/* ==========================================================================
   铁马软件官网 · 设计系统
   Fonts / Colors / Layout / Components
   ========================================================================== */

:root {
  /* 背景层次 */
  --bg:        #070b16;
  --bg-soft:   #0b1120;
  --bg-elev:   #101830;

  /* 玻璃卡片 */
  --card:      rgba(255, 255, 255, .038);
  --card-hover:rgba(255, 255, 255, .065);
  --border:    rgba(255, 255, 255, .085);
  --border-lit:rgba(129, 160, 255, .35);

  /* 文字 */
  --text:      #e9edf8;
  --text-soft: #b9c3da;
  --muted:     #8d99b5;
  --faint:     #626e8a;

  /* 品牌色 */
  --brand:     #4d7cfe;
  --brand-2:   #7c5cff;
  --brand-3:   #b356ff;
  --cyan:      #22d3ee;
  --mint:      #34d399;
  --amber:     #fbbf24;

  --grad:      linear-gradient(120deg, #4d7cfe 0%, #7c5cff 48%, #b356ff 100%);
  --grad-soft: linear-gradient(120deg, rgba(77,124,254,.18), rgba(179,86,255,.14));
  --grad-cyan: linear-gradient(120deg, #22d3ee, #4d7cfe);

  /* 尺寸 */
  --wrap:      1200px;
  --nav-h:     68px;
  --r-sm:      10px;
  --r:         16px;
  --r-lg:      22px;
  --r-xl:      28px;

  --shadow:    0 18px 50px -18px rgba(0, 0, 0, .75);
  --shadow-lit:0 20px 60px -20px rgba(77, 124, 254, .5);

  --ease:      cubic-bezier(.4, 0, .2, 1);
  --ease-out:  cubic-bezier(.16, 1, .3, 1);
}

/* --------------------------------------------------------- reset */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 20px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei",
               "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { max-width: 100%; display: block; border: 0; }
a { color: inherit; text-decoration: none; transition: color .2s var(--ease); }
button { font: inherit; cursor: pointer; }
ul, ol { margin: 0; padding: 0; list-style: none; }

h1, h2, h3, h4 {
  margin: 0;
  line-height: 1.28;
  font-weight: 700;
  letter-spacing: -.01em;
}
p { margin: 0; }

::selection { background: rgba(124, 92, 255, .38); color: #fff; }

/* 全站背景光斑 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(760px 520px at 12% -6%,  rgba(77, 124, 254, .17), transparent 62%),
    radial-gradient(700px 480px at 88% 4%,   rgba(179, 86, 255, .13), transparent 62%),
    radial-gradient(900px 620px at 50% 108%, rgba(34, 211, 238, .07), transparent 66%);
}

/* --------------------------------------------------------- layout */
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

.section { position: relative; z-index: 1; padding: 96px 0; }
.section--tight { padding: 68px 0; }
.section--alt { background: linear-gradient(180deg, transparent, rgba(255,255,255,.022) 50%, transparent); }

.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* --------------------------------------------------------- 通用文字 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  margin-bottom: 20px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
  backdrop-filter: blur(10px);
}
.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
}

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section-head { max-width: 760px; margin: 0 auto 54px; text-align: center; }
.section-head h2 { font-size: clamp(27px, 3.6vw, 42px); }
.section-head p { margin-top: 16px; color: var(--muted); font-size: 16.5px; }
.section-head--left { margin-left: 0; text-align: left; }

.lead { color: var(--text-soft); font-size: 17.5px; line-height: 1.85; }
.muted { color: var(--muted); }

/* --------------------------------------------------------- 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  transition: transform .25s var(--ease-out), box-shadow .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease);
}
.btn:hover { transform: translateY(-2px); }

.btn--primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 12px 34px -12px rgba(109, 106, 255, .8);
}
.btn--primary:hover { box-shadow: 0 18px 44px -12px rgba(109, 106, 255, .95); }

.btn--ghost {
  background: var(--card);
  border-color: var(--border);
  color: var(--text);
  backdrop-filter: blur(10px);
}
.btn--ghost:hover { background: var(--card-hover); border-color: var(--border-lit); }

.btn--lg { padding: 16px 34px; font-size: 16px; }
.btn--sm { padding: 9px 18px; font-size: 13.5px; }

.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--cyan);
  font-size: 14.5px;
  font-weight: 600;
}
.link-arrow::after { content: "→"; transition: transform .25s var(--ease-out); }
.link-arrow:hover::after { transform: translateX(4px); }

