/* ==========================================================================
   XSL·Ye Robot — 小生来也机器人
   Design system: "Nameplate & Assembly Rail"
   --------------------------------------------------------------------------
   设计语言取自工业设备铭牌与工程图纸，而非通用 SaaS 营销页。
   规则：细线分割、等宽技术标签、角度切边、唯一暖色只给转化动作。
   ========================================================================== */

/* --- 1. Tokens ---------------------------------------------------------- */
:root {
  /* 色彩：品牌深蓝 + 传感器青 + 唯一暖色 */
  --ink: #070E1F;
  --ink-2: #0B1730;
  --ink-3: #12203C;
  --azurite: #0B3FA8;
  --azurite-lift: #1A56CC;
  --scan: #2FD3F5;
  --ember: #FF6A2B;
  --paper: #F4F6FA;
  --white: #FFFFFF;
  --steel: #56668A;
  --steel-2: #8B99B4;
  --line: #DDE3ED;
  --line-2: #E9EDF4;
  --line-dark: rgba(255, 255, 255, 0.15);
  --line-dark-2: rgba(255, 255, 255, 0.08);

  /* 字体 */
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-display: "Bahnschrift", "DIN Alternate", "Avenir Next Condensed",
    "PingFang SC", "Microsoft YaHei", var(--font-body);
  --font-mono: "Cascadia Mono", ui-monospace, SFMono-Regular, Consolas,
    "Liberation Mono", monospace;

  /* 字号阶 */
  --fs-display: clamp(2.4rem, 6.2vw, 4.5rem);
  --fs-h1: clamp(2rem, 4.6vw, 3.2rem);
  --fs-h2: clamp(1.6rem, 3.2vw, 2.35rem);
  --fs-h3: clamp(1.05rem, 1.6vw, 1.3rem);
  --fs-body: 1rem;
  --fs-sm: 0.9rem;
  --fs-label: 0.72rem;

  /* 间距节奏 */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;
  --sp-8: 64px;
  --sp-9: 96px;
  --pad-section: clamp(56px, 8.5vw, 116px);
  --wrap: 1220px;

  --radius: 3px;
  /* 工业面板四角切边 */
  --chamfer: polygon(
    0 0,
    calc(100% - 11px) 0,
    100% 11px,
    100% 100%,
    11px 100%,
    0 calc(100% - 11px)
  );
  --shadow-panel: 0 1px 2px rgba(7, 14, 31, 0.06), 0 12px 32px rgba(7, 14, 31, 0.07);
}

/* --- 2. Reset ----------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img,
svg {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
h1,
h2,
h3,
h4,
p,
ul,
ol,
figure,
blockquote {
  margin: 0;
}
ul,
ol {
  padding: 0;
  list-style: none;
}
button {
  font: inherit;
  color: inherit;
  border: 0;
  background: none;
  cursor: pointer;
}
:focus-visible {
  outline: 2px solid var(--scan);
  outline-offset: 3px;
}
::selection {
  background: var(--azurite);
  color: #fff;
}

/* --- 3. Layout primitives ---------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 40px);
}
.section {
  padding-block: var(--pad-section);
}
.section--tight {
  padding-block: clamp(40px, 5.5vw, 72px);
}
.section--dark {
  background: var(--ink);
  color: #fff;
}
.section--deep {
  background: var(--azurite);
  color: #fff;
}
.section--white {
  background: var(--white);
}
.grid {
  display: grid;
  gap: var(--sp-6);
}
@media (min-width: 860px) {
  .grid--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--sp-8);
  }
  .grid--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .grid--4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* --- 4. Type ----------------------------------------------------------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--azurite);
  margin-bottom: var(--sp-5);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  flex: none;
}
.section--dark .eyebrow,
.section--deep .eyebrow {
  color: var(--scan);
}
.display {
  font-family: var(--font-display);
  font-size: var(--fs-display);
  line-height: 1.05;
  letter-spacing: -0.015em;
  font-weight: 700;
  text-wrap: balance;
}
.h2 {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  line-height: 1.16;
  letter-spacing: -0.01em;
  font-weight: 700;
  text-wrap: balance;
}
.h3 {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: -0.005em;
}
.lede {
  font-size: clamp(1rem, 1.35vw, 1.15rem);
  color: var(--steel);
  max-width: 62ch;
}
.section--dark .lede,
.section--deep .lede {
  color: rgba(255, 255, 255, 0.74);
}
.mono {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.muted {
  color: var(--steel);
}
.section--dark .muted,
.section--deep .muted {
  color: var(--steel-2);
}
.accent {
  color: var(--scan);
}
.head-block {
  max-width: 74ch;
  margin-bottom: clamp(36px, 4.5vw, 60px);
}
.head-block .lede {
  margin-top: var(--sp-5);
}

