/* ============================================
   AIC 首页专属样式
   ============================================ */

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background-color: var(--ink);
  color: #fff;
  overflow: hidden;
  min-height: 640px;
}

.hero-photo {
  isolation: isolate;
  display: flex;
  flex-direction: column;
  min-height: clamp(680px, calc(100svh - 112px), 820px);
  background:
    radial-gradient(ellipse at 82% 50%, rgba(74, 144, 255, 0.18), transparent 48%),
    var(--cfg-bg, url("/images/hero-device.webp")) 78% 72% / cover no-repeat,
    #050b16;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 75% 50%, rgba(0, 82, 217, 0.4), transparent 55%),
    radial-gradient(ellipse at 10% 100%, rgba(0, 82, 217, 0.15), transparent 50%),
    linear-gradient(135deg, #0A1628 0%, #1B2A41 100%);
}

.hero-photo .hero-bg {
  z-index: 1;
  background:
    linear-gradient(90deg, rgba(5, 11, 22, 0.90) 0%, rgba(5, 11, 22, 0.74) 20%, rgba(5, 11, 22, 0.36) 40%, rgba(5, 11, 22, 0.08) 58%, rgba(5, 11, 22, 0) 74%),
    linear-gradient(180deg, rgba(5, 11, 22, 0.03) 0%, rgba(5, 11, 22, 0) 50%, rgba(5, 11, 22, 0.08) 80%, rgba(5, 11, 22, 0.42) 100%);
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  z-index: 2;
  opacity: 0.05;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.5) 1px, transparent 1px);
  background-size: 80px 80px;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 3;
  max-width: var(--container);
  margin: 0 auto;
  padding: 90px 32px 100px;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 60px;
  align-items: center;
  min-height: 580px;
}

.hero-content { max-width: 600px; }

.hero-photo .hero-inner {
  width: 100%;
  flex: 1;
  display: flex;
  min-height: 0;
  padding: clamp(76px, 8vw, 112px) 32px clamp(86px, 9vw, 128px);
}

.hero-photo .hero-content { max-width: 600px; min-width: 0; }

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 8px 16px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--r);
  font-size: 12px;
  letter-spacing: 0.15em;
  color: #B8C5DD;
  margin-bottom: 32px;
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(8px);
  opacity: 0;
  animation: fadeUp 0.6s ease forwards;
}

.hero-eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.hero-eyebrow .sep {
  color: rgba(255, 255, 255, 0.2);
}

.hero-eyebrow .model {
  color: #fff;
  font-family: "JetBrains Mono", monospace;
  font-weight: 600;
}

.hero h1 {
  font-family: "Barlow Condensed", "Noto Sans SC", sans-serif;
  font-size: 68px;
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.1s forwards;
}

.hero h1 .blue { color: var(--accent-bright); }

.hero p.lead {
  font-size: 17px;
  color: #B8C5DD;
  max-width: 520px;
  margin-bottom: 40px;
  line-height: 1.7;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.2s forwards;
}

/* 实景图 hero：背景提亮后，给标题/副标题加文字阴影，确保白字仍清晰可读 */
.hero-photo h1 {
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.5), 0 1px 4px rgba(0, 0, 0, 0.55);
}
.hero-photo p.lead {
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.6), 0 1px 3px rgba(0, 0, 0, 0.5);
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-bottom: 48px;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.7s ease 0.3s forwards;
}

.hero-actions .btn-primary {
  background: #fff;
  color: var(--ink);
}

.hero-actions .btn-primary:hover {
  background: #F0F2F5;
}

.hero-actions .btn-ghost {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.25);
}

.hero-actions .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: #fff;
  color: #fff;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Performance Stats Bar */
.perf-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  opacity: 0;
  animation: fadeUp 0.7s ease 0.4s forwards;
}

.perf-item .perf-val {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 38px;
  font-weight: 700;
  color: #fff;
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.perf-item .perf-val small {
  font-size: 15px;
  color: var(--accent-bright);
  font-weight: 600;
}

.perf-item .perf-lbl {
  font-size: 12px;
  color: #8595B0;
  margin-top: 8px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Hero Visual */
.hero-visual {
  position: relative;
  height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  animation: fadeUp 0.8s ease 0.3s forwards;
}

.gauge-stack {
  position: relative;
  width: 100%;
  height: 100%;
}

.spec-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--r);
  padding: 14px 18px;
  backdrop-filter: blur(12px);
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: #A8B5C7;
  letter-spacing: 0.05em;
}

.spec-card .val {
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  margin-top: 4px;
}

.spec-card .dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #00FF88;
  margin-right: 6px;
  animation: pulse 2s infinite;
}

