/* =========================================================
   云南凡星智能科技有限公司 · 企业官网样式
   风格：深色科技 / 未来感 / 玻璃拟态 / 全响应式
   ========================================================= */

/* ---------- 设计令牌 ---------- */
:root {
  --bg:        #05070f;
  --bg-2:      #080d1a;
  --bg-3:      #0b1224;
  --surface:   rgba(255, 255, 255, .035);
  --surface-2: rgba(255, 255, 255, .06);
  --border:    rgba(255, 255, 255, .09);
  --border-2:  rgba(255, 255, 255, .16);

  --text:      #e9eefb;
  --text-2:    #b9c4dc;
  --muted:     #8794b0;

  --brand-1:   #22d3ee;  /* 青 */
  --brand-2:   #5b8cff;  /* 蓝 */
  --brand-3:   #a855f7;  /* 紫 */

  --grad-brand: linear-gradient(120deg, #22d3ee 0%, #5b8cff 52%, #a855f7 100%);
  --grad-soft:  linear-gradient(120deg, rgba(34,211,238,.16), rgba(168,85,247,.16));

  --radius:    18px;
  --radius-sm: 12px;
  --container: 1180px;

  --shadow-soft: 0 18px 50px -20px rgba(0, 0, 0, .85);
  --shadow-glow: 0 0 0 1px rgba(91,140,255,.22), 0 24px 60px -28px rgba(91,140,255,.65);

  --ease: cubic-bezier(.22, .61, .36, 1);
  --header-h: 70px;
}

/* ---------- 基础重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Hiragino Sans GB",
               -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .2px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 页面整体暗色底纹 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(900px 500px at 78% -8%,  rgba(34, 211, 238, .10), transparent 62%),
    radial-gradient(820px 520px at 12% 4%,   rgba(168, 85, 247, .10), transparent 60%),
    radial-gradient(1000px 700px at 50% 110%, rgba(91, 140, 255, .08), transparent 65%);
}

img, svg, video { max-width: 100%; display: block; }
[hidden] { display: none !important; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }
button { font: inherit; cursor: pointer; }
input, textarea { font: inherit; color: inherit; }

::selection { background: rgba(91, 140, 255, .38); color: #fff; }

/* 自定义滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #070a14; }
::-webkit-scrollbar-thumb {
  background: linear-gradient(#1d2b4a, #16203a);
  border-radius: 20px;
  border: 2px solid #070a14;
}
::-webkit-scrollbar-thumb:hover { background: linear-gradient(#2a3e69, #1d2b4a); }

/* ---------- 可访问性 ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 999;
  padding: 10px 18px;
  border-radius: 0 0 12px 12px;
  background: var(--brand-2);
  color: #fff;
  font-weight: 600;
  transition: top .25s var(--ease);
}
.skip-link:focus { top: 0; }

:focus-visible {
  outline: 2px solid var(--brand-1);
  outline-offset: 3px;
  border-radius: 6px;
}

/* Logo 已改用正式品牌图片资源（assets/img/） */

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
  position: relative;
  z-index: 2;
}

.section {
  position: relative;
  padding: 104px 0;
  z-index: 1;
}
.section-alt {
  background:
    linear-gradient(180deg, rgba(255,255,255,0) 0%, rgba(255,255,255,.022) 12%, rgba(255,255,255,.022) 88%, rgba(255,255,255,0) 100%);
  border-top: 1px solid rgba(255,255,255,.05);
  border-bottom: 1px solid rgba(255,255,255,.05);
}

/* ---------- 通用文本 ---------- */
.grad-text {
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section-head { max-width: 760px; margin-bottom: 58px; }

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2.6px;
  color: var(--brand-1);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.section-eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--brand-1));
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.28;
  font-weight: 800;
  letter-spacing: -.5px;
  color: #fff;
}

.section-desc {
  margin-top: 18px;
  color: var(--text-2);
  font-size: 17px;
  max-width: 680px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 650;
  font-size: 15.5px;
  letter-spacing: .3px;
  cursor: pointer;
  transition: transform .25s var(--ease), box-shadow .3s var(--ease),
              background .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease);
  white-space: nowrap;
}
.btn-sm { padding: 9px 18px; font-size: 14.5px; }
.btn-lg { padding: 15px 32px; font-size: 16.5px; }
.btn-block { width: 100%; }

.btn-primary {
  background: var(--grad-brand);
  color: #06111f;
  box-shadow: 0 14px 34px -14px rgba(91, 140, 255, .85);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 44px -14px rgba(91, 140, 255, .95);
}

