/* ==========================================================================
   善建达路灯 · 全站样式
   设计语言：编辑式栅格 + 深墨蓝 + 暖光金 · 克制动效
   作者：WorkBuddy  |  纯 CSS，无框架依赖
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
  /* 色板 */
  --ink:        #08131F;
  --ink-2:      #0D1E2C;
  --ink-3:      #14293A;
  --paper:      #F7F6F3;
  --paper-2:    #FFFFFF;
  --gold:       #C9862B;
  --gold-lt:    #E9B769;
  --glow:       #FFE3B4;
  --teal:       #2C6E6A;
  --text:       #16222D;
  --text-2:     #3D4A56;
  --muted:      #6B7884;
  --line:       #E2E2DA;
  --line-dark:  rgba(255, 255, 255, .14);

  /* 字体 */
  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC",
               "Noto Sans SC", "Microsoft YaHei", "Hiragino Sans GB",
               system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-num:  "DIN Alternate", "Bahnschrift", "Helvetica Neue", Arial, sans-serif;

  /* 尺度 */
  --wrap: 1200px;
  --gutter: clamp(20px, 4vw, 40px);
  --sp-section: clamp(64px, 8.5vw, 132px);
  --r-sm: 3px;
  --r-md: 6px;
  --r-lg: 14px;

  /* 动效 */
  --ease: cubic-bezier(.22, .61, .36, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
}

/* ---------- 2. 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16.5px;
  line-height: 1.8;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p, figure { margin: 0; }
:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection { background: var(--gold-lt); color: var(--ink); }

/* ---------- 3. 排版基线 ---------- */
.h1, h1 {
  font-size: clamp(2.35rem, 5.4vw, 4.35rem);
  line-height: 1.1;
  letter-spacing: -.028em;
  font-weight: 650;
}
h2, .h2 {
  font-size: clamp(1.75rem, 3.2vw, 2.75rem);
  line-height: 1.24;
  letter-spacing: -.02em;
  font-weight: 650;
}
h3, .h3 {
  font-size: clamp(1.05rem, 1.5vw, 1.3rem);
  line-height: 1.5;
  letter-spacing: -.01em;
  font-weight: 600;
}
.lead {
  font-size: clamp(1.02rem, 1.35vw, 1.19rem);
  line-height: 1.85;
  color: var(--text-2);
}
.muted { color: var(--muted); }
.small { font-size: .875rem; line-height: 1.7; }
.num { font-family: var(--font-num); font-variant-numeric: tabular-nums; }

/* 眉标：01 —— 产品与方案 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .7em;
  font-size: .78rem;
  letter-spacing: .18em;
  font-weight: 600;
  color: var(--gold);
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  opacity: .7;
}

/* ---------- 4. 布局 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: var(--sp-section); position: relative; }
.section--tight { padding-block: clamp(48px, 6vw, 88px); }
.section--paper { background: var(--paper); }
.section--white { background: var(--paper-2); }
.section--ink { background: var(--ink); color: #EAEFF3; }
.section--ink .lead, .section--ink .muted { color: #A8B7C4; }
.section--ink .eyebrow { color: var(--gold-lt); }

.section__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
  gap: clamp(20px, 4vw, 72px);
  align-items: end;
  margin-bottom: clamp(36px, 4.5vw, 68px);
}
.section__head .lead { max-width: 46ch; }

.rule { height: 1px; background: var(--line); border: 0; margin: 0; }
.section--ink .rule { background: var(--line-dark); }

/* ---------- 5. 按钮 ---------- */
.btn {
  --btn-bg: var(--ink);
  --btn-fg: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55em;
  padding: .82em 1.5em;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: .02em;
  line-height: 1.3;
  cursor: pointer;
  transition: transform .35s var(--ease), background .3s, box-shadow .35s, color .3s, border-color .3s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 12px 28px -14px rgba(8, 19, 31, .55); }
.btn:active { transform: translateY(0); }

.btn--gold { --btn-bg: var(--gold); --btn-fg: #1A1204; }
.btn--gold:hover { --btn-bg: #D6932F; }

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--ink);
  border-color: rgba(8, 19, 31, .22);
}
.btn--ghost:hover { --btn-bg: rgba(8, 19, 31, .055); border-color: rgba(8, 19, 31, .38); }

.section--ink .btn--ghost, .hero .btn--ghost { --btn-fg: #EDF2F6; border-color: rgba(255, 255, 255, .3); }
.section--ink .btn--ghost:hover, .hero .btn--ghost:hover { --btn-bg: rgba(255, 255, 255, .1); border-color: rgba(255, 255, 255, .5); }

.btn__arrow { transition: transform .35s var(--ease); }
.btn:hover .btn__arrow { transform: translateX(3px); }