.spec-card.s1 { top: 30px; left: 0; }
.spec-card.s2 { top: 30px; right: 0; text-align: right; }
.spec-card.s3 { bottom: 30px; left: 0; }
.spec-card.s4 { bottom: 30px; right: 0; text-align: right; }

.hero-machine {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  max-width: 380px;
}

/* ---------- Toolbar (核心分流) ---------- */
.toolbar {
  position: relative;
  z-index: 5;
  margin-top: -50px;
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding: 0 32px;
}

.toolbar-grid {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
}

.tool {
  padding: 28px 28px;
  border-right: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 18px;
  cursor: pointer;
  transition: all var(--t-base);
  position: relative;
  text-decoration: none;
  color: inherit;
}

.tool:last-child { border-right: none; }

.tool:hover {
  background: var(--bg);
}

.tool:hover .tool-arrow {
  transform: translateX(6px);
  color: var(--accent);
}

.tool:hover .tool-icon {
  transform: scale(1.05);
  background: var(--accent);
  color: #fff;
}

.tool-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-light);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
  transition: all var(--t-base);
}

.tool-text { flex: 1; min-width: 0; }

.tool-text strong {
  display: block;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

.tool-text span {
  font-size: 12.5px;
  color: var(--mute);
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tool-arrow {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 20px;
  color: var(--mute);
  transition: all var(--t-base);
}

/* 资料下载入口高亮 */
.tool.featured {
  background: linear-gradient(135deg, rgba(0, 82, 217, 0.02), rgba(0, 82, 217, 0.06));
}

.tool.featured .tool-icon {
  background: var(--accent);
  color: #fff;
}

.tool.featured:hover {
  background: linear-gradient(135deg, rgba(0, 82, 217, 0.05), rgba(0, 82, 217, 0.12));
}

/* ---------- Pain Points ---------- */
.pain {
  background: var(--bg);
  padding: 130px 0 100px;
}

.pain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.pain-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 32px 28px;
  transition: all var(--t-base);
}

.pain-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-accent);
}

.pain-card .pain-idx {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.15em;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.pain-card .pain-idx::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.pain-card h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.3;
}

.pain-card .pain-benefit {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  line-height: 1.4;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 7px;
}

.pain-card .pain-benefit::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}

.pain-card p {
  font-size: 13.5px;
  color: var(--mute);
  line-height: 1.7;
}

/* ---------- Scenarios ---------- */
.scenarios {
  padding: 100px 0;
  background: var(--ink);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.scenarios::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.5) 1px, transparent 1px);
  background-size: 80px 80px;
}

.scenarios .container { position: relative; }
.scenarios .section-head h2 { color: #fff; }
.scenarios .section-head .desc { color: #A8B5C7; }
.scenarios .eyebrow { color: var(--accent-bright); }

.scen-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.scen-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--r-lg);
  padding: 32px 28px;
  cursor: pointer;
  transition: all var(--t-base);
  position: relative;
  overflow: hidden;
}

.scen-card:hover {
  background: rgba(0, 82, 217, 0.12);
  border-color: rgba(0, 82, 217, 0.4);
  transform: translateY(-4px);
}

.scen-card:hover .scen-icon {
  transform: scale(1.1);
}

.scen-card .scen-num {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--accent-bright);
  letter-spacing: 0.2em;
  margin-bottom: 18px;
}

.scen-card .scen-icon {
  width: 44px;
  height: 44px;
  color: var(--accent-bright);
  margin-bottom: 20px;
  transition: transform var(--t-base);
}

.scen-card h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.scen-card .client-name {
  font-size: 13px;
  color: #7A8AA8;
  margin-bottom: 20px;
  font-family: "JetBrains Mono", monospace;
}

.scen-card .scen-desc {
  font-size: 13px;
  color: #A8B5C7;
  line-height: 1.7;
  margin-bottom: 20px;
}

.scen-card .scen-more {
  font-size: 12.5px;
  color: var(--accent-bright);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  letter-spacing: 0.05em;
}

.scen-card .scen-more::after {
  content: "→";
  transition: transform var(--t-base);
}

.scen-card:hover .scen-more::after {
  transform: translateX(4px);
}

/* ---------- Core Technology ---------- */
.tech {
  padding: 100px 0;
}

.tech-split {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: center;
}

.tech-content h2 {
  font-family: "Barlow Condensed", "Noto Sans SC", sans-serif;
  font-size: 46px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 20px;
}

.tech-content .lead {
  font-size: 16px;
  color: var(--mute);
  margin-bottom: 40px;
  line-height: 1.75;
}

.tech-list {
  list-style: none;
}

.tech-list li {
  padding: 22px 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 20px;
  align-items: start;
}