.btn-ghost {
  background: rgba(255, 255, 255, .04);
  border-color: var(--border-2);
  color: var(--text);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  transform: translateY(-2px);
  border-color: rgba(34, 211, 238, .65);
  background: rgba(34, 211, 238, .08);
  color: #fff;
}

/* =========================================================
   顶部导航
   ========================================================= */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background .35s var(--ease), border-color .35s var(--ease), backdrop-filter .35s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(6, 9, 19, .82);
  border-bottom-color: var(--border);
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

/* 品牌 */
.brand { display: inline-flex; align-items: center; gap: 12px; }

/* Logo 承载框：圆角方形底 + 沿外圈转动的光带（科技感外环） */
@property --ring-angle {
  syntax: "<angle>";
  initial-value: 0deg;
  inherits: false;
}

.brand-badge {
  position: relative;
  flex: none;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
}
/* 静态外框（给转动光带一个"跑道"） */
.brand-badge::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 32%;
  border: 1px solid rgba(255, 255, 255, .13);
  background: rgba(255, 255, 255, .03);
  pointer-events: none;
}
/* 转动光带：conic 渐变沿圆角方框循环流动 */
.brand-ring {
  position: absolute;
  inset: 0;
  border-radius: 32%;
  padding: 2px;
  background: conic-gradient(
    from var(--ring-angle, 0deg),
    rgba(34, 211, 238, 0)   0deg,
    rgba(34, 211, 238, 0) 186deg,
    rgba(34, 211, 238, .30) 244deg,
    rgba(34, 211, 238, .95) 302deg,
    rgba(91, 140, 255, 1)   332deg,
    rgba(168, 85, 247, 1)   360deg
  );
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  animation: ring-orbit 5.5s linear infinite;
  pointer-events: none;
}
@keyframes ring-orbit {
  to { --ring-angle: 360deg; }
}

.brand-mark {
  position: relative;
  z-index: 1;
  width: 30px;
  height: 30px;
  flex: none;
  object-fit: contain;
  filter: drop-shadow(0 0 10px rgba(91, 140, 255, .5));
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 17px; font-weight: 800; letter-spacing: .5px; color: #fff; }
.brand-text em {
  font-style: normal;
  font-size: 10.5px;
  letter-spacing: 2.4px;
  color: var(--muted);
  text-transform: uppercase;
}

/* 菜单 */
.nav { display: flex; align-items: center; gap: 30px; }
.nav-list { display: flex; align-items: center; gap: 4px; }
.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 550;
  color: var(--text-2);
  border-radius: 999px;
  transition: color .25s var(--ease), background .25s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-brand);
  transform: translateX(-50%);
  transition: width .3s var(--ease);
}
.nav-link:hover { color: #fff; }
.nav-link:hover::after,
.nav-link.is-active::after { width: 60%; }
.nav-link.is-active { color: #fff; }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255,255,255,.04);
  padding: 0;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 12px;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform .3s var(--ease), opacity .25s var(--ease), top .3s var(--ease);
}
.nav-toggle span:nth-child(1) { top: 15px; }
.nav-toggle span:nth-child(2) { top: 21px; }
.nav-toggle span:nth-child(3) { top: 27px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { top: 21px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { top: 21px; transform: rotate(-45deg); }

/* =========================================================
   首屏 Hero
   ========================================================= */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-h) + 40px);
  padding-bottom: 90px;
  overflow: hidden;
}

.hero-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }

.grid-layer {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(122, 162, 255, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122, 162, 255, .055) 1px, transparent 1px);
  background-size: 58px 58px;
  background-position: center;
  -webkit-mask-image: radial-gradient(ellipse 78% 62% at 50% 38%, #000 32%, transparent 76%);
  mask-image: radial-gradient(ellipse 78% 62% at 50% 38%, #000 32%, transparent 76%);
}

.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .55;
  animation: float 14s var(--ease) infinite;
}
.glow-1 { width: 520px; height: 520px; top: -140px; left: -120px;  background: radial-gradient(circle, rgba(34,211,238,.55), transparent 68%); }
.glow-2 { width: 560px; height: 560px; top: -80px;  right: -150px; background: radial-gradient(circle, rgba(168,85,247,.5),  transparent 68%); animation-delay: -4s; }
.glow-3 { width: 620px; height: 620px; bottom: -260px; left: 34%;  background: radial-gradient(circle, rgba(91,140,255,.4),  transparent 70%); animation-delay: -8s; }

