/* =========================================================
   广州浩通智能科技有限公司 — 工业科技风样式表
   ========================================================= */

:root {
  --bg: #070A12;
  --bg-alt: #0A0F1B;
  --surface: rgba(255, 255, 255, 0.038);
  --surface-2: rgba(255, 255, 255, 0.062);
  --line: rgba(255, 255, 255, 0.09);
  --line-soft: rgba(255, 255, 255, 0.055);

  --text: #E9EEF9;
  --text-2: #A9B4C9;
  --text-3: #6F7B91;

  --blue: #3D7BFF;
  --cyan: #4FD8F5;
  --hot: #FF9A3D;
  --hot-2: #FFC46B;

  --grad: linear-gradient(120deg, #3D7BFF 0%, #4FD8F5 100%);
  --grad-hot: linear-gradient(120deg, #FF9A3D 0%, #FFC46B 100%);

  --radius: 20px;
  --radius-sm: 13px;
  --radius-lg: 28px;

  --shadow: 0 24px 60px -22px rgba(0, 0, 0, 0.85);
  --maxw: 1180px;

  --ease: cubic-bezier(0.22, 0.68, 0.32, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 { margin: 0; line-height: 1.26; letter-spacing: -0.02em; font-weight: 700; }
p { margin: 0; }
ul, ol, dl, dd, dt, figure, blockquote { margin: 0; padding: 0; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.container.narrow { max-width: 830px; }

b, strong { font-weight: 600; }

/* ---------------- 背景光效 ---------------- */
.bg-layer { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }

.bg-grid {
  position: absolute; inset: -2px;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.033) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.033) 1px, transparent 1px);
  background-size: 68px 68px;
  mask-image: radial-gradient(ellipse 92% 64% at 50% 0%, #000 12%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 92% 64% at 50% 0%, #000 12%, transparent 78%);
}

.glow { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.5; }
.glow-a { width: 620px; height: 620px; top: -260px; left: -150px; background: radial-gradient(circle, rgba(61, 123, 255, 0.6), transparent 66%); }
.glow-b { width: 560px; height: 560px; top: -170px; right: -170px; background: radial-gradient(circle, rgba(79, 216, 245, 0.38), transparent 66%); }
.glow-hot { width: 520px; height: 520px; top: 220px; right: 6%; background: radial-gradient(circle, rgba(255, 154, 61, 0.2), transparent 68%); }

.noise {
  position: absolute; inset: 0; opacity: 0.16; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}

main, .nav, .footer { position: relative; z-index: 1; }

/* ---------------- 通用元素 ---------------- */
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.grad-hot-text {
  background: var(--grad-hot);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

.eyebrow {
  display: inline-block;
  font-size: 12px; font-weight: 700; letter-spacing: 0.22em;
  color: var(--cyan); opacity: 0.88; margin-bottom: 14px;
}

.sec-head { max-width: 760px; margin: 0 auto 54px; text-align: center; }
.sec-head h2 { font-size: clamp(26px, 3.6vw, 40px); margin-bottom: 16px; }
.sec-head p { color: var(--text-2); font-size: 16.5px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 26px; border-radius: 999px; border: 1px solid transparent;
  font-size: 15px; font-weight: 600; cursor: pointer;
  transition: transform 0.24s var(--ease), box-shadow 0.24s var(--ease), background 0.24s var(--ease), border-color 0.24s var(--ease);
  white-space: nowrap;
}
.btn-primary { background: var(--grad); color: #04101F; box-shadow: 0 12px 34px -12px rgba(61, 123, 255, 0.85); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 44px -14px rgba(79, 216, 245, 0.9); }
.btn-ghost { background: rgba(255, 255, 255, 0.045); border-color: var(--line); color: var(--text); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.085); transform: translateY(-2px); }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; box-shadow: none; }

/* ---------------- 导航 ---------------- */
.nav { position: sticky; top: 0; z-index: 60; transition: background 0.35s var(--ease), border-color 0.35s var(--ease); border-bottom: 1px solid transparent; }
.nav.is-stuck { background: rgba(7, 10, 18, 0.74); backdrop-filter: blur(18px) saturate(160%); -webkit-backdrop-filter: blur(18px) saturate(160%); border-bottom-color: var(--line-soft); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; min-height: 70px; gap: 20px; }