.tech-list li:last-child { border-bottom: 1px solid var(--line); }

.tech-list .idx {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 26px;
  font-weight: 700;
  color: var(--accent);
}

.tech-list strong {
  display: block;
  font-size: 16.5px;
  font-weight: 600;
  margin-bottom: 5px;
}

.tech-list span {
  font-size: 13.5px;
  color: var(--mute);
  line-height: 1.7;
}

.tech-visual {
  background: var(--ink);
  padding: 60px 40px;
  border-radius: var(--r-lg);
  position: relative;
  overflow: hidden;
  min-height: 520px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.tech-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 70% 30%, rgba(0, 82, 217, 0.3), transparent 50%);
}

.dial {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.dial-svg {
  width: 240px;
  height: 240px;
  cursor: pointer;
}

.dial-svg .dial-needle {
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: 110px 110px;
}

.dial-modes {
  display: flex;
  justify-content: space-between;
  margin-top: 30px;
  color: #fff;
  width: 100%;
  gap: 20px;
}

.dial-mode {
  text-align: center;
  flex: 1;
  padding: 14px;
  border-radius: var(--r);
  cursor: pointer;
  transition: all var(--t-base);
}

.dial-mode:hover {
  background: rgba(255, 255, 255, 0.05);
}

.dial-mode.active.wet {
  background: rgba(255, 184, 74, 0.1);
  border: 1px solid rgba(255, 184, 74, 0.3);
}

.dial-mode.active.dry {
  background: rgba(74, 144, 255, 0.1);
  border: 1px solid rgba(74, 144, 255, 0.3);
}

.dial-mode .label {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}

.dial-mode.wet .label { color: #FFB84A; }
.dial-mode.dry .label { color: var(--accent-bright); }

.dial-mode .desc {
  font-size: 12px;
  color: #A8B5C7;
  line-height: 1.5;
}

/* ---------- Resource Wall (资料墙 - 核心) ---------- */
.resources {
  padding: 100px 0;
  background: var(--bg);
}

.resource-master {
  background: linear-gradient(135deg, var(--ink) 0%, var(--accent-deep) 100%);
  color: #fff;
  border-radius: var(--r-lg);
  padding: 44px;
  margin-bottom: 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.resource-master::before {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(74, 144, 255, 0.35), transparent 70%);
  border-radius: 50%;
}

.rm-left { position: relative; z-index: 2; }

.rm-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.1);
  padding: 6px 14px;
  border-radius: var(--r-sm);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.15em;
  margin-bottom: 18px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.rm-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  background: #00FF88;
  border-radius: 50%;
}

.resource-master h3 {
  font-family: "Barlow Condensed", "Noto Sans SC", sans-serif;
  font-size: 36px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 14px;
}

.resource-master p {
  font-size: 14.5px;
  color: #B8C5DD;
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 480px;
}

.rm-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.rm-chips span {
  font-size: 12px;
  background: rgba(255, 255, 255, 0.08);
  padding: 6px 12px;
  border-radius: var(--r-sm);
  color: #fff;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.rm-chips span::before {
  content: "✓";
  color: #00FF88;
  font-size: 11px;
}

.rm-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.rm-actions .btn-primary {
  background: #fff;
  color: var(--ink);
}

.rm-actions .btn-primary:hover {
  background: #F0F2F5;
}

.rm-actions .btn-ghost {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.3);
}

.rm-actions .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
}

/* Right: ZIP visual */
.rm-visual {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 280px;
}

.zip-pack-hero {
  width: 200px;
  height: 240px;
  border-radius: var(--r);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(255, 255, 255, 0.15);
  position: relative;
  overflow: hidden;
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.zip-pack-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 70px;
  height: 8px;
  background: var(--accent-bright);
  border-radius: 0 0 4px 4px;
}

.zip-pack-hero .zip-grid {
  position: absolute;
  inset: 0;
  opacity: 0.08;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.5) 1px, transparent 1px);
  background-size: 24px 24px;
}

.zip-pack-hero .zip-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -65%);
  font-family: "Barlow Condensed", sans-serif;
  font-size: 64px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.05em;
}

.zip-pack-hero .zip-label {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  font-family: "JetBrains Mono", monospace;
  font-size: 10.5px;
  color: var(--accent-bright);
  letter-spacing: 0.15em;
  white-space: nowrap;
}

.zip-pack-hero .zip-size {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  color: #A8B5C7;
}

/* Resource cards grid */
.resource-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}

.resource-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 24px 20px;
  cursor: pointer;
  transition: all var(--t-base);
  display: flex;
  flex-direction: column;
}

.resource-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.resource-card:hover .res-icon {
  transform: scale(1.1) rotate(-3deg);
}