/* 文字链 */
.tlink {
  display: inline-flex;
  align-items: center;
  gap: .45em;
  font-weight: 600;
  font-size: .95rem;
  color: var(--gold);
  border-bottom: 1px solid rgba(201, 134, 43, .35);
  padding-bottom: 2px;
  transition: gap .3s var(--ease), border-color .3s;
}
.tlink:hover { gap: .8em; border-color: var(--gold); }

/* ---------- 6. 顶部导航 ---------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(247, 246, 243, .78);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: background .45s var(--ease), border-color .45s, box-shadow .45s;
}
.header.is-stuck {
  background: rgba(247, 246, 243, .94);
  border-bottom-color: var(--line);
  box-shadow: 0 1px 24px -18px rgba(8, 19, 31, .6);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 76px;
}

/* Logo */
.logo { display: inline-flex; align-items: center; gap: 10px; }
.logo__mark { width: 34px; height: 34px; flex: none; }
.logo__text { display: flex; flex-direction: column; line-height: 1.15; }
.logo__name {
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: .06em;
}
.logo__sub {
  font-size: .62rem;
  letter-spacing: .16em;
  color: var(--muted);
  text-transform: uppercase;
  margin-top: 2px;
  white-space: nowrap;
}

/* 导航链接 */
.nav { display: flex; align-items: center; gap: 4px; }
.nav__link {
  position: relative;
  padding: 9px 14px;
  font-size: .94rem;
  font-weight: 500;
  color: var(--text-2);
  border-radius: var(--r-sm);
  transition: color .25s;
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: 3px;
  height: 1.5px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s var(--ease);
}
.nav__link:hover { color: var(--ink); }
.nav__link:hover::after { transform: scaleX(1); }
.nav__link[aria-current="page"] { color: var(--ink); font-weight: 600; }
.nav__link[aria-current="page"]::after { transform: scaleX(1); }

.header__actions { display: flex; align-items: center; gap: 10px; }
.header__tel {
  font-family: var(--font-num);
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.header__tel svg { width: 15px; height: 15px; color: var(--gold); }

/* 汉堡按钮 */
.burger {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: rgba(255, 255, 255, .6);
  cursor: pointer;
  padding: 0;
  place-items: center;
}
.burger span {
  display: block;
  width: 17px; height: 1.5px;
  background: var(--ink);
  transition: transform .35s var(--ease), opacity .25s;
}
.burger span + span { margin-top: 4.5px; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 移动抽屉 */
.drawer {
  position: fixed;
  inset: 76px 0 auto 0;
  z-index: 99;
  background: var(--paper-2);
  border-bottom: 1px solid var(--line);
  padding: 8px var(--gutter) 26px;
  display: none;
  box-shadow: 0 18px 40px -30px rgba(8, 19, 31, .8);
}
.drawer.is-open { display: block; animation: drawerIn .32s var(--ease) both; }
@keyframes drawerIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }
.drawer a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 2px;
  border-bottom: 1px solid var(--line);
  font-size: 1rem;
  font-weight: 500;
}
.drawer a:last-of-type { border-bottom: 0; }
.drawer a .num { font-size: .72rem; color: var(--muted); letter-spacing: .1em; }
.drawer .btn { margin-top: 16px; width: 100%; }

/* 阅读进度条 */
.scrollbar {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--gold), var(--gold-lt));
  z-index: 101;
  transition: width .12s linear;
}

/* ---------- 7. Hero（首页） ---------- */
.hero {
  position: relative;
  background: var(--ink);
  color: #F2F6F9;
  overflow: hidden;
  padding-top: 76px;
  isolation: isolate;
}
.hero__glow {
  position: absolute;
  pointer-events: none;
  z-index: -1;
  inset: 0;
  background:
    radial-gradient(42% 46% at 80% 20%, rgba(233, 183, 105, .26) 0%, rgba(233, 183, 105, 0) 66%),
    radial-gradient(34% 44% at 94% 46%, rgba(255, 206, 138, .12) 0%, rgba(255, 206, 138, 0) 72%),
    radial-gradient(38% 42% at 12% 82%, rgba(44, 110, 106, .3) 0%, rgba(44, 110, 106, 0) 68%),
    linear-gradient(180deg, #081420 0%, #050E18 62%, #071320 100%);
}