@keyframes float {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50%      { transform: translate3d(24px, -28px, 0) scale(1.06); }
}

.hero-inner { text-align: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border: 1px solid var(--border-2);
  border-radius: 999px;
  background: rgba(255, 255, 255, .04);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 30px;
}
.eyebrow .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand-1);
  box-shadow: 0 0 0 0 rgba(34, 211, 238, .75);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(34, 211, 238, .7); }
  70%  { box-shadow: 0 0 0 11px rgba(34, 211, 238, 0); }
  100% { box-shadow: 0 0 0 0 rgba(34, 211, 238, 0); }
}

.hero-title {
  font-size: clamp(34px, 6.2vw, 68px);
  line-height: 1.16;
  font-weight: 850;
  letter-spacing: -1.2px;
  color: #fff;
  margin-bottom: 26px;
}

.hero-sub {
  max-width: 720px;
  margin: 0 auto;
  font-size: clamp(16px, 1.5vw, 18.5px);
  color: var(--text-2);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-top: 40px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 54px;
}
.hero-tags li {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, .035);
  font-size: 14px;
  color: var(--text-2);
  transition: border-color .3s var(--ease), color .3s var(--ease), transform .3s var(--ease);
}
.hero-tags li:hover {
  transform: translateY(-2px);
  border-color: rgba(34, 211, 238, .5);
  color: #fff;
}

.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  z-index: 2;
}
.hero-scroll .mouse {
  display: block;
  width: 24px;
  height: 40px;
  border: 1.5px solid var(--border-2);
  border-radius: 14px;
  position: relative;
}
.hero-scroll .mouse::after {
  content: "";
  position: absolute;
  top: 8px;
  left: 50%;
  width: 3px;
  height: 7px;
  border-radius: 3px;
  background: var(--brand-1);
  transform: translateX(-50%);
  animation: wheel 1.8s infinite;
}
@keyframes wheel {
  0%   { opacity: 0; transform: translate(-50%, 0); }
  35%  { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, 11px); }
}

/* =========================================================
   主营业务卡片
   ========================================================= */
.cards-grid {
  display: grid;
  gap: 22px;
}
.services-grid { grid-template-columns: repeat(3, 1fr); }

.card {
  position: relative;
  padding: 32px 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255,255,255,.045), rgba(255,255,255,.012));
  overflow: hidden;
  transition: transform .35s var(--ease), border-color .35s var(--ease), box-shadow .35s var(--ease);
}
.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: var(--grad-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .45s var(--ease);
}
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(91, 140, 255, .4);
  box-shadow: var(--shadow-glow);
}
.card:hover::before { transform: scaleX(1); }

.card-feature {
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(91,140,255,.12), transparent 58%),
    linear-gradient(180deg, rgba(255,255,255,.055), rgba(255,255,255,.012));
  border-color: rgba(91, 140, 255, .3);
}

.card-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 11.5px;
  letter-spacing: 1.4px;
  font-weight: 700;
  color: #06111f;
  background: var(--grad-brand);
}

.card-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  border: 1px solid rgba(91, 140, 255, .32);
  background: rgba(91, 140, 255, .1);
  color: var(--brand-1);
  margin-bottom: 20px;
}
.card-icon svg { width: 26px; height: 26px; }

.card-title {
  font-size: 20.5px;
  font-weight: 750;
  color: #fff;
  margin-bottom: 12px;
}
.card-text { font-size: 15.5px; color: var(--text-2); }

.card-list {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
  display: grid;
  gap: 8px;
}
.card-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  color: var(--text-2);
}
.card-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand-1);
  box-shadow: 0 0 8px rgba(34, 211, 238, .8);
}

/* =========================================================
   核心优势
   ========================================================= */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.adv {
  position: relative;
  padding: 30px 26px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.01));
  transition: transform .35s var(--ease), border-color .35s var(--ease), background .35s var(--ease);
}
.adv:hover {
  transform: translateY(-6px);
  border-color: rgba(168, 85, 247, .42);
  background: linear-gradient(180deg, rgba(168,85,247,.08), rgba(255,255,255,.012));
}
.adv-num {
  display: block;
  font-size: 30px;
  font-weight: 850;
  letter-spacing: 1px;
  line-height: 1;
  margin-bottom: 18px;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.adv h3 { font-size: 18.5px; font-weight: 750; color: #fff; margin-bottom: 10px; }
.adv p { font-size: 15px; color: var(--text-2); }