.res-icon {
  width: 44px;
  height: 52px;
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Barlow Condensed", sans-serif;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 18px;
  transition: transform var(--t-base);
}

.res-icon.pdf { background: #FEE4E2; color: var(--danger); }
.res-icon.doc { background: #FEE4E2; color: var(--danger); }
.res-icon.vid { background: #FEF0C7; color: #B54708; }
.res-icon.img { background: #E0F2FE; color: #0086C9; }
.res-icon.xls { background: #D1FADF; color: #039855; }

.resource-card h5 {
  font-size: 14.5px;
  font-weight: 600;
  margin-bottom: 6px;
  line-height: 1.4;
}

.resource-card .res-desc {
  font-size: 12.5px;
  color: var(--mute);
  margin-bottom: 18px;
  flex: 1;
  line-height: 1.6;
}

.resource-card .res-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 11.5px;
  font-family: "JetBrains Mono", monospace;
  color: var(--mute);
}

.resource-card .res-down {
  color: var(--accent);
  font-weight: 600;
}

/* ---------- Process Timeline ---------- */
.process {
  padding: 100px 0;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0;
  position: relative;
  margin-top: 24px;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 30px;
  left: 5%;
  right: 5%;
  height: 2px;
  background: var(--line);
}

.timeline-node {
  position: relative;
  text-align: center;
  cursor: pointer;
}

.timeline-dot {
  width: 60px;
  height: 60px;
  background: #fff;
  border: 2px solid var(--accent);
  border-radius: 50%;
  margin: 0 auto 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Barlow Condensed", sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--accent);
  position: relative;
  z-index: 2;
  transition: all var(--t-base);
}

.timeline-node:hover .timeline-dot {
  background: var(--accent);
  color: #fff;
  transform: scale(1.1);
  box-shadow: var(--shadow-accent);
}

.timeline-node h5 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
}

.timeline-node p {
  font-size: 12px;
  color: var(--mute);
  line-height: 1.5;
  padding: 0 10px;
}

.timeline-phase {
  position: absolute;
  top: -30px;
  font-size: 11px;
  letter-spacing: 0.15em;
  font-weight: 700;
  color: var(--accent);
  font-family: "JetBrains Mono", monospace;
  left: 0;
}

/* ---------- Trust Bar ---------- */
.trust {
  padding: 60px 0 100px;
}

.trust-bar {
  background: var(--ink);
  color: #fff;
  padding: 38px 44px;
  border-radius: var(--r-lg);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.trust-icon {
  width: 46px;
  height: 46px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-bright);
  flex-shrink: 0;
}

.trust-text strong {
  display: block;
  font-size: 14.5px;
  font-weight: 600;
  margin-bottom: 2px;
}

.trust-text span {
  font-size: 12px;
  color: #A8B5C7;
}

/* ---------- Final CTA ---------- */
.final-cta {
  background: linear-gradient(135deg, var(--ink) 0%, var(--accent-deep) 100%);
  color: #fff;
  text-align: center;
  padding: 90px 32px;
  position: relative;
  overflow: hidden;
}

.final-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.08;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.5) 1px, transparent 1px);
  background-size: 60px 60px;
}

.final-cta-inner {
  position: relative;
  z-index: 2;
  max-width: 760px;
  margin: 0 auto;
}

.final-cta .eyebrow { color: var(--accent-bright); }

.final-cta h2 {
  font-family: "Barlow Condensed", "Noto Sans SC", sans-serif;
  font-size: 52px;
  font-weight: 700;
  line-height: 1.1;
  margin: 14px 0 20px;
}

.final-cta p {
  font-size: 16px;
  color: #B8C5DD;
  margin-bottom: 40px;
}

.final-cta .cta-row {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.final-cta .btn-primary {
  background: #fff;
  color: var(--ink);
  padding: 16px 32px;
  font-size: 15px;
}

.final-cta .btn-primary:hover { background: #F0F2F5; }

.final-cta .btn-ghost {
  border-color: rgba(255, 255, 255, 0.3);
  color: #fff;
  padding: 16px 32px;
  font-size: 15px;
}