/* --------------------------------------------------------- 卡片 */
.card {
  position: relative;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--card);
  backdrop-filter: blur(14px);
  transition: transform .35s var(--ease-out), border-color .35s var(--ease), background .35s var(--ease), box-shadow .35s var(--ease);
  overflow: hidden;
}
.card::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.28), transparent);
  opacity: 0;
  transition: opacity .35s var(--ease);
}
.card:hover {
  transform: translateY(-6px);
  border-color: var(--border-lit);
  background: var(--card-hover);
  box-shadow: var(--shadow);
}
.card:hover::after { opacity: 1; }

.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p  { color: var(--muted); font-size: 14.8px; line-height: 1.8; }

.card-ico {
  display: grid;
  place-items: center;
  width: 50px; height: 50px;
  margin-bottom: 18px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--grad-soft);
  font-size: 23px;
}

.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.tag {
  padding: 4px 11px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255,255,255,.03);
  color: var(--text-soft);
  font-size: 12.5px;
}

/* --------------------------------------------------------- 导航 */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  border-bottom: 1px solid transparent;
  transition: background .3s var(--ease), border-color .3s var(--ease), backdrop-filter .3s var(--ease);
}
.nav.is-stuck {
  background: rgba(7, 11, 22, .82);
  border-bottom-color: var(--border);
  backdrop-filter: blur(18px) saturate(160%);
}
.nav__inner {
  display: flex;
  align-items: center;
  gap: 18px;
  height: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.logo { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.logo__img { display: block; height: 44px; width: auto; }
.logo__txt { font-size: 17.5px; font-weight: 700; letter-spacing: .02em; }
.logo__sub { display: block; color: var(--faint); font-size: 10.5px; font-weight: 500; letter-spacing: .16em; line-height: 1; }

.nav__menu { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav__item { position: relative; }
.nav__link {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 9px 14px;
  border-radius: 10px;
  color: var(--text-soft);
  font-size: 15px;
  font-weight: 500;
}
.nav__link:hover, .nav__item:hover > .nav__link { color: var(--text); background: var(--card); }
.nav__link.is-active { color: var(--text); }
.nav__link.is-active::before {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad);
}
.nav__link--caret::after {
  content: "";
  width: 5px; height: 5px;
  border-right: 1.6px solid currentColor;
  border-bottom: 1.6px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
  opacity: .6;
  transition: transform .25s var(--ease);
}
.nav__item:hover .nav__link--caret::after { transform: rotate(225deg) translateY(-2px); }

/* 下拉面板 */
.dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  min-width: 260px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: rgba(12, 18, 34, .96);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, 8px);
  transition: opacity .22s var(--ease), transform .22s var(--ease-out), visibility .22s;
}
.nav__item:hover .dropdown,
.nav__item:focus-within .dropdown { opacity: 1; visibility: visible; transform: translate(-50%, 0); }

.dropdown--wide { min-width: 520px; display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }

.dropdown a {
  display: block;
  padding: 9px 13px;
  border-radius: 10px;
  color: var(--text-soft);
  font-size: 14.3px;
}
.dropdown a:hover { background: var(--card-hover); color: var(--text); }
.dropdown a b { display: block; color: var(--text); font-size: 14.3px; font-weight: 600; }
.dropdown a span { display: block; color: var(--faint); font-size: 12.3px; line-height: 1.5; }
.dropdown__label {
  grid-column: 1 / -1;
  padding: 8px 13px 4px;
  color: var(--faint);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .12em;
}

.nav__cta { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.nav__tel { display: flex; align-items: center; gap: 7px; color: var(--text); font-size: 15px; font-weight: 700; }
.nav__tel span { color: var(--faint); font-size: 11.5px; font-weight: 500; }

/* 汉堡 */
.nav__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px; height: 42px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--card);
}
.nav__burger i { display: block; height: 1.8px; background: var(--text); border-radius: 2px; transition: transform .28s var(--ease), opacity .2s; }
.nav__burger.is-open i:nth-child(1) { transform: translateY(6.8px) rotate(45deg); }
.nav__burger.is-open i:nth-child(2) { opacity: 0; }
.nav__burger.is-open i:nth-child(3) { transform: translateY(-6.8px) rotate(-45deg); }