/* =========================================================
   交付流程
   ========================================================= */
.process-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 30px 26px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255,255,255,.028);
  transition: transform .35s var(--ease), border-color .35s var(--ease);
}
.step:hover { transform: translateY(-6px); border-color: rgba(34, 211, 238, .42); }

.step-dot {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-weight: 800;
  font-size: 17px;
  color: #06111f;
  background: var(--grad-brand);
  margin-bottom: 18px;
  box-shadow: 0 10px 26px -12px rgba(91, 140, 255, .9);
}
.step h3 { font-size: 18px; font-weight: 750; color: #fff; margin-bottom: 9px; }
.step p { font-size: 14.8px; color: var(--text-2); }

/* 流程连线（桌面端） */
@media (min-width: 1025px) {
  .step::after {
    content: "";
    position: absolute;
    top: 52px;
    right: -22px;
    width: 22px;
    height: 1px;
    background: linear-gradient(90deg, rgba(91,140,255,.65), transparent);
  }
  .step:last-child::after { display: none; }
}

/* =========================================================
   关于我们
   ========================================================= */
.about-inner {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 54px;
  align-items: start;
}
.about-copy .section-title { margin-bottom: 22px; }
.about-copy p { color: var(--text-2); margin-bottom: 16px; font-size: 16.5px; }
.about-copy strong { color: #fff; font-weight: 700; }

.about-points {
  display: grid;
  gap: 12px;
  margin: 26px 0 32px;
}
.about-points li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 16px;
  color: var(--text);
}
.tick {
  flex: none;
  width: 20px;
  height: 20px;
  margin-top: 5px;
  border-radius: 50%;
  background: rgba(34, 211, 238, .14);
  border: 1px solid rgba(34, 211, 238, .5);
  position: relative;
}
.tick::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 5px;
  width: 5px;
  height: 9px;
  border: solid var(--brand-1);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.about-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.012));
  padding: 12px 26px;
  box-shadow: var(--shadow-soft);
}
.panel-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 17px 0;
  border-bottom: 1px solid var(--border);
}
.panel-row:last-child { border-bottom: none; }
.panel-k { font-size: 14px; color: var(--muted); flex: none; letter-spacing: .6px; }
.panel-v { font-size: 15.5px; color: var(--text); font-weight: 600; text-align: right; }

/* =========================================================
   联系我们
   ========================================================= */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 40px;
  align-items: start;
}

.contact-info { display: grid; gap: 14px; }

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,.028);
  transition: border-color .3s var(--ease), background .3s var(--ease), transform .3s var(--ease);
}
a.contact-item:hover {
  border-color: rgba(34, 211, 238, .5);
  background: rgba(34, 211, 238, .06);
  transform: translateX(4px);
}
.ci-icon {
  flex: none;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  border: 1px solid rgba(91, 140, 255, .3);
  background: rgba(91, 140, 255, .1);
  color: var(--brand-1);
}
.ci-icon svg { width: 22px; height: 22px; }
.ci-body { display: flex; flex-direction: column; gap: 2px; }
.ci-body em { font-style: normal; font-size: 13px; color: var(--muted); letter-spacing: .8px; }
.ci-body strong { font-size: 16px; font-weight: 650; color: #fff; }

.contact-tip {
  margin-top: 6px;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  border: 1px dashed rgba(168, 85, 247, .35);
  background: rgba(168, 85, 247, .07);
  font-size: 14.5px;
  color: var(--text-2);
}

/* 表单 */
.contact-form {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.012));
  padding: 32px 30px;
  box-shadow: var(--shadow-soft);
}
.field { margin-bottom: 18px; }
.field label {
  display: block;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: .4px;
}
.req { color: var(--brand-1); }

.field input,
.field textarea {
  width: 100%;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-2);
  background: rgba(4, 7, 15, .6);
  color: #fff;
  font-size: 15.5px;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease);
}
.field input::placeholder,
.field textarea::placeholder { color: #6b7793; }
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--brand-1);
  background: rgba(4, 7, 15, .85);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, .13);
}
.field textarea { resize: vertical; min-height: 108px; }

.field.has-error input,
.field.has-error textarea { border-color: #ff6b81; box-shadow: 0 0 0 4px rgba(255,107,129,.12); }

.field-err {
  margin-top: 6px;
  font-size: 13px;
  color: #ff8896;
  min-height: 0;
}

.form-note {
  margin-top: 14px;
  font-size: 14.5px;
  font-weight: 600;
  min-height: 22px;
}
.form-note.ok  { color: #34e2b0; }
.form-note.err { color: #ff8896; }