/* Hero 星空：JS 生成星点，随机位置 / 大小 / 闪烁节奏 */
.hero__stars {
  position: absolute;
  z-index: -1;
  top: 0;
  right: -6%;
  width: 62%;
  height: 100%;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,1) 0%, rgba(0,0,0,1) 62%, rgba(0,0,0,0) 96%);
  mask-image: linear-gradient(180deg, rgba(0,0,0,1) 0%, rgba(0,0,0,1) 62%, rgba(0,0,0,0) 96%);
}
.hero__stars i {
  position: absolute;
  display: block;
  border-radius: 50%;
  background: #FFFFFF;
  opacity: var(--op, .7);
  box-shadow: 0 0 4px rgba(220, 235, 255, .9), 0 0 10px rgba(150, 195, 255, .45);
  animation: twinkle var(--tw, 3s) ease-in-out var(--dl, 0s) infinite;
  will-change: opacity, transform;
}
.hero__stars i.is-big {
  background: #FFFDF7;
  box-shadow:
    0 0 6px #FFFFFF,
    0 0 16px rgba(255, 226, 178, .85),
    0 0 34px rgba(255, 204, 130, .45);
}
.hero__stars i.is-warm {
  box-shadow: 0 0 5px #FFF4E0, 0 0 14px rgba(255, 214, 150, .7);
}
@keyframes twinkle {
  0%, 100% { opacity: .1; transform: scale(.72); }
  45% { opacity: var(--op, .7); transform: scale(1.15); }
  62% { opacity: calc(var(--op, .7) * .72); transform: scale(.95); }
}
.hero__grid-lines {
  position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, .05) 1px, transparent 1px);
  background-size: 25% 100%;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.85), rgba(0,0,0,0) 78%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.85), rgba(0,0,0,0) 78%);
}
.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  gap: clamp(24px, 4vw, 64px);
  align-items: center;
  padding-block: clamp(52px, 7.5vw, 104px) clamp(56px, 8vw, 108px);
  min-height: min(78vh, 720px);
}
.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 6px 13px 6px 10px;
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: 100px;
  font-size: .78rem;
  letter-spacing: .1em;
  color: #D9E2E9;
  background: rgba(255, 255, 255, .045);
}
.hero__tag i {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--gold-lt);
  box-shadow: 0 0 0 3px rgba(233, 183, 105, .22);
  animation: pulseDot 2.6s var(--ease) infinite;
}
@keyframes pulseDot {
  0%, 100% { box-shadow: 0 0 0 3px rgba(233, 183, 105, .22); }
  50% { box-shadow: 0 0 0 7px rgba(233, 183, 105, 0); }
}
/* 首屏标题：发光渐变字
   底层用 background-clip:text 做渐变，再用 drop-shadow 做辉光。
   注意：文字设成透明后 text-shadow 不生效，必须用 filter: drop-shadow。 */
.hero h1 {
  margin-top: 26px;
  font-size: clamp(2.4rem, 5.2vw, 4.15rem);
  letter-spacing: -.03em;
  line-height: 1.12;
  background: linear-gradient(96deg, #FFFFFF 0%, #EAF3FA 30%, #FFF7E8 62%, #FFE2B4 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 18px rgba(226, 216, 200, .22));
}
.hero h1 .hl {
  position: relative;
  white-space: nowrap;
  padding-right: .02em;
  background: linear-gradient(100deg,
    #F4C479 0%, #FFE3B5 14%, #FFFDF8 30%, #FFD69A 46%,
    #F0A94E 62%, #FFE3B5 78%, #FFFDF8 90%, #F4C479 100%);
  background-size: 280% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  animation: hlFlow 8s linear infinite, hlPulse 5.4s ease-in-out infinite;
  filter:
    drop-shadow(0 0 3px rgba(255, 240, 214, .6))
    drop-shadow(0 0 18px rgba(255, 200, 112, .8))
    drop-shadow(0 0 48px rgba(255, 168, 58, .5))
    drop-shadow(0 0 104px rgba(255, 150, 40, .32));
}
@keyframes hlFlow {
  0% { background-position: 0% 50%; }
  100% { background-position: 280% 50%; }
}
/* 灯的"呼吸"感：外辉光缓慢变强变弱 */
@keyframes hlPulse {
  0%, 100% {
    filter:
      drop-shadow(0 0 3px rgba(255, 240, 214, .55))
      drop-shadow(0 0 16px rgba(255, 198, 108, .62))
      drop-shadow(0 0 44px rgba(255, 168, 58, .38))
      drop-shadow(0 0 96px rgba(255, 150, 40, .24));
  }
  50% {
    filter:
      drop-shadow(0 0 4px rgba(255, 246, 228, .8))
      drop-shadow(0 0 24px rgba(255, 208, 128, .95))
      drop-shadow(0 0 62px rgba(255, 176, 66, .6))
      drop-shadow(0 0 128px rgba(255, 150, 40, .42));
  }
}
/* 标题区域的暖光晕（放在 copy 容器上，避免被 background-clip:text 抢层级） */
.hero__copy { position: relative; }
.hero__copy::before {
  content: "";
  position: absolute;
  z-index: -1;
  left: -8%;
  top: 2%;
  width: 82%;
  height: 46%;
  background: radial-gradient(58% 62% at 38% 62%, rgba(255, 196, 118, .26) 0%, rgba(255, 176, 66, 0) 72%);
  filter: blur(30px);
  pointer-events: none;
}
.hero__desc {
  margin-top: 24px;
  max-width: 40ch;
  color: #B9C6D2;
  font-size: clamp(1rem, 1.3vw, 1.12rem);
  line-height: 1.85;
}
.hero__cta { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 12px; }
.hero__meta {
  margin-top: 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  font-size: .86rem;
  color: #93A3B2;
}
.hero__meta span { display: inline-flex; align-items: center; gap: 7px; }
.hero__meta svg { width: 14px; height: 14px; color: var(--gold-lt); opacity: .9; }

