片依赖，客户换图时把 .ph 换成 <img> 即可 */
.ph {
  --c1: var(--brand); --c2: var(--brand-deep);
  background:
    radial-gradient(120% 90% at 18% 12%, color-mix(in srgb, var(--c1) 82%, transparent) 0%, transparent 58%),
    radial-gradient(110% 100% at 88% 82%, color-mix(in srgb, var(--c2) 88%, transparent) 0%, transparent 62%),
    linear-gradient(150deg, #131a26 0%, #0a0f18 100%);
}
.ph::after {   /* 网格质感，模拟工业感照片 */
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.07) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(120% 90% at 50% 40%, #000 20%, transparent 78%);
}
.ph--2 { --c1: var(--brand-2); --c2: #123; }
.ph--3 { --c1: #5b6cff; --c2: #08243f; }
.ph--4 { --c1: #00b3ff; --c2: #0b2340; }
.figure__tag {
  position: absolute; left: 18px; bottom: 16px; z-index: 3;
  padding: 7px 14px; border-radius: var(--r-pill); color: #fff;
  font: 600 var(--fs-xs)/1 var(--font-mono); letter-spacing: .12em;
  background: rgba(0,0,0,.42); backdrop-filter: blur(9px);
}

/* ---------- 导航 ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 90; height: var(--nav-h);
  display: flex; align-items: center;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease),
              backdrop-filter var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.nav__in { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.nav.is-hidden { transform: translateY(-102%); }
.nav.is-solid {
  background: rgba(255,255,255,.86); backdrop-filter: blur(16px) saturate(1.5);
  box-shadow: 0 1px 0 var(--line); color: var(--ink);
}
.nav.is-top { color: #fff; }
.logo { display: flex; align-items: center; gap: 11px; font: 700 1.05rem/1 var(--font-display); letter-spacing: -.01em; }
.logo__m {
  width: 30px; height: 30px; border-radius: 9px; background: var(--grad-brand);
  display: grid; place-items: center; color: #fff; font-size: 15px; font-weight: 800;
  box-shadow: var(--sh-brand);
}
.menu { display: flex; align-items: center; gap: clamp(18px, 2.3vw, 40px); }
.menu a { position: relative; font-size: 1rem; font-weight: 600; padding-block: 8px; }
.menu a::after {
  content: ""; position: absolute; left: 0; bottom: 2px; width: 100%; height: 1.5px;
  background: currentColor; transform: scaleX(0); transform-origin: right;
  transition: transform var(--dur) var(--ease);
}
.menu a:hover::after { transform: scaleX(1); transform-origin: left; }
.nav__right { display: flex; align-items: center; gap: 16px; }

/* 汉堡 */
.burger { display: none; width: 42px; height: 42px; position: relative; z-index: 120; }
.burger i {
  position: absolute; left: 10px; width: 22px; height: 1.8px; background: currentColor;
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast);
}
.burger i:nth-child(1) { top: 16px; }
.burger i:nth-child(2) { top: 23px; }
.burger.is-on i:nth-child(1) { transform: translateY(3.5px) rotate(45deg); }
.burger.is-on i:nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }

/* 全屏菜单 */
.overmenu {
  position: fixed; inset: 0; z-index: 110; background: var(--grad-dark); color: var(--on-dark);
  display: grid; place-items: center; clip-path: inset(0 0 100% 0); pointer-events: none;
}
.overmenu.is-open { pointer-events: auto; }
.overmenu__list { text-align: center; }
.overmenu__list li { overflow: hidden; }
.overmenu__list a {
  display: block; padding: 6px 0; font: 700 clamp(2rem, 7vw, 4.4rem)/1.16 var(--font-display);
  letter-spacing: -.02em; transform: translateY(110%);
}
.overmenu__list a:hover { color: var(--brand-2); }