.final-cta .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
  color: #fff;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; padding: 60px 32px 80px; }
  .hero h1 { font-size: 52px; }
  .hero-visual { height: 380px; }
  .hero-photo {
    min-height: 720px;
    background-position: 70% center;
  }
  .hero-photo .hero-bg {
    background:
      linear-gradient(90deg, rgba(5, 11, 22, 0.95) 0%, rgba(5, 11, 22, 0.82) 40%, rgba(5, 11, 22, 0.26) 68%, rgba(5, 11, 22, 0) 100%),
      linear-gradient(180deg, rgba(5, 11, 22, 0.08) 0%, rgba(5, 11, 22, 0.02) 52%, rgba(5, 11, 22, 0.70) 100%);
  }
  .hero-photo .hero-inner {
    align-items: flex-start;
    min-height: 600px;
    padding: 64px 32px 88px;
  }
  .hero-photo .hero-content {
    max-width: 640px;
  }
  .toolbar-grid { grid-template-columns: 1fr 1fr; }
  .tool:nth-child(2) { border-right: none; }
  .tool:nth-child(1),
  .tool:nth-child(2) { border-bottom: 1px solid var(--line); }
  .pain-grid { grid-template-columns: 1fr 1fr; }
  .scen-grid { grid-template-columns: 1fr 1fr; }
  .tech-split { grid-template-columns: 1fr; }
  .resource-master { grid-template-columns: 1fr; }
  .resource-grid { grid-template-columns: repeat(3, 1fr); }
  .timeline { grid-template-columns: repeat(4, 1fr); gap: 30px; }
  .timeline::before { display: none; }
  .trust-bar { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .hero-photo {
    min-height: 760px;
    background-position: 66% center;
  }
  .hero-photo .hero-bg {
    background:
      linear-gradient(180deg,
        rgba(5, 11, 22, 0.96) 0%,
        rgba(5, 11, 22, 0.88) 25%,
        rgba(5, 11, 22, 0.50) 44%,
        rgba(5, 11, 22, 0.18) 64%,
        rgba(5, 11, 22, 0.62) 100%);
  }
  .hero-photo .hero-inner {
    align-items: flex-start;
    min-height: 560px;
    padding: 56px 24px 64px;
    min-width: 0;
  }
  .hero-photo .hero-content {
    max-width: 100%;
    min-width: 0;
  }
  .hero-photo .hero-actions {
    margin-bottom: 0;
  }
}

@media (max-width: 640px) {
  .hero h1 { font-size: 38px; overflow-wrap: anywhere; }
  .hero-eyebrow { flex-wrap: wrap; max-width: 100%; }
  .hero-photo .hero-inner {
    align-items: flex-start;
    padding: 52px 20px 58px;
    min-height: 540px;
    min-width: 0;
  }
  .hero-content { max-width: 100%; min-width: 0; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .hero-photo .hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  .hero-photo .hero-actions .btn {
    width: 100%;
    flex: none;
    padding: 14px 18px;
  }
  .perf-row { grid-template-columns: 1fr 1fr; gap: 20px; }
  .toolbar { margin-top: -40px; }
  .toolbar-grid { grid-template-columns: 1fr; }
  .tool { border-right: none; border-bottom: 1px solid var(--line); }
  .tool:last-child { border-bottom: none; }
  .pain, .scenarios, .tech, .resources, .process, .trust { padding: 60px 0; }
  .pain { padding-top: 80px; }
  .pain-grid, .scen-grid { grid-template-columns: 1fr; }
  .resource-master { padding: 28px; }
  .resource-master h3 { font-size: 28px; }
  .resource-grid { grid-template-columns: 1fr 1fr; }
  .trust-bar { grid-template-columns: 1fr; padding: 28px; }
  .final-cta h2 { font-size: 36px; }
  .final-cta { padding: 60px 20px; }
}

/* ============================================
   首屏改版：设备图 / 数据条 / 四大优势 / 服务承诺
   ============================================ */

/* Hero 设备图 */
.hero-device {
  width: 100%;
  max-width: 620px;
  border-radius: var(--r-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
  display: block;
}

/* Hero 全宽数据条（铺在实景图上，加深底色保证读数清晰） */
.hero-stats {
  position: relative;
  z-index: 5;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(10, 22, 40, 0.55);
  backdrop-filter: blur(6px);
}

.hero-stats-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.hstat {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 26px 28px;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
}

.hstat:first-child { border-left: none; }

.hstat-icon { color: var(--accent-bright); flex-shrink: 0; }

.hstat-val {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  line-height: 1;
}

.hstat-val small {
  font-size: 14px;
  color: var(--accent-bright);
  font-weight: 600;
  margin-left: 2px;
}

.hstat-val.text { font-size: 19px; }

.hstat-lbl {
  font-size: 12px;
  color: #8595B0;
  margin-top: 6px;
  letter-spacing: 0.04em;
}

/* 四大核心优势 */
.advantages {
  background: #fff;
  padding: 80px 0;
}

.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.adv-card {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 32px 28px 36px;
  overflow: hidden;
  transition: all var(--t-base);
}

.adv-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.adv-icon { color: var(--accent); margin-bottom: 20px; }