/* --- 5. Header --------------------------------------------------------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(7, 14, 31, 0.86);
  backdrop-filter: saturate(150%) blur(14px);
  border-bottom: 1px solid var(--line-dark-2);
  color: #fff;
}
.topbar__inner {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
  min-height: 70px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  flex: none;
}
.brand__mark {
  width: 38px;
  height: 38px;
  flex: none;
}
.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand__text b {
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.brand__text i {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--scan);
  margin-top: 3px;
}
.nav {
  display: none;
  margin-left: auto;
  align-items: center;
  gap: var(--sp-6);
}
.nav a {
  font-size: 0.94rem;
  color: rgba(255, 255, 255, 0.8);
  padding-block: 6px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.nav a:hover,
.nav a[aria-current="page"] {
  color: #fff;
  border-bottom-color: var(--scan);
}
.nav__lang {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.16em;
  color: var(--scan) !important;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 5px 10px !important;
}
.nav__lang:hover {
  background: rgba(47, 211, 245, 0.12);
  border-color: var(--scan) !important;
}
/* 四语言切换：分段控件。四个语言平铺，比下拉少一次点击，
   用等宽小字压缩宽度，避免与导航和 CTA 抢空间 */
.nav__langs {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 2px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
}
.nav__langs a {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.05em;
  line-height: 1.2;
  padding: 4px 6px;
  border-radius: 2px;
  color: rgba(255, 255, 255, 0.7);
  white-space: nowrap;
  transition: background-color 0.18s, color 0.18s;
}
.nav__langs a:hover {
  color: #fff;
  background: rgba(47, 211, 245, 0.14);
}
.nav__langs a[aria-current="true"] {
  background: var(--scan);
  color: var(--ink);
  font-weight: 700;
}
/* 注意：这里必须比 .btn 的 display 更具体，否则「获取报价」在移动端不会隐藏 */
.topbar .topbar__cta {
  display: none;
}
.navtoggle {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 9px 12px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  color: #fff;
}
.navtoggle__bars {
  display: grid;
  gap: 3px;
}
.navtoggle__bars span {
  display: block;
  width: 15px;
  height: 1px;
  background: currentColor;
  transition: transform 0.22s, opacity 0.22s;
}
.navtoggle[aria-expanded="true"] .navtoggle__bars span:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}
.navtoggle[aria-expanded="true"] .navtoggle__bars span:nth-child(2) {
  opacity: 0;
}
.navtoggle[aria-expanded="true"] .navtoggle__bars span:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}
@media (min-width: 1000px) {
  .nav {
    display: flex;
  }
  .topbar .topbar__cta {
    display: inline-flex;
  }
  .navtoggle {
    display: none;
  }
}
/* 移动端抽屉 */
@media (max-width: 999px) {
  .nav {
    position: fixed;
    inset: 70px 0 auto;
    display: grid;
    gap: 0;
    margin: 0;
    padding: var(--sp-4) clamp(18px, 4vw, 40px) var(--sp-6);
    background: var(--ink-2);
    border-bottom: 1px solid var(--line-dark);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
    max-height: calc(100dvh - 70px);
    overflow: auto;
  }
  .nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .nav a {
    padding-block: var(--sp-4);
    border-bottom: 1px solid var(--line-dark-2);
    font-size: 1.05rem;
  }
  .nav a[aria-current="page"] {
    border-bottom-color: var(--line-dark-2);
    color: var(--scan);
  }
  .nav__lang {
    justify-self: start;
    margin-top: var(--sp-5);
  }
  .nav__langs {
    justify-self: start;
    margin-top: var(--sp-5);
  }
}