.form-caption {
  margin-top: 8px;
  font-size: 12.8px;
  color: var(--muted);
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,.02), transparent);
  padding-top: 62px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  padding-bottom: 46px;
}
.footer-desc {
  margin-top: 18px;
  font-size: 14.8px;
  color: var(--text-2);
  max-width: 400px;
}
.footer-nav { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.footer-col h4 {
  font-size: 14px;
  letter-spacing: 1.6px;
  color: var(--muted);
  margin-bottom: 16px;
  text-transform: uppercase;
  font-weight: 700;
}
.footer-col ul { display: grid; gap: 11px; }
.footer-col a {
  font-size: 15px;
  color: var(--text-2);
  transition: color .25s var(--ease), padding-left .25s var(--ease);
}
.footer-col a:hover { color: var(--brand-1); padding-left: 5px; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 22px 24px 30px;
  border-top: 1px solid var(--border);
  font-size: 13.5px;
  color: var(--muted);
}

/* =========================================================
   回到顶部
   ========================================================= */
.to-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 90;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--border-2);
  background: rgba(9, 14, 28, .85);
  color: var(--text);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s;
}
.to-top.is-show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { border-color: var(--brand-1); color: var(--brand-1); }
.to-top svg { width: 20px; height: 20px; }

/* =========================================================
   进场动画
   ========================================================= */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
  will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: none; }

/* =========================================================
   响应式 —— 平板
   ========================================================= */
@media (max-width: 1024px) {
  .section { padding: 82px 0; }

  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .process-list { grid-template-columns: repeat(2, 1fr); }

  .about-inner { grid-template-columns: 1fr; gap: 38px; }
  .contact-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-inner { grid-template-columns: 1fr; gap: 36px; }

  /* 导航收成抽屉 */
  .nav-toggle { display: block; }
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 18px 24px 26px;
    background: rgba(7, 10, 20, .97);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s;
    max-height: calc(100dvh - var(--header-h));
    overflow-y: auto;
  }
  .nav.is-open { opacity: 1; visibility: visible; transform: translateY(0); }
  .nav-list { flex-direction: column; align-items: stretch; gap: 2px; }
  .nav-link {
    padding: 14px 12px;
    border-radius: 10px;
    font-size: 16.5px;
    border-bottom: 1px solid rgba(255,255,255,.05);
  }
  .nav-link::after { display: none; }
  .nav-link:hover { background: rgba(255,255,255,.05); }
  .nav-cta { margin-top: 12px; align-self: stretch; justify-content: center; padding: 14px; }
}

/* =========================================================
   响应式 —— 手机
   ========================================================= */
@media (max-width: 768px) {
  .container { padding-inline: 20px; }
  .section { padding: 68px 0; }
  .section-head { margin-bottom: 40px; }

  .hero { min-height: auto; padding-top: calc(var(--header-h) + 52px); padding-bottom: 76px; }
  .hero-scroll { display: none; }
  .eyebrow { font-size: 13px; padding: 7px 14px; }
  .hero-title { font-size: clamp(26px, 7.6vw, 36px); letter-spacing: -.5px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .hero-tags { margin-top: 40px; gap: 10px; }
  .hero-tags li { font-size: 13px; padding: 7px 13px; }

  .brand { gap: 10px; }
  .brand-badge { width: 36px; height: 36px; }
  .brand-mark { width: 27px; height: 27px; }
  .brand-text strong { font-size: 16px; }

  .services-grid,
  .advantage-grid,
  .process-list { grid-template-columns: 1fr; }

  .card { padding: 26px 22px; }
  .card-badge { top: 16px; right: 16px; }

  .about-panel { padding: 10px 20px; }
  .panel-row { flex-direction: column; align-items: flex-start; gap: 4px; }
  .panel-v { text-align: left; }

  .contact-form { padding: 26px 22px; }
  .contact-item { padding: 16px; }

  .footer-nav { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .to-top { right: 16px; bottom: 16px; width: 42px; height: 42px; }
}

/* 小屏微调 */
@media (max-width: 380px) {
  .hero-title { letter-spacing: -.6px; }
  .btn-lg { padding: 14px 22px; font-size: 15.5px; }
}

/* =========================================================
   无障碍：尊重系统「减少动态效果」
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* 打印友好 */
@media print {
  .site-header, .to-top, .hero-bg, .hero-scroll, .contact-form { display: none !important; }
  body { background: #fff; color: #111; }
  body::before { display: none; }
}