/* ---------- 开屏 Loading ---------- */
.loader { position: fixed; inset: 0; z-index: 999; pointer-events: none; }
.loader__cols { position: absolute; inset: 0; display: flex; }
.loader__cols span { flex: 1; background: var(--ink); }
.loader__in {
  position: absolute; inset: 0; z-index: 2;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 26px;
  color: #fff;
}
.loader__word { display: flex; gap: .02em; color: #fff; --fill: 0%; }
.loader__word .ch {
  position: relative; display: block;
  font: 800 clamp(2.4rem, 8vw, 5.6rem)/1 var(--font-display);
  letter-spacing: -.04em;
  color: rgba(255, 255, 255, .13);           /* 空态：暗淡描边感 */
}
/* 注水层：渐变填字，clip-path 从下往上揭开，--fill 由加载进度驱动 (0%→100%) */
.loader__word .ch::before {
  content: attr(data-ch);
  position: absolute; left: 0; top: 0;
  background: linear-gradient(to top, var(--brand) 0%, var(--brand-deep) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  clip-path: inset(calc(100% - var(--fill)) 0 0 0);
}
.loader__bar { width: min(320px, 54vw); height: 2px; background: rgba(255,255,255,.16); overflow: hidden; }
.loader__bar i { display: block; height: 100%; width: 0%; background: var(--grad-brand); }
.loader__num { font: 600 var(--fs-sm)/1 var(--font-mono); color: rgba(255,255,255,.62); letter-spacing: .12em; }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 100svh; display: flex; align-items: flex-end; overflow: hidden; color: #fff; }
.hero__bg { position: absolute; inset: 0; z-index: 0; background: var(--grad-dark); }
.hero__cv { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero__glow {
  position: absolute; z-index: 1; width: 78vw; height: 78vw; max-width: 1000px; max-height: 1000px;
  left: 50%; top: 32%; transform: translate(-50%, -50%);
  background: radial-gradient(circle, color-mix(in srgb, var(--brand) 40%, transparent) 0%, transparent 62%);
  filter: blur(46px); pointer-events: none;
}
.hero__in { position: relative; z-index: 3; width: 100%; padding-bottom: clamp(56px, 9vh, 116px); padding-top: calc(var(--nav-h) + 40px); }
.hero__t { font: 800 var(--fs-hero)/0.98 var(--font-display); letter-spacing: -0.035em; }
.hero__t em { font-style: normal; }
.hero__foot { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--gap); flex-wrap: wrap; margin-top: clamp(28px, 4vh, 56px); }
.hero__sub { max-width: 46ch; color: rgba(255,255,255,.72); font-size: var(--fs-lead); }
.hero__meta { display: flex; gap: clamp(22px, 3vw, 54px); }
.hero__meta div b { display: block; font: 700 1.7rem/1 var(--font-display); }
.hero__meta div span { font-size: 0.9rem; font-weight: 600; color: rgba(255,255,255,.88); letter-spacing: .05em; text-transform: uppercase; }
.scroll-cue {
  position: absolute; left: 50%; bottom: 22px; z-index: 4; transform: translateX(-50%);
  display: grid; place-items: center; gap: 8px; color: rgba(255,255,255,.85);
  font: 500 0.86rem/1 var(--font-mono); letter-spacing: .18em;
}
.scroll-cue i { display: block; width: 1px; height: 46px; background: linear-gradient(rgba(255,255,255,.55), transparent); }

/* ---------- 数字 ---------- */
.stat b { display: block; font: 700 var(--fs-num)/1 var(--font-display); letter-spacing: -.03em; }
.stat b span { font-size: .42em; margin-left: 4px; font-weight: 600; }
.stat p { font-size: var(--fs-sm); color: var(--ink-3); margin-top: 8px; }
.sec--dark .stat p { color: var(--on-dark-3); }
.stat--brand b { background: var(--grad-brand); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------- 横向 pin ---------- */
.pinx { position: relative; background: var(--grad-dark); color: var(--on-dark); overflow: hidden; }
.pinx__vp { height: 100svh; display: flex; align-items: center; }
.pinx__track { display: flex; gap: clamp(20px, 2.4vw, 44px); padding-inline: var(--pad-x); will-change: transform; }
.pinx__card { position: relative; flex: 0 0 clamp(280px, 30vw, 470px); border-radius: var(--r-lg); overflow: hidden; }
.pinx__card .figure { border-radius: var(--r-lg); }
.pinx__cap { position: absolute; inset: auto 0 0 0; z-index: 3; padding: 26px; background: linear-gradient(transparent, rgba(0,0,0,.78)); }
.pinx__lead { flex: 0 0 clamp(260px, 26vw, 420px); display: grid; align-content: center; gap: 18px; }
.pinx__idx { font: 600 var(--fs-xs)/1 var(--font-mono); color: var(--brand-2); letter-spacing: .2em; }

/* ---------- 跑马灯 ---------- */
.marquee { display: flex; overflow: hidden; width: 100%; user-select: none; gap: 0; }
.marquee__g { display: flex; flex: 0 0 auto; align-items: center; gap: clamp(28px, 4vw, 76px); padding-right: clamp(28px, 4vw, 76px); will-change: transform; }
.marquee__i { display: flex; align-items: center; gap: 14px; font: 700 clamp(1.5rem, 3.6vw, 3.2rem)/1 var(--font-display); letter-spacing: -.02em; white-space: nowrap; color: var(--ink); }
.marquee__i i { width: 11px; height: 11px; border-radius: 50%; background: var(--grad-brand); }
.marquee--outline .marquee__i {
  color: transparent; -webkit-text-stroke: 1.3px var(--ink-3);
}
.sec--dark .marquee__i { color: var(--on-dark); }