.brand { display: inline-flex; align-items: center; }
.brand-img { display: block; height: 38px; width: auto; }
.brand-img-sm { height: 33px; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a { padding: 9px 14px; border-radius: 999px; font-size: 14.5px; color: var(--text-2); transition: color 0.2s, background 0.2s; }
.nav-links a:hover { color: var(--text); background: rgba(255, 255, 255, 0.05); }
.nav-links .nav-cta { color: #04101F; background: var(--grad); font-weight: 600; margin-left: 8px; padding: 10px 20px; }
.nav-links .nav-cta:hover { background: var(--grad); color: #04101F; }

.nav-toggle { display: none; width: 42px; height: 42px; border-radius: 12px; background: rgba(255, 255, 255, 0.05); border: 1px solid var(--line); cursor: pointer; padding: 11px 10px; flex-direction: column; justify-content: space-between; }
.nav-toggle span { display: block; height: 2px; border-radius: 2px; background: var(--text); transition: transform 0.28s var(--ease), opacity 0.2s; }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ---------------- Hero ---------------- */
.hero { padding: 68px 0 40px; }
.hero-inner { display: grid; grid-template-columns: 1.06fr 0.94fr; gap: 56px; align-items: center; }

.pill {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 7px 16px 7px 12px; border-radius: 999px;
  background: rgba(79, 216, 245, 0.07); border: 1px solid rgba(79, 216, 245, 0.22);
  font-size: 13px; color: #BEE9F4; margin-bottom: 24px;
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 4px rgba(79, 216, 245, 0.16); animation: pulse 2.4s infinite; }
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 4px rgba(79, 216, 245, 0.16); } 50% { box-shadow: 0 0 0 9px rgba(79, 216, 245, 0); } }

.hero h1 { font-size: clamp(32px, 4.8vw, 56px); letter-spacing: -0.03em; margin-bottom: 22px; }
/* 「从规划到量产，一次交付」强制单行：段落内禁止折行（换行由前面的 <br> 负责），
   略缩字号（0.92em）确保在 1180px 容器、双栏布局下不溢出正文列 */
.hero h1 .h1-line2 { white-space: nowrap; font-size: 0.92em; }
.hero .lede { font-size: 16.5px; color: var(--text-2); max-width: 560px; margin-bottom: 32px; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 44px; }

.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; padding-top: 30px; border-top: 1px solid var(--line-soft); }
.hero-stats dt { font-size: 27px; font-weight: 700; letter-spacing: -0.02em; }
.hero-stats dt .num { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-stats dd { font-size: 12.5px; color: var(--text-3); margin-top: 4px; }

/* --- 机器人舞台 --- */
.hero-visual { display: grid; place-items: center; }
.hero-stage { position: relative; width: 100%; max-width: 470px; aspect-ratio: 1 / 1; display: grid; place-items: center; }

.corner { position: absolute; width: 26px; height: 26px; border: 2px solid rgba(79, 216, 245, 0.45); }
.corner.tl { top: 2%; left: 2%; border-right: 0; border-bottom: 0; border-top-left-radius: 8px; }
.corner.tr { top: 2%; right: 2%; border-left: 0; border-bottom: 0; border-top-right-radius: 8px; }
.corner.bl { bottom: 2%; left: 2%; border-right: 0; border-top: 0; border-bottom-left-radius: 8px; }
.corner.br { bottom: 2%; right: 2%; border-left: 0; border-top: 0; border-bottom-right-radius: 8px; }

.stage-ring {
  position: absolute; inset: 10%; border-radius: 50%;
  border: 1px dashed rgba(79, 216, 245, 0.16);
  animation: spin 40s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.robot { position: relative; width: 88%; filter: drop-shadow(0 26px 54px rgba(61, 123, 255, 0.22)); animation: float 7s ease-in-out infinite; }
@keyframes float { 0%, 100% { transform: translateY(-6px); } 50% { transform: translateY(6px); } }

.robot .arc { animation: arcPulse 1.6s ease-in-out infinite; transform-origin: 234px 190px; }
@keyframes arcPulse { 0%, 100% { opacity: 0.75; transform: scale(0.9); } 50% { opacity: 1; transform: scale(1.08); } }
.robot .arc-core { animation: corePulse 1.6s ease-in-out infinite; }
@keyframes corePulse { 0%, 100% { opacity: 0.85; } 50% { opacity: 1; } }
.robot .sparks { animation: sparksFlick 1.2s steps(2, end) infinite; }
@keyframes sparksFlick { 0%, 60% { opacity: 0.95; } 70% { opacity: 0.4; } 100% { opacity: 0.9; } }