/* --- 6. Buttons -------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  padding: 14px 26px;
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: transform 0.18s, background-color 0.2s, border-color 0.2s,
    color 0.2s, box-shadow 0.2s;
  text-align: center;
}
.btn:hover {
  transform: translateY(-1px);
}
.btn__arw {
  font-family: var(--font-mono);
  font-size: 0.86em;
  transition: transform 0.2s;
}
.btn:hover .btn__arw {
  transform: translateX(3px);
}
.btn--ember {
  background: var(--ember);
  color: #fff;
  clip-path: var(--chamfer);
  border-radius: 0;
  padding: 15px 30px;
  box-shadow: 0 8px 22px rgba(255, 106, 43, 0.26);
}
.btn--ember:hover {
  background: #ff7f47;
}
.btn--solid {
  background: var(--azurite);
  color: #fff;
}
.btn--solid:hover {
  background: var(--azurite-lift);
}
.btn--ghost {
  border-color: var(--line-dark);
  color: #fff;
}
.btn--ghost:hover {
  border-color: var(--scan);
  color: var(--scan);
}
.btn--line {
  border-color: var(--line);
  color: var(--ink);
}
.btn--line:hover {
  border-color: var(--azurite);
  color: var(--azurite);
}
.btn--sm {
  padding: 10px 18px;
  font-size: 0.88rem;
}
.btn--block {
  width: 100%;
}
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-top: var(--sp-6);
}

/* --- 7. Hero ----------------------------------------------------------- */
.hero {
  position: relative;
  background: var(--ink);
  color: #fff;
  overflow: hidden;
  padding-block: clamp(48px, 7vw, 92px) 0;
}
.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(
      to right,
      var(--line-dark-2) 1px,
      transparent 1px
    ),
    linear-gradient(to bottom, var(--line-dark-2) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(120% 90% at 78% 12%, #000 0%, transparent 72%);
  -webkit-mask-image: radial-gradient(
    120% 90% at 78% 12%,
    #000 0%,
    transparent 72%
  );
}
.hero__glow {
  position: absolute;
  top: -18%;
  right: -8%;
  width: 62vw;
  max-width: 880px;
  aspect-ratio: 1;
  pointer-events: none;
  background: radial-gradient(
    circle,
    rgba(47, 211, 245, 0.16) 0%,
    rgba(11, 63, 168, 0.14) 38%,
    transparent 68%
  );
}
.hero__inner {
  position: relative;
  display: grid;
  gap: clamp(32px, 5vw, 56px);
  align-items: center;
}
@media (min-width: 980px) {
  .hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }
}
.hero__title {
  margin-block: var(--sp-6) var(--sp-5);
}
.hero__title em {
  font-style: normal;
  color: var(--scan);
}
.hero .lede {
  max-width: 52ch;
}
.hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3) var(--sp-5);
  margin-top: var(--sp-7);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--line-dark-2);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.62);
}
.hero__trust li {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.hero__trust li::before {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--scan);
  flex: none;
}
.hero__visual {
  position: relative;
  justify-self: center;
  width: min(100%, 460px);
}
.hero__visual svg {
  width: 100%;
  height: auto;
}
.scanline {
  animation: scan-sweep 5.6s cubic-bezier(0.65, 0, 0.35, 1) infinite;
}
@keyframes scan-sweep {
  0%,
  12% {
    transform: translateY(0);
    opacity: 0;
  }
  22% {
    opacity: 1;
  }
  78% {
    opacity: 1;
  }
  88%,
  100% {
    transform: translateY(122px);
    opacity: 0;
  }
}