/* Hero 视觉（灯杆场景） */
.hero__scene { position: relative; }
.hero__scene svg { width: 100%; height: auto; overflow: visible; }
.scene-ray {
  opacity: 0;
  animation: rayIn 1.6s var(--ease-out) .5s forwards;
}
@keyframes rayIn { to { opacity: 1; } }
.scene-lamp-core {
  transform-origin: 455px 182px;
  animation: lampBreath 5.2s ease-in-out 1.8s infinite;
}
.scene-lamp-halo {
  transform-origin: 455px 182px;
  animation: haloBreath 7.4s ease-in-out 1.8s infinite;
}
@keyframes lampBreath {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .88; transform: scale(1.03); }
}
@keyframes haloBreath {
  0%, 100% { opacity: .78; transform: scale(1); }
  50% { opacity: .58; transform: scale(1.07); }
}
.scene-dash {
  stroke-dasharray: 4 8;
  animation: dashMove 3.6s linear infinite;
}
@keyframes dashMove { to { stroke-dashoffset: -96; } }

/* Hero 底部数据条 */
.hero__stats {
  border-top: 1px solid var(--line-dark);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.hero__stats > div {
  padding: 26px 4px 30px;
  position: relative;
}
.hero__stats > div + div::before {
  content: "";
  position: absolute;
  left: 0; top: 26px; bottom: 30px;
  width: 1px;
  background: var(--line-dark);
}
.hero__stats dt {
  font-family: var(--font-num);
  font-size: clamp(1.5rem, 2.6vw, 2.05rem);
  font-weight: 600;
  color: #fff;
  letter-spacing: -.01em;
  line-height: 1.2;
}
.hero__stats dt small { font-size: .55em; font-weight: 500; color: var(--gold-lt); margin-left: 3px; }
.hero__stats dd {
  margin: 6px 0 0;
  font-size: .82rem;
  letter-spacing: .04em;
  color: #8E9EAD;
}

/* ---------- 8. 内页页头 ---------- */
.page-hero {
  background: var(--ink);
  color: #EFF4F8;
  padding-top: calc(76px + clamp(44px, 6vw, 78px));
  padding-bottom: clamp(44px, 6vw, 78px);
  position: relative;
  overflow: hidden;
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(60% 120% at 88% 0%, rgba(233, 183, 105, .18), transparent 62%);
  pointer-events: none;
}
/* 注意：本元素同时带 .wrap，需显式左对齐，否则 max-width 会让它水平居中 */
/* 用 px 而不是 ch：ch 按本元素字号（16.5px）计算，会把标题挤成窄栏 */
.page-hero__inner {
  position: relative;
  display: grid;
  gap: 18px;
  max-width: min(820px, 100%);
  margin-inline: 0 auto;
}
.page-hero h1 { font-size: clamp(1.95rem, 4vw, 3.1rem); letter-spacing: -.025em; }
.page-hero .lead { color: #AEBCC9; }
.crumb {
  display: flex; align-items: center; gap: 8px;
  font-size: .8rem; letter-spacing: .06em; color: #8998A6;
}
.crumb a:hover { color: var(--gold-lt); }
.crumb span { opacity: .5; }

/* ---------- 9. 数字条 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
}
.stats > div { padding: 30px 0 34px; position: relative; }
.stats > div + div { padding-left: clamp(16px, 2.5vw, 34px); }
.stats > div + div::before {
  content: ""; position: absolute; left: 0; top: 30px; bottom: 34px;
  width: 1px; background: var(--line);
}
.stats dt { font-family: var(--font-num); font-size: clamp(1.5rem, 2.4vw, 1.95rem); font-weight: 600; line-height: 1.15; }
.stats dt small { font-size: .5em; margin-left: 2px; color: var(--muted); }
.stats dd { margin: 8px 0 0; font-size: .85rem; color: var(--muted); }