/* --- Hero 全息 HUD 增强层 --- */
.holo-grid { animation: gridBreathe 6s ease-in-out infinite; }
@keyframes gridBreathe { 0%, 100% { opacity: 0.7; } 50% { opacity: 1; } }

.tech-ring-ticks { transform-box: view-box; transform-origin: 170px 176px; animation: spin 72s linear infinite; }
.tech-ring-dash { transform-box: view-box; transform-origin: 170px 176px; animation: spin 54s linear infinite reverse; }

.hud-reticle { transform-box: view-box; transform-origin: 234px 190px; animation: spin 18s linear infinite; }
.hud-reticle-outer { transform-box: view-box; transform-origin: 234px 190px; animation: spin 30s linear infinite reverse; }

.scan-fan { transform-box: view-box; transform-origin: 199px 154px; animation: fanSweep 3.8s ease-in-out infinite; }
@keyframes fanSweep {
  0%, 100% { transform: rotate(-5deg); opacity: 0.55; }
  50% { transform: rotate(5deg); opacity: 1; }
}

.scanline { animation: scanDown 5.6s cubic-bezier(0.45, 0, 0.55, 1) infinite; }
@keyframes scanDown {
  0% { transform: translateY(-24px); opacity: 0; }
  12% { opacity: 0.9; }
  88% { opacity: 0.9; }
  100% { transform: translateY(300px); opacity: 0; }
}

.hud-joint { animation: jointPulse 2.6s ease-in-out infinite; }
@keyframes jointPulse { 0%, 100% { opacity: 0.5; } 50% { opacity: 1; } }

.hud-panel { animation: hudBlink 3.4s ease-in-out infinite; }
@keyframes hudBlink { 0%, 100% { opacity: 0.75; } 50% { opacity: 1; } }

.robot .arm-flow { animation: armFlow 3s ease-in-out infinite; }
@keyframes armFlow { 0%, 100% { stroke-opacity: 0.18; } 50% { stroke-opacity: 0.55; } }

/* Hero 实拍图（六轴机器人 + MIG 焊枪 + 焊缝跟踪） */
.robot-photo {
  /* height: auto 必须保留：<img> 的 height 属性会作为表现性提示生效，
     若不覆盖则 width 与 height 同时确定，aspect-ratio 失效 → 图片被拉成竖长条 */
  width: 94%; height: auto; aspect-ratio: 1 / 1; object-fit: cover;
  border-radius: 20px; border: 1px solid rgba(79, 216, 245, 0.2);
  filter: none; animation: none;
  box-shadow: 0 30px 64px rgba(0, 0, 0, 0.6), 0 0 46px rgba(61, 123, 255, 0.16);
}

.float-card {
  position: absolute; display: flex; align-items: center; gap: 10px;
  padding: 11px 15px; border-radius: 14px;
  background: rgba(13, 19, 31, 0.8); border: 1px solid var(--line);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  animation: floatCard 5.5s ease-in-out infinite;
}
.float-card strong { display: block; font-size: 13px; font-weight: 600; }
.float-card small { display: block; font-size: 11.5px; color: var(--text-3); }
.fc-ico { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 9px; background: rgba(79, 216, 245, 0.11); color: var(--cyan); font-size: 14px; flex: none; }
.fc-1 { top: 12%; left: -2%; animation-delay: 0s; }
.fc-2 { bottom: 22%; right: -4%; animation-delay: 1.4s; }
.fc-3 { bottom: 4%; left: 3%; animation-delay: 2.6s; }
.fc-2 .fc-ico { background: rgba(255, 154, 61, 0.14); color: var(--hot); }
.fc-4 { top: 5%; right: -3%; animation-delay: 0.7s; }
.fc-4 .fc-ico { background: rgba(79, 216, 245, 0.14); }
.fc-4 strong { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 12px; letter-spacing: 0.07em; color: var(--cyan); }
@keyframes floatCard { 0%, 100% { transform: translateY(-5px); } 50% { transform: translateY(5px); } }