/* --- 8. Nameplate (KPI 铭牌条) ----------------------------------------- */
.nameplate {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  background: var(--ink-2);
  border-top: 1px solid var(--line-dark);
}
@media (min-width: 760px) {
  .nameplate {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.nameplate__item {
  padding: clamp(22px, 3vw, 34px) clamp(18px, 2.4vw, 30px);
  border-right: 1px solid var(--line-dark-2);
  border-bottom: 1px solid var(--line-dark-2);
  position: relative;
}
.nameplate__item:nth-child(2n) {
  border-right: 0;
}
@media (min-width: 760px) {
  .nameplate__item {
    border-bottom: 0;
  }
  .nameplate__item:nth-child(2n) {
    border-right: 1px solid var(--line-dark-2);
  }
  .nameplate__item:last-child {
    border-right: 0;
  }
}
.nameplate__num {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.4vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: #fff;
}
.nameplate__num sup {
  font-size: 0.44em;
  top: -0.9em;
  color: var(--scan);
}
.nameplate__k {
  display: block;
  margin-top: var(--sp-3);
  font-size: 0.86rem;
  color: rgba(255, 255, 255, 0.66);
}

/* --- 9. Assembly rail (签名元素) --------------------------------------- */
.rail {
  position: relative;
  display: grid;
  gap: 0;
  margin-top: var(--sp-7);
}
.rail::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--line);
}
.section--dark .rail::before,
.section--deep .rail::before {
  background: var(--line-dark);
}
.rail__step {
  position: relative;
  padding: 0 0 var(--sp-7) 46px;
}
.rail__step:last-child {
  padding-bottom: 0;
}
.rail__node {
  position: absolute;
  left: 0;
  top: 3px;
  width: 27px;
  height: 27px;
  display: grid;
  place-items: center;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.02em;
  color: var(--steel);
  transition: background-color 0.4s, border-color 0.4s, color 0.4s,
    box-shadow 0.4s;
  z-index: 1;
}
.section--dark .rail__node,
.section--deep .rail__node {
  background: var(--ink);
  border-color: var(--line-dark);
  color: rgba(255, 255, 255, 0.66);
}
.section--white .rail__node {
  background: var(--white);
}
.rail__step.is-live .rail__node {
  background: var(--azurite);
  border-color: var(--azurite);
  color: #fff;
  box-shadow: 0 0 0 5px rgba(11, 63, 168, 0.1);
}
.section--dark .rail__step.is-live .rail__node,
.section--deep .rail__step.is-live .rail__node {
  background: var(--scan);
  border-color: var(--scan);
  color: var(--ink);
  box-shadow: 0 0 0 5px rgba(47, 211, 245, 0.14);
}
.rail__title {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 700;
  line-height: 1.3;
}
.rail__desc {
  margin-top: var(--sp-2);
  font-size: var(--fs-sm);
  color: var(--steel);
  max-width: 44ch;
}
.section--dark .rail__desc,
.section--deep .rail__desc {
  color: rgba(255, 255, 255, 0.66);
}
.rail__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}
.rail__tags li {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--steel);
}
.section--dark .rail__tags li,
.section--deep .rail__tags li {
  border-color: var(--line-dark);
  color: rgba(255, 255, 255, 0.7);
}
@media (min-width: 900px) {
  .rail {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: var(--sp-6);
  }
  .rail::before {
    left: 6px;
    right: 6px;
    top: 13px;
    bottom: auto;
    width: auto;
    height: 1px;
  }
  .rail__step {
    padding: 56px 0 0;
  }
  .rail__step:last-child {
    padding-bottom: 0;
  }
  .rail__node {
    top: 0;
  }
}