/* ---------- 10. 卡片网格 ---------- */
.grid { display: grid; gap: clamp(14px, 1.6vw, 22px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  position: relative;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: clamp(22px, 2.4vw, 32px);
  transition: transform .45s var(--ease), border-color .35s, box-shadow .45s;
  overflow: hidden;
}
.card::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), var(--gold-lt));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .5s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(201, 134, 43, .32);
  box-shadow: 0 22px 46px -34px rgba(8, 19, 31, .5);
}
.card:hover::after { transform: scaleX(1); }
.card__no {
  font-family: var(--font-num);
  font-size: .8rem;
  letter-spacing: .14em;
  color: var(--gold);
  font-weight: 600;
}
.card h3 { margin-top: 14px; }
.card p { margin-top: 10px; color: var(--text-2); font-size: .95rem; line-height: 1.8; }
.card__icon { width: 40px; height: 40px; color: var(--gold); margin-bottom: 4px; }

.card--list { display: flex; flex-direction: column; }
.card__tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 18px; }
.tag {
  font-size: .76rem;
  letter-spacing: .02em;
  color: var(--text-2);
  background: rgba(8, 19, 31, .045);
  border: 1px solid rgba(8, 19, 31, .07);
  border-radius: 100px;
  padding: 3px 10px;
}

/* 深色卡片 */
.card--dark {
  background: var(--ink-2);
  border-color: rgba(255, 255, 255, .1);
  color: #E7EDF2;
}
.card--dark p { color: #9FB0BE; }
.card--dark:hover { border-color: rgba(233, 183, 105, .42); box-shadow: 0 26px 50px -34px #000; }
.card--dark .tag { background: rgba(255, 255, 255, .06); border-color: rgba(255, 255, 255, .1); color: #BCC9D4; }

/* ---------- 11. 产品面板 ---------- */
.ptabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(24px, 3vw, 40px);
  scroll-margin-top: 96px;
}
.ptab {
  position: relative;
  background: none;
  border: 0;
  padding: 13px 18px;
  font-size: .95rem;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  transition: color .25s;
}
.ptab::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px; bottom: -1px;
  height: 2px; background: var(--gold);
  transform: scaleX(0); transform-origin: center;
  transition: transform .4s var(--ease);
}
.ptab:hover { color: var(--text); }
.ptab[aria-selected="true"] { color: var(--ink); font-weight: 650; }
.ptab[aria-selected="true"]::after { transform: scaleX(1); }

.ppanel { display: none; }
.ppanel.is-active { display: block; animation: fadeUp .5s var(--ease) both; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

.panel__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  gap: clamp(24px, 4vw, 60px);
}
.spec { border-top: 1px solid var(--line); }
.spec > div {
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr);
  gap: 16px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
  font-size: .93rem;
}
.spec dt { color: var(--muted); }
.spec dd { margin: 0; color: var(--text); }

/* ---------- 12. 场景（无照片的图形化展示） ---------- */
.scene {
  position: relative;
  min-height: 260px;
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--ink-2);
  color: #EAF0F5;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(20px, 2.4vw, 30px);
  isolation: isolate;
}
.scene__art { position: absolute; inset: 0; z-index: -1; opacity: .9; }
.scene__art svg { width: 100%; height: 100%; }
.scene::after {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(180deg, rgba(8, 19, 31, .1) 0%, rgba(8, 19, 31, .55) 55%, rgba(8, 19, 31, .92) 100%);
}
.scene h3 { color: #fff; font-size: 1.16rem; }
.scene p { color: #A8B8C6; font-size: .9rem; margin-top: 8px; line-height: 1.75; }
.scene__no {
  position: absolute; top: 18px; right: 22px;
  font-family: var(--font-num); font-size: .78rem;
  letter-spacing: .16em; color: rgba(255, 255, 255, .5);
}
.scene:hover .scene__art { transform: scale(1.04); }
.scene__art { transition: transform 1.1s var(--ease); }

/* ---------- 13. 时间线（7 步交付流程） ---------- */
.flow {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0;
  counter-reset: step;
  border-top: 1px solid var(--line-dark);
}
.flow__item {
  padding: 26px 18px 30px 0;
  position: relative;
}
.flow__item::before {
  content: "";
  position: absolute; top: -4px; left: 0;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(233, 183, 105, .16);
}
.flow__item::after {
  content: "";
  position: absolute; top: -1px; left: 18px; right: 0;
  height: 1px; background: var(--line-dark);
}
.flow__item:last-child::after { display: none; }
.flow__no {
  font-family: var(--font-num);
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--gold-lt);
}
.flow__item h4 { margin: 10px 0 8px; font-size: .98rem; font-weight: 600; color: #EAF0F5; }
.flow__item p { font-size: .84rem; line-height: 1.72; color: #93A4B3; }