/* 移动端抽屉 */
.drawer {
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  z-index: 99;
  padding: 20px 24px 60px;
  background: rgba(7, 11, 22, .985);
  backdrop-filter: blur(20px);
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity .28s var(--ease), transform .28s var(--ease-out), visibility .28s;
}
.drawer.is-open { opacity: 1; visibility: visible; transform: translateY(0); }
.drawer__group { border-bottom: 1px solid var(--border); }
.drawer__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 15px 2px;
  border: 0;
  background: none;
  color: var(--text);
  font-size: 16.5px;
  font-weight: 600;
  text-align: left;
}
.drawer__top i { color: var(--faint); font-style: normal; transition: transform .25s var(--ease); }
.drawer__group.is-open .drawer__top i { transform: rotate(45deg); }
.drawer__sub { display: none; padding: 0 0 14px 2px; }
.drawer__group.is-open .drawer__sub { display: block; }
.drawer__sub a { display: block; padding: 8px 0; color: var(--muted); font-size: 14.6px; }
.drawer__sub a:hover { color: var(--cyan); }
.drawer__foot { margin-top: 26px; display: grid; gap: 12px; }

/* --------------------------------------------------------- Hero */
.hero {
  position: relative;
  z-index: 1;
  padding: calc(var(--nav-h) + 92px) 0 96px;
  overflow: hidden;
}
.hero__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size: 62px 62px;
  mask-image: radial-gradient(ellipse 90% 62% at 50% 22%, #000 20%, transparent 76%);
  -webkit-mask-image: radial-gradient(ellipse 90% 62% at 50% 22%, #000 20%, transparent 76%);
}
.hero__inner { position: relative; }
.hero--center { text-align: center; }
.hero--center .hero__copy { max-width: 880px; margin: 0 auto; }
.hero--center .btn-row { justify-content: center; }

.hero__cols {
  display: grid;
  grid-template-columns: 1.06fr .94fr;
  gap: 60px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(34px, 5.4vw, 62px);
  line-height: 1.16;
  letter-spacing: -.02em;
}
.hero h1 em { font-style: normal; }
.hero__sub {
  max-width: 620px;
  margin-top: 24px;
  color: var(--text-soft);
  font-size: clamp(16px, 1.5vw, 18.5px);
  line-height: 1.85;
}
.hero .btn-row { margin-top: 36px; }
.hero__note { margin-top: 20px; color: var(--faint); font-size: 13.5px; }

/* 页面小 Hero */
.phero {
  position: relative;
  z-index: 1;
  padding: calc(var(--nav-h) + 74px) 0 56px;
  text-align: center;
}
.phero h1 { font-size: clamp(30px, 4.4vw, 48px); }
.phero p { max-width: 720px; margin: 20px auto 0; color: var(--muted); font-size: 17px; }
.crumb { margin-bottom: 22px; color: var(--faint); font-size: 13.5px; }
.crumb a:hover { color: var(--cyan); }
.crumb i { margin: 0 8px; font-style: normal; opacity: .5; }

/* --------------------------------------------------------- 数据条 */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--r-lg); overflow: hidden; }
.stat { padding: 30px 24px; background: var(--bg-soft); text-align: center; }
.stat__num { font-size: clamp(28px, 3.4vw, 40px); font-weight: 800; letter-spacing: -.02em; line-height: 1.1; }
.stat__lbl { margin-top: 8px; color: var(--muted); font-size: 14px; }

/* --------------------------------------------------------- AI 终端演示 */
.term {
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, rgba(16,24,48,.94), rgba(8,12,24,.94));
  box-shadow: var(--shadow-lit);
  overflow: hidden;
}
.term__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 13px 18px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,.03);
}
.term__dot { width: 10px; height: 10px; border-radius: 50%; }
.term__dot:nth-child(1) { background: #ff5f57; }
.term__dot:nth-child(2) { background: #febc2e; }
.term__dot:nth-child(3) { background: #28c840; }
.term__title { margin-left: 8px; color: var(--muted); font-size: 12.8px; font-weight: 600; }
.term__body { padding: 22px; min-height: 314px; display: flex; flex-direction: column; gap: 14px; }