.adv-card h4 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 0;
}

.adv-card h4::after {
  content: "";
  display: block;
  width: 28px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin-top: 12px;
}

.adv-card .adv-benefit {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  line-height: 1.4;
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 7px;
}

.adv-card .adv-benefit::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}

.adv-card p {
  font-size: 13.5px;
  color: var(--mute);
  line-height: 1.75;
  margin-top: 14px;
}

.adv-num {
  position: absolute;
  right: 18px;
  bottom: 2px;
  font-family: "Barlow Condensed", sans-serif;
  font-size: 64px;
  font-weight: 800;
  color: var(--ink);
  opacity: 0.045;
  line-height: 1;
}

/* 服务承诺条 */
.svc-strip {
  background: var(--ink);
  color: #fff;
}

.svc-grid {
  max-width: var(--container);
  margin: 0 auto;
  padding: 34px 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.svc-item { display: flex; align-items: center; gap: 16px; }

.svc-icon {
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-bright);
  flex-shrink: 0;
}

.svc-text strong { display: block; font-size: 14.5px; font-weight: 600; margin-bottom: 2px; }
.svc-text span { font-size: 12px; color: #A8B5C7; }

@media (max-width: 1024px) {
  .hero-device { max-width: 100%; }
  .hero-stats-inner { grid-template-columns: 1fr 1fr; }
  .hstat { border-top: 1px solid rgba(255, 255, 255, 0.08); }
  .hstat:nth-child(1), .hstat:nth-child(2) { border-top: none; }
  .hstat:nth-child(3) { border-left: none; }
  .adv-grid { grid-template-columns: 1fr 1fr; }
  .svc-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .hero-stats-inner { grid-template-columns: 1fr 1fr; padding: 0 20px; }
  .hstat {
    padding: 18px 10px;
    border-left: 1px solid rgba(255, 255, 255, 0.08);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }
  .hstat:nth-child(odd) { border-left: none; }
  .hstat:nth-child(1),
  .hstat:nth-child(2) { border-top: none; }
  .hstat-val { font-size: 28px; }
  .hstat-val.text { font-size: 16px; }
  .advantages { padding: 50px 0; }
  .adv-grid { grid-template-columns: 1fr; }
  .svc-grid { grid-template-columns: 1fr; gap: 20px; }
}

/* ============================================
   7. 服务质保（warranty）
   —— 浅色区 + 深色 bento 卡片，沿用全站 token
   ============================================ */
.warranty {
  background: var(--bg);
  padding: 100px 0;
}

.warranty .w-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 280px;
  gap: 18px;
}

.warranty .w-card {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-2);
  transition: transform var(--t-slow), box-shadow var(--t-slow);
  --bg: linear-gradient(135deg, #1B2A41 0%, #0A1628 100%);
}

.warranty .w-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--bg);
  background-size: cover;
  background-position: center;
  transition: transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
  z-index: 0;
}

.warranty .w-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 11, 22, 0.25) 0%, rgba(5, 11, 22, 0.55) 50%, rgba(5, 11, 22, 0.92) 100%);
  z-index: 1;
}

.warranty .w-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.warranty .w-card:hover::before { transform: scale(1.06); }

.warranty .w-body {
  position: relative;
  z-index: 2;
  height: 100%;
  padding: 28px 30px 26px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: #fff;
}

.warranty .w-tag {
  position: absolute;
  top: 24px;
  left: 30px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 99px;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  font-weight: 500;
  color: #fff;
  letter-spacing: 0.08em;
  z-index: 2;
}

.warranty .w-tag .dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent-bright);
  box-shadow: 0 0 6px var(--accent-bright);
}

.warranty .w-title {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  line-height: 1.35;
  margin-bottom: 10px;
}

.warranty .w-desc {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.7;
  max-width: 90%;
}

.warranty .w-arrow {
  position: absolute;
  right: 24px;
  bottom: 24px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  display: grid;
  place-items: center;
  color: #fff;
  z-index: 3;
  transition: all var(--t-base);
}

.warranty .w-card:hover .w-arrow {
  background: var(--accent);
  border-color: var(--accent);
  transform: translateX(3px);
}

/* 大卡 */
.warranty .w-card.lg { grid-column: span 1; grid-row: span 2; }
.warranty .w-card.lg .w-title { font-size: 30px; line-height: 1.3; margin-bottom: 14px; }
.warranty .w-card.lg .w-desc { font-size: 14.5px; line-height: 1.8; }
.warranty .w-card.lg .w-body { padding: 36px 36px 32px; }