/* 行业标签条 */
.trust { margin-top: 62px; padding-top: 34px; border-top: 1px solid var(--line-soft); text-align: center; }
.trust-label { font-size: 12.5px; letter-spacing: 0.16em; color: var(--text-3); margin-bottom: 20px; }
.trust-logos { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 16px; }
.trust-logos span {
  font-size: 14px; font-weight: 500; color: var(--text-2);
  padding: 7px 18px; border-radius: 999px;
  background: rgba(255, 255, 255, 0.035); border: 1px solid var(--line-soft);
  transition: border-color 0.25s, color 0.25s;
}
.trust-logos span:hover { color: var(--text); border-color: rgba(79, 216, 245, 0.34); }

/* ---------------- 通用 section ---------------- */
.section { padding: 104px 0; }
.section-alt { background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.016) 18%, rgba(255, 255, 255, 0.016) 82%, transparent); }

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

/* 能力卡片 */
.card {
  position: relative; padding: 30px 26px 28px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line-soft);
  transition: transform 0.32s var(--ease), border-color 0.32s, background 0.32s;
  overflow: hidden;
}
.card::after { content: ""; position: absolute; inset: 0; border-radius: inherit; background: radial-gradient(circle at 12% 0%, rgba(61, 123, 255, 0.15), transparent 58%); opacity: 0; transition: opacity 0.35s; }
.card:hover { transform: translateY(-5px); border-color: rgba(79, 216, 245, 0.3); background: var(--surface-2); }
.card:hover::after { opacity: 1; }
.card-ico { width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; margin-bottom: 20px; background: linear-gradient(140deg, rgba(61, 123, 255, 0.2), rgba(79, 216, 245, 0.09)); border: 1px solid rgba(79, 216, 245, 0.22); color: var(--cyan); position: relative; }
.card h3 { font-size: 18.5px; margin-bottom: 11px; position: relative; }
.card p { font-size: 14.6px; color: var(--text-2); position: relative; }

/* ---------------- 业务范围 ---------------- */
.biz-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

.biz-card {
  padding: 34px 30px; border-radius: var(--radius-lg);
  background: var(--surface); border: 1px solid var(--line-soft);
  transition: transform 0.34s var(--ease), border-color 0.34s;
  position: relative; overflow: hidden;
}
.biz-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: var(--grad); opacity: 0.6; }
.biz-card:nth-child(2)::before { background: var(--grad-hot); }
.biz-card:hover { transform: translateY(-6px); border-color: rgba(79, 216, 245, 0.3); }

.biz-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; }
.biz-ico { width: 50px; height: 50px; border-radius: 15px; display: grid; place-items: center; background: linear-gradient(140deg, rgba(61, 123, 255, 0.22), rgba(79, 216, 245, 0.08)); border: 1px solid rgba(79, 216, 245, 0.25); color: var(--cyan); }
.biz-ico-hot { background: linear-gradient(140deg, rgba(255, 154, 61, 0.22), rgba(255, 196, 107, 0.07)); border-color: rgba(255, 154, 61, 0.28); color: var(--hot); }

.biz-tag { font-size: 12px; font-weight: 600; letter-spacing: 0.1em; padding: 5px 14px; border-radius: 999px; background: rgba(61, 123, 255, 0.13); color: #9EC1FF; border: 1px solid rgba(61, 123, 255, 0.28); }
.biz-tag-hot { background: rgba(255, 154, 61, 0.13); color: #FFC08A; border-color: rgba(255, 154, 61, 0.3); }

.biz-card h3 { font-size: 23px; margin-bottom: 12px; }
.biz-sub { font-size: 15px; color: var(--text-2); margin-bottom: 28px; }

.biz-group { padding-top: 22px; border-top: 1px solid var(--line-soft); }
.biz-group + .biz-group { margin-top: 22px; }
.biz-group h4 { font-size: 14.5px; color: var(--text); margin-bottom: 14px; display: flex; align-items: center; gap: 9px; }
.biz-group h4::before { content: ""; width: 3px; height: 14px; border-radius: 2px; background: var(--grad); }
.biz-card:nth-child(2) .biz-group h4::before { background: var(--grad-hot); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.chips li { font-size: 12.8px; color: var(--text-2); padding: 5px 12px; border-radius: 8px; background: rgba(255, 255, 255, 0.045); border: 1px solid var(--line-soft); }
.biz-note { font-size: 13.8px; color: var(--text-3); line-height: 1.75; }