.msg { display: flex; gap: 11px; max-width: 92%; animation: msgIn .45s var(--ease-out) both; }
.msg--me { align-self: flex-end; flex-direction: row-reverse; }
.msg__av {
  display: grid; place-items: center;
  flex-shrink: 0;
  width: 32px; height: 32px;
  border-radius: 10px;
  font-size: 14px;
  border: 1px solid var(--border);
}
.msg--ai .msg__av { background: var(--grad); color: #fff; border-color: transparent; }
.msg--me .msg__av { background: rgba(255,255,255,.06); }
.msg__bubble {
  padding: 11px 15px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(255,255,255,.045);
  color: var(--text-soft);
  font-size: 14.3px;
  line-height: 1.72;
}
.msg--me .msg__bubble { background: rgba(77,124,254,.16); border-color: rgba(77,124,254,.32); color: var(--text); }
.msg__bubble b { color: var(--text); font-weight: 600; }
.msg__bubble .k { color: var(--cyan); font-weight: 600; }
.msg__meta { margin-top: 7px; padding-top: 7px; border-top: 1px dashed var(--border); color: var(--faint); font-size: 12px; }

@keyframes msgIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

.typing { display: inline-flex; gap: 4px; padding: 4px 0; }
.typing i { width: 6px; height: 6px; border-radius: 50%; background: var(--muted); animation: blink 1.3s infinite; }
.typing i:nth-child(2) { animation-delay: .18s; }
.typing i:nth-child(3) { animation-delay: .36s; }
@keyframes blink { 0%,60%,100% { opacity: .25; transform: none; } 30% { opacity: 1; transform: translateY(-3px); } }

/* --------------------------------------------------------- 特色板块 */
.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.feature--flip .feature__media { order: -1; }
.feature + .feature { margin-top: 96px; }

.checklist { display: grid; gap: 13px; margin-top: 26px; }
.checklist li { display: flex; gap: 12px; color: var(--text-soft); font-size: 15.3px; line-height: 1.7; }
.checklist li::before {
  content: "✓";
  flex-shrink: 0;
  display: grid; place-items: center;
  width: 21px; height: 21px;
  margin-top: 3px;
  border-radius: 6px;
  background: rgba(52,211,153,.14);
  color: var(--mint);
  font-size: 12px;
  font-weight: 700;
}
.checklist li b { color: var(--text); font-weight: 600; }

/* 大特色卡（AI 页） */
.aicard {
  position: relative;
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 20px;
  padding: 30px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--card);
  backdrop-filter: blur(14px);
  transition: transform .35s var(--ease-out), border-color .35s var(--ease), background .35s var(--ease);
}
.aicard:hover { transform: translateY(-5px); border-color: var(--border-lit); background: var(--card-hover); }
.aicard__ico {
  display: grid; place-items: center;
  width: 62px; height: 62px;
  border-radius: 17px;
  background: var(--grad-soft);
  border: 1px solid var(--border);
  font-size: 27px;
}
.aicard h3 { font-size: 20px; }
.aicard__kicker { display: block; margin-bottom: 4px; color: var(--cyan); font-size: 12.5px; font-weight: 700; letter-spacing: .1em; }
.aicard p { margin-top: 10px; color: var(--muted); font-size: 14.8px; line-height: 1.82; }
.aicard ul { display: grid; gap: 8px; margin-top: 16px; }
.aicard ul li { position: relative; padding-left: 16px; color: var(--text-soft); font-size: 14.2px; }
.aicard ul li::before { content: ""; position: absolute; left: 0; top: 10px; width: 6px; height: 6px; border-radius: 50%; background: var(--brand-2); }

/* --------------------------------------------------------- 流程 */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: s; }
.step { position: relative; padding: 28px 24px; border: 1px solid var(--border); border-radius: var(--r-lg); background: var(--card); counter-increment: s; }
.step::before {
  content: counter(s, decimal-leading-zero);
  display: block;
  margin-bottom: 14px;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-size: 30px; font-weight: 800; letter-spacing: -.02em;
}
.step h3 { font-size: 17.5px; margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 14.3px; }

/* --------------------------------------------------------- 行业 / 客户 */
.chip-grid { display: flex; flex-wrap: wrap; gap: 11px; }
.chip {
  padding: 10px 19px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  color: var(--text-soft);
  font-size: 14.5px;
  transition: all .25s var(--ease);
}
.chip:hover { border-color: var(--border-lit); background: var(--card-hover); color: var(--text); transform: translateY(-2px); }

.logo-wall { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--r); overflow: hidden; }
.logo-wall div {
  display: grid; place-items: center;
  padding: 24px 12px;
  background: var(--bg-soft);
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  text-align: center;
  transition: color .25s var(--ease), background .25s var(--ease);
}
.logo-wall div:hover { color: var(--text); background: var(--bg-elev); }