/* ---------- 14. 对比/参数表 ---------- */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: .92rem;
  min-width: 560px;
}
.table caption {
  text-align: left;
  font-size: .82rem;
  color: var(--muted);
  padding-bottom: 12px;
}
.table th, .table td {
  text-align: left;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.table thead th {
  font-size: .8rem;
  letter-spacing: .06em;
  color: var(--muted);
  font-weight: 600;
  border-bottom: 1px solid var(--ink);
  white-space: nowrap;
}
.table tbody tr:hover { background: rgba(201, 134, 43, .045); }
.table td:first-child { color: var(--text); font-weight: 500; }
.table td { color: var(--text-2); }

/* ---------- 15. FAQ 手风琴 ---------- */
.acc { border-top: 1px solid var(--line); }
.acc__item { border-bottom: 1px solid var(--line); }
.acc__btn {
  width: 100%;
  background: none;
  border: 0;
  padding: 22px 44px 22px 0;
  text-align: left;
  font-size: 1.01rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  position: relative;
  line-height: 1.6;
  transition: color .25s;
}
.acc__btn:hover { color: var(--gold); }
.acc__btn::after {
  content: "";
  position: absolute;
  right: 6px; top: 50%;
  width: 11px; height: 11px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translateY(-70%) rotate(45deg);
  transition: transform .4s var(--ease);
  opacity: .55;
}
.acc__btn[aria-expanded="true"]::after { transform: translateY(-30%) rotate(-135deg); opacity: 1; }
.acc__panel {
  overflow: hidden;
  height: 0;
  transition: height .42s var(--ease);
}
.acc__panel > div {
  padding: 0 clamp(0px, 3vw, 48px) 24px 0;
  color: var(--text-2);
  font-size: .95rem;
  line-height: 1.85;
}
.section--ink .acc { border-color: var(--line-dark); }
.section--ink .acc__item { border-color: var(--line-dark); }
.section--ink .acc__btn { color: #E9EFF4; }
.section--ink .acc__panel > div { color: #A4B4C1; }

/* ---------- 16. CTA 区块 ---------- */
.cta {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: #F3F7FA;
  border-radius: var(--r-lg);
  padding: clamp(34px, 5vw, 62px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  isolation: isolate;
}
.cta::before {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(50% 120% at 92% 8%, rgba(233, 183, 105, .26), transparent 60%),
    radial-gradient(40% 100% at 6% 96%, rgba(44, 110, 106, .28), transparent 62%);
}
.cta h2 { font-size: clamp(1.5rem, 2.6vw, 2.15rem); }
.cta p { margin-top: 12px; color: #A9B8C5; font-size: .96rem; max-width: 52ch; }
.cta__actions { display: flex; flex-wrap: wrap; gap: 10px; }

/* ---------- 17. 表单 ---------- */
.form { display: grid; gap: 16px; }
.field { display: grid; gap: 7px; }
.field > label { font-size: .82rem; letter-spacing: .04em; color: var(--text-2); font-weight: 600; }
.field .req { color: #C0392B; }
.input, .textarea, .select {
  width: 100%;
  padding: 12px 14px;
  font: inherit;
  font-size: .95rem;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  transition: border-color .25s, box-shadow .25s;
}
.input:focus, .textarea:focus, .select:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201, 134, 43, .13);
}
.textarea { min-height: 112px; resize: vertical; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.hint { font-size: .78rem; color: var(--muted); }
.form__ok {
  display: none;
  padding: 14px 16px;
  border: 1px solid rgba(44, 110, 106, .3);
  background: rgba(44, 110, 106, .07);
  border-radius: var(--r-sm);
  font-size: .9rem;
  color: #1F5754;
}
.form__ok.is-on { display: block; }

/* ---------- 18. 页脚 ---------- */
.footer {
  background: var(--ink);
  color: #9DADBB;
  padding-top: clamp(48px, 6vw, 76px);
  font-size: .9rem;
}
.footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.32fr) repeat(3, minmax(0, .92fr));
  gap: clamp(24px, 4vw, 56px);
  padding-bottom: clamp(34px, 4vw, 52px);
}
.footer__brand .logo__name { color: #fff; }
.footer__brand .logo__sub { color: #7E8FA0; }
.footer__desc { margin-top: 18px; max-width: 34ch; line-height: 1.85; color: #92A3B1; }
.footer h4 {
  color: #E7EEF4;
  font-size: .82rem;
  letter-spacing: .12em;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer li + li { margin-top: 10px; }
.footer a:hover { color: var(--gold-lt); }
.footer__contact li { display: flex; gap: 9px; line-height: 1.7; }
/* 页脚地址较长，单独降半号字并允许三行，避免出现"号"字落单 */
.footer__addr { font-size: .8rem; line-height: 1.7; letter-spacing: .01em; }
.footer__contact svg { width: 15px; height: 15px; flex: none; margin-top: 5px; color: var(--gold); }
.footer__bottom {
  border-top: 1px solid var(--line-dark);
  padding: 22px 0 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  align-items: center;
  justify-content: space-between;
  font-size: .82rem;
  color: #7C8D9C;
}
.footer__legal { display: flex; flex-wrap: wrap; gap: 8px 18px; align-items: center; }
.footer__legal a:hover { color: var(--gold-lt); }
.footer__icp {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line-dark);
  border-radius: 100px;
  font-size: .76rem;
  color: #8C9DAC;
}
.footer__todo {
  border: 1px dashed rgba(233, 183, 105, .4);
  color: #C9A96A;
  background: rgba(233, 183, 105, .06);
}