.biz-note-bar {
  margin-top: 24px; display: flex; flex-wrap: wrap; align-items: center; gap: 10px 12px;
  padding: 20px 26px; border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03); border: 1px solid var(--line-soft);
  font-size: 13.5px; color: var(--text-2);
}
.biz-note-bar strong { color: var(--text); font-size: 13.5px; margin-right: 6px; }
.biz-note-bar i { color: var(--text-3); font-style: normal; }

/* ---------------- Tabs / 技术面板 ---------------- */
.tabs { display: flex; flex-wrap: wrap; justify-content: center; gap: 9px; margin-bottom: 40px; }
.tab {
  padding: 11px 24px; border-radius: 999px; cursor: pointer;
  background: rgba(255, 255, 255, 0.04); border: 1px solid var(--line);
  font-size: 14.5px; font-weight: 500; color: var(--text-2);
  transition: all 0.26s var(--ease);
}
.tab:hover { color: var(--text); border-color: rgba(79, 216, 245, 0.32); }
.tab.is-active { background: var(--grad); color: #04101F; font-weight: 600; border-color: transparent; box-shadow: 0 12px 30px -14px rgba(61, 123, 255, 0.9); }

.tab-panels { position: relative; }
.panel { display: none; grid-template-columns: 0.82fr 1.18fr; gap: 52px; align-items: center; padding: 40px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--line-soft); }
.panel.is-active { display: grid; animation: fadeUp 0.5s var(--ease); }
@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

.mini-stage { display: grid; place-items: center; padding: 18px; border-radius: var(--radius); background: radial-gradient(circle at 50% 40%, rgba(61, 123, 255, 0.12), transparent 68%); }
.mini-stage svg { width: 100%; max-width: 230px; }

.tag { display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: 0.08em; padding: 5px 13px; border-radius: 999px; background: rgba(61, 123, 255, 0.14); color: #9EC1FF; border: 1px solid rgba(61, 123, 255, 0.28); margin-bottom: 16px; }
.tag-cyan { background: rgba(79, 216, 245, 0.13); color: #A6EDF8; border-color: rgba(79, 216, 245, 0.3); }
.tag-hot { background: rgba(255, 154, 61, 0.14); color: #FFC08A; border-color: rgba(255, 154, 61, 0.3); }

.panel-body h3 { font-size: 29px; margin-bottom: 12px; }
.panel-sub { color: var(--text-2); font-size: 15.5px; margin-bottom: 24px; }

.check-list { display: grid; gap: 12px; margin-bottom: 28px; }
.check-list li { position: relative; padding-left: 27px; font-size: 14.6px; color: var(--text-2); line-height: 1.7; }
.check-list li b { color: var(--text); }
.check-list li::before {
  content: ""; position: absolute; left: 0; top: 7px; width: 16px; height: 16px; border-radius: 50%;
  background: rgba(79, 216, 245, 0.13) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.3l2.6 2.6L12 5.5' fill='none' stroke='%234FD8F5' stroke-width='1.9' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 12px no-repeat;
}

.panel-specs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; padding-top: 22px; border-top: 1px solid var(--line-soft); }
.panel-specs small { display: block; font-size: 11.5px; color: var(--text-3); margin-bottom: 5px; }
.panel-specs strong { font-size: 14.5px; font-weight: 600; }

/* ---------------- 交付流程 ---------------- */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.flow li { position: relative; padding: 30px 24px 26px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line-soft); transition: transform 0.3s var(--ease), border-color 0.3s; }
.flow li:hover { transform: translateY(-5px); border-color: rgba(255, 154, 61, 0.32); }
.flow li:not(:last-child)::after { content: ""; position: absolute; top: 50%; right: -14px; width: 8px; height: 8px; border-top: 1.6px solid rgba(79, 216, 245, 0.55); border-right: 1.6px solid rgba(79, 216, 245, 0.55); transform: translateY(-50%) rotate(45deg); }
.flow li:nth-child(4)::after { display: none; }
.flow-idx { display: block; font-size: 13px; font-weight: 700; letter-spacing: 0.14em; color: var(--cyan); margin-bottom: 14px; }
.flow li:nth-child(4) .flow-idx { color: var(--hot); }
.flow h3 { font-size: 17.5px; margin-bottom: 10px; }
.flow p { font-size: 14.2px; color: var(--text-2); margin-bottom: 16px; }
.flow-tag { display: inline-block; font-size: 11.5px; color: var(--text-3); border: 1px solid var(--line); border-radius: 999px; padding: 3px 11px; }