/* 案例 */
.case { display: flex; flex-direction: column; }
.case__top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.case__badge { padding: 4px 11px; border-radius: 999px; background: var(--grad-soft); border: 1px solid var(--border); color: var(--text-soft); font-size: 12.3px; font-weight: 600; }
.case__kpi { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--border); }
.case__kpi b { display: block; background: var(--grad-cyan); -webkit-background-clip: text; background-clip: text; color: transparent; font-size: 21px; font-weight: 800; }
.case__kpi span { color: var(--faint); font-size: 12.4px; }

/* --------------------------------------------------------- 价格 */
.price { display: flex; flex-direction: column; }
.price--hot { border-color: var(--border-lit); background: linear-gradient(170deg, rgba(77,124,254,.1), var(--card)); }
.price__flag { position: absolute; top: 18px; right: 18px; padding: 3px 10px; border-radius: 999px; background: var(--grad); color: #fff; font-size: 11.5px; font-weight: 700; }
.price__name { font-size: 18px; font-weight: 700; }
.price__desc { margin: 8px 0 18px; color: var(--muted); font-size: 14px; min-height: 44px; }
.price__amt { display: flex; align-items: baseline; gap: 6px; padding-bottom: 20px; border-bottom: 1px solid var(--border); }
.price__amt b { font-size: 32px; font-weight: 800; letter-spacing: -.02em; }
.price__amt span { color: var(--faint); font-size: 13.5px; }
.price ul { display: grid; gap: 11px; padding: 20px 0 24px; }
.price ul li { display: flex; gap: 10px; color: var(--text-soft); font-size: 14.2px; }
.price ul li::before { content: "✓"; color: var(--mint); font-weight: 700; }
.price .btn { margin-top: auto; width: 100%; }

/* --------------------------------------------------------- FAQ */
.faq { max-width: 860px; margin: 0 auto; display: grid; gap: 12px; }
.faq__item { border: 1px solid var(--border); border-radius: var(--r); background: var(--card); overflow: hidden; transition: border-color .25s var(--ease); }
.faq__item[open] { border-color: var(--border-lit); }
.faq__item summary {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 19px 24px;
  color: var(--text);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: "+";
  flex-shrink: 0;
  color: var(--cyan);
  font-size: 20px;
  font-weight: 400;
  transition: transform .28s var(--ease);
}
.faq__item[open] summary::after { transform: rotate(45deg); }
.faq__body { padding: 0 24px 21px; color: var(--muted); font-size: 14.8px; line-height: 1.85; }

/* --------------------------------------------------------- 表单 */
.form { display: grid; gap: 16px; }
.field { display: grid; gap: 7px; }
.field label { color: var(--text-soft); font-size: 13.8px; font-weight: 600; }
.field label i { color: var(--brand-3); font-style: normal; }
.field input, .field select, .field textarea {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255,255,255,.04);
  color: var(--text);
  font: inherit;
  font-size: 15px;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}
.field textarea { min-height: 104px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--brand);
  background: rgba(77,124,254,.07);
}
.field input::placeholder, .field textarea::placeholder { color: var(--faint); }
.field select option { background: var(--bg-elev); color: var(--text); }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form__tip { color: var(--faint); font-size: 13px; }
.form__ok {
  display: none;
  padding: 13px 16px;
  border: 1px solid rgba(52,211,153,.35);
  border-radius: 12px;
  background: rgba(52,211,153,.1);
  color: var(--mint);
  font-size: 14.5px;
}
.form__ok.is-show { display: block; }

/* --------------------------------------------------------- CTA 区 */
.cta {
  position: relative;
  z-index: 1;
  padding: 64px 48px;
  border: 1px solid var(--border-lit);
  border-radius: var(--r-xl);
  background:
    radial-gradient(600px 260px at 20% 0%, rgba(77,124,254,.2), transparent 65%),
    radial-gradient(600px 260px at 85% 100%, rgba(179,86,255,.16), transparent 65%),
    var(--bg-soft);
  text-align: center;
  overflow: hidden;
}
.cta h2 { font-size: clamp(26px, 3.4vw, 38px); }
.cta p { max-width: 620px; margin: 16px auto 32px; color: var(--text-soft); font-size: 16.5px; }
.cta .btn-row { justify-content: center; }