/* ---------- 19. 正文/合规页 ---------- */
.prose { max-width: 72ch; }
.prose h2 { margin-top: 2.4em; font-size: 1.35rem; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin-top: 1.8em; font-size: 1.05rem; }
.prose p, .prose li { margin-top: .85em; color: var(--text-2); font-size: .96rem; line-height: 1.9; }
.prose ul { list-style: disc; padding-left: 1.3em; }
.prose li::marker { color: var(--gold); }
.prose a { color: var(--gold); border-bottom: 1px solid rgba(201, 134, 43, .35); }
.prose strong { color: var(--text); }

/* ---------- 20. 滚动渐显 ---------- */
.js .reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .8s var(--ease-out), transform .8s var(--ease-out);
  transition-delay: var(--d, 0ms);
  will-change: opacity, transform;
}
.js .reveal.is-in { opacity: 1; transform: none; }

/* ---------- 21. 回到顶部 ---------- */
.totop {
  position: fixed;
  right: clamp(14px, 3vw, 28px);
  bottom: clamp(14px, 3vw, 28px);
  z-index: 90;
  width: 44px; height: 44px;
  display: grid; place-items: center;
  background: rgba(8, 19, 31, .88);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .35s, transform .35s var(--ease), visibility .35s;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.totop.is-on { opacity: 1; visibility: visible; transform: none; }
.totop:hover { background: var(--gold); color: #1A1204; }
.totop svg { width: 16px; height: 16px; }

/* ---------- 22. 404 ---------- */
.err {
  min-height: 74vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 120px 0 80px;
}
.err__code {
  font-family: var(--font-num);
  font-size: clamp(4.4rem, 14vw, 9rem);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -.04em;
  color: var(--ink);
  opacity: .1;
}

/* ---------- 23. 响应式 ---------- */
@media (max-width: 1080px) {
  .hero__inner { grid-template-columns: 1fr; min-height: 0; }
  .hero__scene { order: 2; max-width: 520px; margin-top: 8px; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
  .hero__stats > div:nth-child(3)::before { display: none; }
  .hero__stats > div:nth-child(3), .hero__stats > div:nth-child(4) { border-top: 1px solid var(--line-dark); }
  .flow { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .flow__item:nth-child(4)::after { display: none; }
  .flow__item:nth-child(n+5) { border-top: 1px solid var(--line-dark); padding-top: 30px; }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .nav, .header__tel { display: none; }
  .burger { display: grid; }
  .header__inner { height: 68px; }
  .drawer { top: 68px; }
  .section__head { grid-template-columns: 1fr; align-items: start; }
  .panel__grid { grid-template-columns: 1fr; }
  .cta { grid-template-columns: 1fr; }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__top { grid-template-columns: 1fr 1fr; }
  .form__row { grid-template-columns: 1fr; }

  /* 移动端：隐藏灯杆场景，改用星空 + 纯光效背景，避免裁切后出现孤立线条 */
  .hero__inner { position: relative; min-height: 0; }
  .hero__copy { position: relative; z-index: 2; }
  .hero__scene { display: none; }
  .hero__stars { right: -8%; width: 116%; opacity: .9; }
  .hero__copy::before { width: 100%; left: -10%; height: 38%; }
}