/* ---------------- 规格表 ---------------- */
.spec-wrap { border-radius: var(--radius); border: 1px solid var(--line-soft); background: var(--surface); overflow: hidden; }
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table tr + tr { border-top: 1px solid var(--line-soft); }
.spec-table th { width: 150px; text-align: left; padding: 17px 24px; font-size: 14px; font-weight: 600; color: var(--text); background: rgba(255, 255, 255, 0.022); vertical-align: top; }
.spec-table td { padding: 17px 24px; font-size: 14.3px; color: var(--text-2); }
.spec-table tr:hover td, .spec-table tr:hover th { background: rgba(61, 123, 255, 0.05); }

/* ---------------- 价值对比 ---------------- */
.compare { border-radius: var(--radius); border: 1px solid var(--line-soft); background: var(--surface); overflow: hidden; }
.compare-head, .compare-row { display: grid; grid-template-columns: 0.8fr 1.1fr 1.1fr; }
.compare-row + .compare-row, .compare-head + .compare-row { border-top: 1px solid var(--line-soft); }
.compare-cell { padding: 17px 22px; font-size: 14.2px; display: flex; align-items: center; }
.compare-head .compare-cell { font-size: 13.5px; font-weight: 700; letter-spacing: 0.02em; padding: 16px 22px; background: rgba(255, 255, 255, 0.025); }
.compare-cell.label { color: var(--text); font-weight: 600; }
.compare-cell.old { color: var(--text-3); }
.compare-cell.new { color: #D7E6FF; background: rgba(61, 123, 255, 0.07); position: relative; }
.compare-cell.new::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: var(--grad); }
.compare-head .compare-cell.old { color: var(--text-3); }
.compare-head .compare-cell.new { color: var(--cyan); background: rgba(79, 216, 245, 0.08); }
.compare-row:hover { background: rgba(255, 255, 255, 0.018); }
.compare-foot { margin-top: 16px; font-size: 12.8px; color: var(--text-3); text-align: center; }

/* ---------------- 关于我们 ---------------- */
.about-inner { display: grid; grid-template-columns: 1.25fr 0.75fr; gap: 56px; align-items: start; }
.about-copy h2 { font-size: clamp(24px, 3.2vw, 34px); margin-bottom: 20px; }
.about-copy p { color: var(--text-2); font-size: 15.5px; margin-bottom: 16px; }
.about-copy p b { color: var(--text); }
.about-tags { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 24px; }
.about-tags span { font-size: 13px; color: var(--text-2); padding: 7px 15px; border-radius: 999px; background: rgba(255, 255, 255, 0.04); border: 1px solid var(--line-soft); }

.about-side { display: grid; gap: 14px; }
.about-fact { position: relative; padding: 20px 22px 20px 26px; border-radius: var(--radius-sm); background: var(--surface); border: 1px solid var(--line-soft); overflow: hidden; }
.about-fact::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--grad); }
.about-fact:nth-child(2)::before { background: var(--grad-hot); }
.about-fact small { display: block; font-size: 12px; color: var(--text-3); margin-bottom: 6px; }
.about-fact strong { display: block; font-size: 14.6px; font-weight: 600; }

/* ---------------- FAQ ---------------- */
.faq { display: grid; gap: 12px; }
.faq details { border-radius: var(--radius-sm); background: var(--surface); border: 1px solid var(--line-soft); transition: border-color 0.3s, background 0.3s; }
.faq details[open] { border-color: rgba(79, 216, 245, 0.28); background: var(--surface-2); }
.faq summary { list-style: none; cursor: pointer; padding: 19px 54px 19px 22px; font-size: 15.5px; font-weight: 600; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; position: absolute; right: 22px; top: 50%; width: 9px; height: 9px; border-right: 1.8px solid var(--cyan); border-bottom: 1.8px solid var(--cyan); transform: translateY(-70%) rotate(45deg); transition: transform 0.3s var(--ease); }
.faq details[open] summary::after { transform: translateY(-30%) rotate(-135deg); }
.faq-body { padding: 0 22px 20px; font-size: 14.5px; color: var(--text-2); }