/* ---------- Swiper 定制 ---------- */
.sw { width: 100%; overflow: hidden; }
.sw .swiper-slide { height: auto; }
.sw-nav { display: flex; gap: 12px; }
.sw-btn {
  width: 52px; height: 52px; border-radius: 50%; border: 1px solid var(--line);
  display: grid; place-items: center; transition: all var(--dur-fast) var(--ease);
}
.sw-btn:hover { background: var(--ink); color: #fff; border-color: var(--ink); }
.sec--dark .sw-btn { border-color: var(--line-dark); }
.sec--dark .sw-btn:hover { background: var(--brand); border-color: var(--brand); }
.sw-btn.swiper-button-disabled { opacity: .3; pointer-events: none; }
.sw-prog { position: relative; flex: 1; height: 2px; background: var(--line); max-width: 320px; }
.sec--dark .sw-prog { background: var(--line-dark); }
.sw-prog .swiper-pagination-progressbar-fill { background: var(--grad-brand); }
.sw-foot { display: flex; align-items: center; gap: 24px; margin-top: 36px; }
.sw-count { font: 600 var(--fs-sm)/1 var(--font-mono); letter-spacing: .1em; }
.sw-count b { font-size: 1.2em; }

/* 全屏 fade 轮播（Hero 型） */
.swhero { position: relative; height: 78svh; min-height: 460px; border-radius: var(--r-lg); overflow: hidden; }
.swhero .swiper-slide { position: relative; overflow: hidden; }
.swhero__cap { position: absolute; inset: auto 0 0 0; z-index: 3; padding: clamp(26px, 4vw, 60px); color: #fff; }
.swhero__cap h3 { font: 700 clamp(1.6rem, 3.4vw, 3rem)/1.1 var(--font-display); letter-spacing: -.02em; }
.swhero__cap p { color: rgba(255,255,255,.7); margin-top: 10px; max-width: 52ch; }

/* cards 效果轮播 */
.swcards { width: min(380px, 84vw); overflow: visible; }
.swcards .swiper-slide { border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--sh-2); }

/* ---------- 自定义光标 ---------- */
.cur, .cur-d {
  position: fixed; top: 0; left: 0; z-index: 900; pointer-events: none;
  border-radius: 50%; mix-blend-mode: difference;
}
.cur { width: 7px; height: 7px; background: #fff; margin: -3.5px 0 0 -3.5px; }
.cur-d { width: 40px; height: 40px; border: 1px solid rgba(255,255,255,.6); margin: -20px 0 0 -20px; }
.cur-d.is-big { width: 74px; height: 74px; margin: -37px 0 0 -37px; background: rgba(255,255,255,.14); border-color: transparent; }

/* ---------- 页脚揭示 ---------- */
.reveal-host { position: relative; z-index: 2; background: var(--paper); }
.foot {
  position: relative; z-index: 1; background: var(--ink); color: var(--on-dark);
  padding-block: clamp(56px, 8vw, 108px) 34px;
}
.foot__big {
  display: flex; gap: .02em;
  font: 800 clamp(2.4rem, 9vw, 9rem)/0.95 var(--font-display);
  letter-spacing: -.04em; color: #fff;
  --fill: 0%;
}
.foot__big .ch {
  position: relative; display: block;
  color: rgba(255,255,255,.13);            /* 空态：暗淡描边感 */
}
/* 注水层：渐变填字，clip-path 从下往上揭开，--fill 由滚动驱动 */
.foot__big .ch::before {
  content: attr(data-ch);
  position: absolute; left: 0; top: 0;
  background: linear-gradient(to top, var(--brand) 0%, var(--brand-2) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  clip-path: inset(calc(100% - var(--fill)) 0 0 0);
}
@media (prefers-reduced-motion: reduce) {
  .foot__big { --fill: 100% !important; }
}
.foot__cols { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: var(--gap); margin-block: clamp(38px, 5vw, 70px); }
.foot__cols h4 { font: 600 var(--fs-xs)/1 var(--font-mono); letter-spacing: .2em; text-transform: uppercase; color: var(--on-dark-3); margin-bottom: 18px; }
.foot__cols li { margin-bottom: 10px; }
.foot__cols a { color: var(--on-dark-2); font-size: var(--fs-sm); transition: color var(--dur-fast); }
.foot__cols a:hover { color: var(--brand-2); }
.foot__bar { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 26px; border-top: 1px solid var(--line-dark); color: var(--on-dark-3); font-size: var(--fs-xs); }

/* ---------- 区块序号装饰 ---------- */
.sec__no {
  position: absolute; right: var(--pad-x); top: calc(var(--sec-y) * 0.42);
  font: 700 clamp(4rem, 13vw, 13rem)/1 var(--font-display);
  color: transparent; -webkit-text-stroke: 1px var(--line); pointer-events: none; z-index: 0;
}
.sec--dark .sec__no { -webkit-text-stroke-color: var(--line-dark); }

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) {
  .g-4 { grid-template-columns: repeat(2, 1fr); }
  .foot__cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  :root { --nav-h: 64px; }
  .menu { display: none; }
  .burger { display: block; }
  .g-2, .g-3 { grid-template-columns: 1fr; }
  .hero__meta { gap: 22px; }
  .sw-foot { flex-wrap: wrap; }
  .cur, .cur-d { display: none; }
  .hero__foot { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 520px) {
  .g-4 { grid-template-columns: 1fr; }
  .foot__cols { grid-template-columns: 1fr; }
  .nav__right .btn { display: none; }
}