@media (max-width: 620px) {
  body { font-size: 16px; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stats > div { padding: 22px 0 24px; }
  .stats > div + div { padding-left: 14px; }
  .stats > div:nth-child(3)::before { display: none; }
  .stats > div:nth-child(3), .stats > div:nth-child(4) { border-top: 1px solid var(--line); }
  .flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow__item:nth-child(2n)::after { display: none; }
  .flow__item:nth-child(n+3) { border-top: 1px solid var(--line-dark); padding-top: 30px; }
  .hero__cta { gap: 10px; }
  .hero__cta .btn, .cta__actions .btn { flex: 1 1 100%; }
  .hero__meta { gap: 8px 16px; font-size: .8rem; margin-top: 28px; }
  .hero__inner { padding-top: 30px; }
  .logo__sub { font-size: .56rem; letter-spacing: .1em; }
  .logo__name { font-size: .95rem; }
  .header__actions .btn { padding: .7em 1em; font-size: .86rem; }
  .footer__top { grid-template-columns: 1fr; gap: 30px; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
  .hero__stats { grid-template-columns: 1fr 1fr; }
  .hero__stats > div { padding: 20px 2px 22px; }
  .scene { min-height: 220px; }
  .cta { padding: 26px 22px; }
  .table { min-width: 0; font-size: .86rem; }
  .table th, .table td { padding: 11px 10px; }
  .prose { font-size: 1rem; }
}

@media (max-width: 400px) {
  .header__actions .btn { display: none; }
  .logo__sub { display: none; }
}

/* ---------- 24. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .js .reveal { opacity: 1; transform: none; }
  /* 星点靠 animation 实现闪烁，降级后要显式给回可见透明度，否则停在最暗帧 */
  .hero__stars i { animation: none !important; opacity: var(--op, .7); }
}

/* ---------- 24b. 文章与选型指南 ---------- */
.article-wrap { max-width: 74ch; }

/* 文章正文里的表格（参数对照表），移动端可横向滚动 */
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1.3em;
  font-size: .9rem;
  display: block;
  overflow-x: auto;
}
.prose th, .prose td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
  white-space: nowrap;
}
.prose th { background: #F1F0EA; color: var(--text); font-weight: 600; }
.prose td { color: var(--text-2); }
.prose table caption {
  caption-side: top;
  text-align: left;
  font-size: .82rem;
  color: var(--muted);
  padding-bottom: 8px;
}

.prose blockquote {
  margin-top: 1.4em;
  padding: 2px 0 2px 16px;
  border-left: 3px solid var(--gold);
  color: var(--text-2);
}

.prose h2 { color: var(--text); }
.prose ol { list-style: decimal; padding-left: 1.3em; }
.prose ol li::marker { color: var(--gold); }

/* 后台发文时插入的配图 */
.prose img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.4em 0 .6em;
  border-radius: 8px;
}
.prose figure { margin: 1.4em 0; }
.prose figcaption {
  font-size: .82rem;
  color: var(--muted);
  text-align: center;
  margin-top: 8px;
}
.prose blockquote p { margin-top: 0; }

/* 文章署名与更新时间 */
.article-meta {
  margin-top: 3em;
  padding-top: 1.3em;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  font-size: .82rem;
  color: var(--muted);
}

/* 文章底部的转化块 */
.article-cta {
  margin-top: 2em;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: var(--r-md);
  background: var(--paper-2);
}
.article-cta h3 { font-size: 1rem; color: var(--text); }
.article-cta p { margin-top: .5em; font-size: .9rem; color: var(--text-2); }
.article-cta .btn { margin-top: 14px; }

/* 相关阅读 */
.article-rel { margin-top: 2.6em; }
.article-rel h3 { font-size: .92rem; color: var(--muted); letter-spacing: .08em; }
.article-rel ul { margin-top: .8em; }
.article-rel li { margin-top: .5em; }
.article-rel a { color: var(--text); border-bottom: 1px solid var(--line); }
.article-rel a:hover { color: var(--gold); border-color: var(--gold); }

/* 文章列表页 */
.alist { display: grid; gap: 0; }
.alist__item {
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr);
  gap: 24px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}
.alist__item:first-child { border-top: none; }
.alist__date { font-family: var(--font-num); font-size: .8rem; color: var(--muted); letter-spacing: .04em; padding-top: 4px; }
.alist__title { font-size: 1.12rem; color: var(--text); }
.alist__title a { border-bottom: none; }
.alist__title a:hover { color: var(--gold); }
.alist__desc { margin-top: .45em; font-size: .92rem; color: var(--text-2); line-height: 1.75; }
.alist__tag {
  display: inline-block;
  margin-top: .7em;
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--gold);
  border: 1px solid rgba(201, 134, 43, .35);
  border-radius: 2px;
  padding: 2px 7px;
}

@media (max-width: 620px) {
  .alist__item { grid-template-columns: 1fr; gap: 8px; padding: 22px 0; }
  .alist__date { padding-top: 0; }
}

/* ---------- 25. 打印 ---------- */
@media print {
  .header, .drawer, .totop, .scrollbar, .hero__scene, .hero__stars, .cta { display: none !important; }
  body { background: #fff; color: #000; }
  .section { padding-block: 24px; }
  a { text-decoration: underline; }
}