/* --------------------------------------------------------- 页脚 */
.foot { position: relative; z-index: 1; margin-top: 40px; border-top: 1px solid var(--border); background: rgba(255,255,255,.015); }
.foot__main { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr 1.1fr; gap: 40px; padding: 62px 0 46px; }
.foot__about p { margin-top: 18px; max-width: 300px; color: var(--muted); font-size: 14.2px; line-height: 1.8; }
.foot__badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.foot h4 { margin-bottom: 18px; color: var(--text); font-size: 14.5px; font-weight: 700; letter-spacing: .04em; }
.foot ul { display: grid; gap: 11px; }
.foot ul a { color: var(--muted); font-size: 14.2px; }
.foot ul a:hover { color: var(--cyan); }
.foot__contact li { display: flex; gap: 10px; color: var(--muted); font-size: 14.2px; line-height: 1.7; }
.foot__contact li b { color: var(--text); font-weight: 600; }
.foot__contact li em { flex-shrink: 0; font-style: normal; opacity: .8; }
.foot__tel { display: block; margin-bottom: 4px; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; font-size: 24px; font-weight: 800; letter-spacing: -.01em; }
.foot__bar {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px;
  padding: 22px 0;
  border-top: 1px solid var(--border);
  color: var(--faint);
  font-size: 13.2px;
}
.foot__bar nav { display: flex; flex-wrap: wrap; gap: 18px; }
.foot__bar a:hover { color: var(--text-soft); }

/* --------------------------------------------------------- 侧边悬浮 */
.dock { position: fixed; right: 18px; bottom: 88px; z-index: 90; display: grid; gap: 10px; }
.dock__btn {
  position: relative;
  display: grid; place-items: center;
  width: 46px; height: 46px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(12,18,34,.9);
  color: var(--text-soft);
  font-size: 18px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  transition: all .25s var(--ease);
}
.dock__btn:hover { color: #fff; background: var(--grad); border-color: transparent; transform: translateY(-2px); }
.dock__btn::after {
  content: attr(data-tip);
  position: absolute;
  right: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%) translateX(6px);
  padding: 6px 11px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: rgba(12,18,34,.97);
  color: var(--text);
  font-size: 12.6px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s var(--ease), transform .22s var(--ease-out);
}
.dock__btn:hover::after { opacity: 1; transform: translateY(-50%) translateX(0); }
.dock__btn--top { opacity: 0; visibility: hidden; }
.dock__btn--top.is-show { opacity: 1; visibility: visible; }

/* 底部移动条 */
.mbar {
  display: none;
  position: fixed; left: 0; right: 0; bottom: 0;
  z-index: 95;
  border-top: 1px solid var(--border);
  background: rgba(7,11,22,.95);
  backdrop-filter: blur(18px);
}
.mbar div { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 10px 14px; }
.mbar .btn { width: 100%; }

/* --------------------------------------------------------- 入场动画 */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s var(--ease-out), transform .7s var(--ease-out); }
.reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* --------------------------------------------------------- 响应式 */
@media (max-width: 1080px) {
  .nav__menu, .nav__tel { display: none; }
  .nav__burger { display: flex; }
  .nav__cta { margin-left: auto; gap: 10px; }
  .hero__cols, .feature { grid-template-columns: 1fr; gap: 42px; }
  .feature--flip .feature__media { order: 0; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .foot__main { grid-template-columns: 1fr 1fr 1fr; gap: 34px; }
  .foot__about { grid-column: 1 / -1; }
  .logo-wall { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 720px) {
  .section { padding: 66px 0; }
  .hero { padding: calc(var(--nav-h) + 56px) 0 66px; }
  .phero { padding: calc(var(--nav-h) + 46px) 0 34px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; }
  .cta { padding: 44px 24px; }
  .aicard { grid-template-columns: 1fr; gap: 16px; }
  .foot__main { grid-template-columns: 1fr 1fr; }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .dock { bottom: 78px; }
  .dock__btn { width: 42px; height: 42px; font-size: 16px; }
  .mbar { display: block; }
  body { padding-bottom: 66px; }
  .nav__cta .btn { padding: 9px 16px; font-size: 13.5px; }
  .logo__sub { display: none; }
  .logo__img { height: 38px; }
  .btn--lg { padding: 14px 26px; font-size: 15px; }
}

@media (max-width: 420px) {
  .wrap { padding: 0 18px; }
  .stats { grid-template-columns: 1fr; }
}