/* ---------------- CTA ---------------- */
.cta-band { padding: 40px 0 110px; }
.cta-card {
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 54px; align-items: center;
  padding: 52px; border-radius: var(--radius-lg);
  background: linear-gradient(150deg, rgba(61, 123, 255, 0.13), rgba(79, 216, 245, 0.07) 52%, rgba(255, 154, 61, 0.08));
  border: 1px solid rgba(79, 216, 245, 0.22);
  box-shadow: var(--shadow);
}
.cta-copy h2 { font-size: clamp(25px, 3.2vw, 35px); margin-bottom: 16px; }
.cta-copy > p { color: var(--text-2); font-size: 15.6px; margin-bottom: 24px; }
.cta-points { display: grid; gap: 11px; margin-bottom: 30px; }
.cta-points li { position: relative; padding-left: 26px; font-size: 14.5px; color: var(--text-2); }
.cta-points li::before { content: ""; position: absolute; left: 0; top: 7px; width: 16px; height: 16px; border-radius: 50%; background: rgba(79, 216, 245, 0.13) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.3l2.6 2.6L12 5.5' fill='none' stroke='%234FD8F5' stroke-width='1.9' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 12px no-repeat; }

.cta-contact { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; padding-top: 24px; border-top: 1px solid var(--line-soft); }
.cta-contact small { display: block; font-size: 11.5px; color: var(--text-3); margin-bottom: 5px; }
.cta-contact strong { display: block; font-size: 14px; font-weight: 600; word-break: break-all; }
.cta-contact a { color: inherit; text-decoration: none; border-bottom: 1px solid transparent; transition: color 0.2s, border-color 0.2s; }
.cta-contact a:hover { color: var(--cyan); border-bottom-color: currentColor; }

.cta-form { display: grid; gap: 14px; padding: 28px; border-radius: var(--radius); background: rgba(9, 13, 22, 0.62); border: 1px solid var(--line); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); }
.field { display: grid; gap: 7px; }
.field label { font-size: 13px; color: var(--text-2); }
.field label i { color: var(--hot); font-style: normal; }
.field input, .field select, .field textarea {
  width: 100%; padding: 12px 15px; border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.045); border: 1px solid var(--line);
  font-size: 14.5px; outline: none; transition: border-color 0.24s, background 0.24s;
  font-family: inherit;
}
.field textarea { resize: vertical; min-height: 76px; }
.field input::placeholder, .field textarea::placeholder { color: var(--text-3); }
.field input:focus, .field select:focus, .field textarea:focus { border-color: rgba(79, 216, 245, 0.55); background: rgba(255, 255, 255, 0.07); }
.field select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 6.5l4 4 4-4' fill='none' stroke='%23A9B4C9' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; background-size: 15px; padding-right: 40px; }
.field select option { background: #0D131F; color: var(--text); }
.form-note { font-size: 12px; color: var(--text-3); text-align: center; }
.form-note.is-ok { color: var(--cyan); }
.form-note.is-err { color: #FF9BA8; }

/* ---------------- 页脚 ---------------- */
.footer { border-top: 1px solid var(--line-soft); padding: 60px 0 30px; background: rgba(6, 9, 16, 0.6); }
.footer-inner { display: grid; grid-template-columns: 1.3fr 1.7fr; gap: 54px; padding-bottom: 42px; }
.footer-brand p { margin-top: 18px; font-size: 14.2px; color: var(--text-3); max-width: 340px; }
.footer-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer-cols h4 { font-size: 13.5px; margin-bottom: 15px; color: var(--text); }
.footer-cols a { display: block; font-size: 14px; color: var(--text-3); padding: 5px 0; transition: color 0.22s; }
.footer-cols a:hover { color: var(--cyan); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; padding-top: 24px; border-top: 1px solid var(--line-soft); font-size: 12.8px; color: var(--text-3); }

/* ---------------- 回到顶部 ---------------- */
.to-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 50;
  width: 44px; height: 44px; border-radius: 50%; cursor: pointer;
  display: grid; place-items: center;
  background: rgba(13, 19, 31, 0.85); border: 1px solid var(--line); color: var(--text-2);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: all 0.3s var(--ease);
}
.to-top.is-show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { color: var(--cyan); border-color: rgba(79, 216, 245, 0.45); }