/* 卡片背景预设（待客户图替换）。沿用站点蓝 #4A90FF */
.warranty .w-card[data-bg="machine"]::before {
  background-image:
    radial-gradient(60% 50% at 30% 70%, rgba(74, 144, 255, 0.35) 0%, transparent 60%),
    linear-gradient(135deg, #233247 0%, #0E1320 70%, #06090F 100%);
}
.warranty .w-card[data-bg="panel"]::before {
  background:
    radial-gradient(70% 60% at 70% 40%, rgba(74, 144, 255, 0.18) 0%, transparent 55%),
    linear-gradient(135deg, #1F2A3D 0%, #0E1320 100%);
}
.warranty .w-card[data-bg="parts"]::before {
  background:
    radial-gradient(60% 50% at 50% 30%, rgba(255, 184, 74, 0.12) 0%, transparent 55%),
    linear-gradient(135deg, #2A2418 0%, #1A1410 60%, #0E0B08 100%);
}
.warranty .w-card[data-bg="remote"]::before {
  background:
    radial-gradient(50% 70% at 50% 50%, rgba(74, 144, 255, 0.25) 0%, transparent 55%),
    linear-gradient(rgba(74, 144, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 144, 255, 0.06) 1px, transparent 1px),
    linear-gradient(180deg, #122039 0%, #0A1426 100%);
  background-size: 100% 100%, 30px 30px, 30px 30px, 100% 100%;
}
.warranty .w-card[data-bg="genuine"]::before {
  background:
    radial-gradient(70% 60% at 50% 100%, rgba(74, 144, 255, 0.20) 0%, transparent 60%),
    linear-gradient(135deg, #1A2233 0%, #0E1320 100%);
}

/* 底部数据条 */
.warranty .w-stats {
  margin-top: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 28px 40px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: center;
}
.warranty .w-stat {
  display: flex;
  align-items: center;
  gap: 18px;
  padding-right: 24px;
  border-right: 1px solid var(--line);
}
.warranty .w-stat:last-child { border-right: none; }
.warranty .w-stat-ico {
  width: 48px;
  height: 48px;
  border-radius: var(--r);
  background: var(--accent-light);
  color: var(--accent);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
.warranty .w-stat-text { flex: 1; min-width: 0; }
.warranty .w-stat-num {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1;
  margin-bottom: 6px;
}
.warranty .w-stat-lb { font-size: 13px; color: var(--mute); letter-spacing: 0.02em; }

/* ============================================
   8. 关于我们 + 预约咨询（about-contact）
   ============================================ */
.about-contact {
  background: #fff;
  padding: 100px 0;
}

.section-head.center {
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.section-head.center .left { flex: none; max-width: 680px; }
.about-contact .ac-sub {
  font-size: 15px;
  color: var(--mute);
  line-height: 1.75;
  margin-top: 14px;
}

.ac-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 24px;
}

/* 左：关于我们 + 视频 */
.ac-about {
  position: relative;
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
  border-radius: var(--r-xl);
  overflow: hidden;
  color: #fff;
  display: flex;
  flex-direction: column;
}

.ac-video {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #000;
  overflow: hidden;
}
.ac-poster {
  width: 100%;
  height: 100%;
  background:
    radial-gradient(70% 50% at 50% 40%, rgba(74, 144, 255, 0.25) 0%, transparent 60%),
    linear-gradient(135deg, var(--ink-2) 0%, var(--ink) 100%);
}
.ac-poster::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  -webkit-mask-image: radial-gradient(60% 60% at 50% 50%, #000 0%, transparent 70%);
  mask-image: radial-gradient(60% 60% at 50% 50%, #000 0%, transparent 70%);
}
/* 宣传片封面占位（暂无视频文件，诚实标注"即将上线"，不放可点击播放按钮） */
.ac-coming {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: rgba(255, 255, 255, 0.62);
  z-index: 2;
}
.ac-coming span {
  font-size: 13px;
  letter-spacing: 0.06em;
}

.ac-about-body {
  padding: 36px 40px 40px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.ac-about-eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent-bright);
  letter-spacing: 0.18em;
  margin-bottom: 14px;
}
.ac-about-title {
  font-size: 26px;
  font-weight: 700;
  color: #fff;
  line-height: 1.35;
  margin-bottom: 14px;
}
.ac-about-desc {
  font-size: 14px;
  color: #B8C5DD;
  line-height: 1.8;
  margin-bottom: 28px;
}
.ac-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: auto;
}
.ac-stat .n {
  font-family: "Barlow Condensed", sans-serif;
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  line-height: 1;
}
.ac-stat .n .u {
  font-size: 14px;
  color: #8595B0;
  margin-left: 4px;
  font-weight: 500;
}
.ac-stat .l {
  font-size: 12px;
  color: #8595B0;
  margin-top: 8px;
  letter-spacing: 0.02em;
}