/* ---------------- 进场动画 ---------------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1080px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero .lede { max-width: none; }
  .panel { grid-template-columns: 1fr; gap: 32px; padding: 30px; }
  .biz-grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .flow li:nth-child(4)::after { display: block; }
  .flow li:nth-child(even)::after { display: none; }
  .cta-card { grid-template-columns: 1fr; gap: 34px; padding: 38px; }
  .about-inner { grid-template-columns: 1fr; gap: 36px; }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 760px) {
  .container { padding: 0 18px; }
  .section { padding: 74px 0; }
  .nav-toggle { display: flex; }
  .brand-img { height: 31px; }
  .brand-img-sm { height: 28px; }
  .nav-links {
    position: absolute; top: 100%; left: 12px; right: 12px;
    flex-direction: column; align-items: stretch; gap: 4px;
    padding: 14px; border-radius: var(--radius);
    background: rgba(10, 15, 27, 0.96); border: 1px solid var(--line);
    backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
    box-shadow: var(--shadow);
    opacity: 0; visibility: hidden; transform: translateY(-10px);
    transition: all 0.3s var(--ease);
  }
  .nav-links.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav-links a { padding: 12px 14px; }
  .nav-links .nav-cta { margin: 6px 0 0; text-align: center; }

  .hero { padding: 44px 0 30px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 20px 14px; }
  .hero-stats dt { font-size: 23px; }
  .hero-stage { max-width: 340px; }
  .fc-1 { left: -1%; } .fc-2 { right: -1%; }
  .fc-4 { right: -1%; top: 4%; }
  .fc-4 strong { font-size: 11px; }
  .float-card { padding: 9px 12px; }
  .float-card strong { font-size: 12px; }
  .float-card small { font-size: 10.8px; }
  .fc-ico { width: 26px; height: 26px; font-size: 12px; }

  .grid-3 { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .flow li::after { display: none !important; }
  .tabs { gap: 7px; }
  .tab { padding: 9px 16px; font-size: 13.4px; }
  .biz-card { padding: 26px 22px; }
  .biz-card h3 { font-size: 20px; }
  .panel-body h3 { font-size: 24px; }
  .panel-specs { grid-template-columns: 1fr; gap: 12px; }
  .panel-specs > div { display: flex; justify-content: space-between; align-items: baseline; gap: 14px; }
  .panel-specs small { margin: 0; }
  .panel-specs strong { text-align: right; }

  .spec-table th { width: 102px; padding: 14px 16px; font-size: 13px; }
  .spec-table td { padding: 14px 16px; font-size: 13.5px; }

  .compare-head, .compare-row { grid-template-columns: 1fr; }
  .compare-head { display: none; }
  .compare-row { padding: 6px 0; }
  .compare-head + .compare-row { border-top: 0; }
  .compare-cell { padding: 7px 18px; }
  .compare-cell.label { padding-top: 14px; font-size: 13.5px; color: var(--cyan); }
  .compare-cell.old::before { content: "传统："; color: var(--text-3); }
  .compare-cell.new::before { position: static; width: auto; background: none; content: "浩通智能："; color: var(--cyan); font-weight: 600; }

  .cta-card { padding: 28px 22px; border-radius: var(--radius); }
  .cta-contact { grid-template-columns: 1fr; gap: 14px; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .trust-logos span { font-size: 12.8px; padding: 6px 14px; }
  .to-top { right: 16px; bottom: 16px; }
}

/* 超窄屏（≤400px，如 iPhone SE）：单行文案再缩一档，保证 11 字不断行也不溢出 */
@media (max-width: 400px) {
  .hero h1 .h1-line2 { font-size: 0.8em; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------------- 独立联系表单页（form.html） ---------------- */
.form-standalone { padding: 64px 0 96px; }
.form-standalone .cta-card {
  grid-template-columns: 1fr;
  max-width: 720px;
  margin: 0 auto;
  gap: 34px;
  padding: 46px 48px;
}
.form-standalone .cta-copy > p { margin-bottom: 26px; }
.nav-back {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; color: var(--text-2);
  padding: 9px 17px; border-radius: 999px;
  border: 1px solid var(--line); background: rgba(255, 255, 255, 0.04);
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.nav-back:hover { color: var(--cyan); border-color: rgba(79, 216, 245, 0.45); background: rgba(79, 216, 245, 0.07); }

@media (max-width: 1080px) {
  .form-standalone .cta-card { padding: 38px 34px; }
}
@media (max-width: 760px) {
  .form-standalone { padding: 34px 0 66px; }
  .form-standalone .cta-card { padding: 28px 20px; }
  .nav-back { padding: 8px 13px; font-size: 13px; }
}