/* 右：预约咨询表单 */
.ac-form-col { display: flex; }
.ac-form,
.ac-success {
  width: 100%;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: 40px 40px 36px;
  display: flex;
  flex-direction: column;
}
.ac-form-eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.18em;
  margin-bottom: 14px;
}
.ac-form-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.35;
  margin-bottom: 8px;
}
.ac-form-sub {
  font-size: 13.5px;
  color: var(--mute);
  line-height: 1.7;
  margin-bottom: 28px;
}
.ac-fg {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 14px;
}
.ac-fg.full { grid-template-columns: 1fr; }
.ac-field label {
  display: block;
  font-size: 12px;
  color: var(--steel);
  font-weight: 500;
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}
.ac-field .req { color: var(--danger); margin-left: 2px; }
.ac-field input,
.ac-field select,
.ac-field textarea {
  width: 100%;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 12px 14px;
  font-size: 14px;
  color: var(--ink);
  font-family: inherit;
  transition: all var(--t-fast);
  outline: none;
}
.ac-field textarea { resize: vertical; min-height: 80px; line-height: 1.6; }
.ac-field input::placeholder,
.ac-field textarea::placeholder { color: #B5BAC4; }
.ac-field input:focus,
.ac-field select:focus,
.ac-field textarea:focus {
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 4px var(--accent-light);
}
.ac-field select {
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236B7A95' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><path d='m6 9 6 6 6-6'/></svg>");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
  cursor: pointer;
}
.ac-agree {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 12.5px;
  color: var(--mute);
  line-height: 1.6;
  margin: 8px 0 20px;
  cursor: pointer;
  user-select: none;
}
.ac-agree input {
  appearance: none;
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--line);
  border-radius: 4px;
  flex-shrink: 0;
  margin-top: 2px;
  cursor: pointer;
  transition: all var(--t-fast);
  position: relative;
}
.ac-agree input:checked { background: var(--accent); border-color: var(--accent); }
.ac-agree input:checked::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 1px;
  width: 5px;
  height: 9px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.ac-agree a { color: var(--accent); }
.ac-agree a:hover { text-decoration: underline; }
.ac-submit {
  width: 100%;
  background: var(--ink);
  color: #fff;
  border: none;
  border-radius: var(--r);
  padding: 16px;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--t-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: auto;
}
.ac-submit:hover {
  background: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}
.ac-submit:disabled { opacity: 0.6; cursor: default; transform: none; }
.ac-form-msg { font-size: 13px; margin-top: 12px; text-align: center; min-height: 18px; }
.ac-form-msg.err { color: var(--danger); }
.ac-form-foot {
  margin-top: 16px;
  font-size: 12px;
  color: var(--mute);
  text-align: center;
  line-height: 1.7;
}
.ac-form-foot a { color: var(--accent); font-weight: 500; }

/* 成功态（默认隐藏，提交成功后由 JS 去掉 hidden 显示） */
.ac-success[hidden] { display: none; }
.ac-success { align-items: center; justify-content: center; text-align: center; }
.ac-success .tick {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--ok);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  margin: 0 auto 14px;
}
.ac-success h4 { font-size: 18px; color: var(--ink); margin-bottom: 6px; }
.ac-success p { font-size: 13px; color: var(--mute); max-width: 320px; }

/* 服务质保 + 关于我们 响应式 */
@media (max-width: 1024px) {
  .warranty, .about-contact { padding: 70px 0; }
  .warranty .w-grid { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 240px; }
  .warranty .w-card.lg { grid-column: span 2; grid-row: span 1; min-height: 340px; }
  .warranty .w-stats { grid-template-columns: repeat(2, 1fr); padding: 24px; }
  .warranty .w-stat:nth-child(2) { border-right: none; }
  .warranty .w-stat { padding-right: 0; }
  .ac-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .warranty, .about-contact { padding: 56px 0; }
  .warranty .w-grid { grid-template-columns: 1fr; grid-auto-rows: auto; }
  .warranty .w-card { min-height: 280px; }
  .warranty .w-card.lg { grid-column: span 1; min-height: 320px; }
  .warranty .w-stats { grid-template-columns: 1fr; gap: 18px; }
  .warranty .w-stat { border-right: none; border-bottom: 1px solid var(--line); padding-bottom: 18px; }
  .warranty .w-stat:last-child { border-bottom: none; padding-bottom: 0; }
  .ac-about-body, .ac-form, .ac-success { padding: 28px 24px; }
  .ac-fg { grid-template-columns: 1fr; }
  .ac-stats { gap: 16px; }
  .ac-stat .n { font-size: 26px; }
}