/* --- 10. Product matrix (品类规格表) ----------------------------------- */
.matrix {
  border-top: 1px solid var(--line);
}
.matrix__row {
  display: grid;
  gap: var(--sp-2) var(--sp-6);
  align-items: baseline;
  padding-block: clamp(22px, 2.8vw, 30px);
  border-bottom: 1px solid var(--line);
  position: relative;
  transition: background-color 0.22s;
}
.matrix__row::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--scan);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.28s ease;
}
.matrix__row:hover::before,
.matrix__row:focus-within::before {
  transform: scaleY(1);
}
.matrix__row:hover {
  background: rgba(11, 63, 168, 0.028);
}
@media (min-width: 900px) {
  .matrix__row {
    grid-template-columns: 118px minmax(0, 1fr) minmax(0, 1.15fr) 152px;
    align-items: center;
  }
}
.matrix__code {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.14em;
  color: var(--steel-2);
  text-transform: uppercase;
  white-space: nowrap;
}
.matrix__code b {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1.1;
}
.matrix__name {
  font-family: var(--font-display);
  font-size: clamp(1.12rem, 2vw, 1.42rem);
  font-weight: 700;
  letter-spacing: -0.005em;
  line-height: 1.25;
}
.matrix__name span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel-2);
  margin-top: 7px;
}
.matrix__desc {
  font-size: var(--fs-sm);
  color: var(--steel);
}
.matrix__desc .tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-3);
}
.matrix__desc .tags li {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 8px;
  background: var(--line-2);
  border-radius: 2px;
  color: var(--steel);
}
.matrix__act {
  justify-self: start;
}
@media (min-width: 900px) {
  .matrix__act {
    justify-self: end;
  }
}
.matrix__act a {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--azurite);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color 0.2s, color 0.2s;
}
.matrix__act a:hover {
  border-bottom-color: currentColor;
}

/* --- 11. Panels & cards (克制：细线，非投影堆叠) ----------------------- */
.panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(22px, 2.8vw, 32px);
  transition: border-color 0.22s, box-shadow 0.22s, transform 0.22s;
}
.panel--hover:hover {
  border-color: var(--azurite);
  box-shadow: var(--shadow-panel);
  transform: translateY(-2px);
}
.panel__kicker {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel-2);
}
.panel__title {
  margin-top: var(--sp-4);
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.32;
}
.panel__body {
  margin-top: var(--sp-3);
  font-size: var(--fs-sm);
  color: var(--steel);
}
.panel__list {
  margin-top: var(--sp-5);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--line-2);
  display: grid;
  gap: var(--sp-2);
}
.panel__list li {
  position: relative;
  padding-left: 16px;
  font-size: var(--fs-sm);
  color: var(--steel);
}
.panel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 1px;
  background: var(--azurite);
}
.panel--dark {
  background: var(--ink-2);
  border-color: var(--line-dark);
  color: #fff;
}
.panel--dark .panel__body,
.panel--dark .panel__list li {
  color: rgba(255, 255, 255, 0.7);
}
.panel--dark .panel__list {
  border-top-color: var(--line-dark-2);
}
.panel--dark .panel__list li::before {
  background: var(--scan);
}
.panel--dark .panel__kicker {
  color: var(--scan);
}

/* --- 12. Spec list (hairline 规格表) ----------------------------------- */
.spec {
  border-top: 1px solid var(--line);
}
.section--dark .spec,
.section--deep .spec {
  border-top-color: var(--line-dark);
}
.spec__row {
  display: grid;
  gap: var(--sp-1) var(--sp-6);
  padding-block: var(--sp-5);
  border-bottom: 1px solid var(--line);
}
.section--dark .spec__row,
.section--deep .spec__row {
  border-bottom-color: var(--line-dark-2);
}
@media (min-width: 760px) {
  .spec__row {
    grid-template-columns: 230px minmax(0, 1fr);
    align-items: start;
  }
}
.spec__k {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
}
.spec__v {
  font-size: var(--fs-sm);
  color: var(--steel);
}
.section--dark .spec__v,
.section--deep .spec__v {
  color: rgba(255, 255, 255, 0.72);
}

/* --- 13. Brand wall ---------------------------------------------------- */
.brandwall {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
@media (min-width: 620px) {
  .brandwall {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
/* 合作品牌为 8 项，4 列可整行排满，避免末行残留空位 */
@media (min-width: 980px) {
  .brandwall {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.brandwall li {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  min-height: 92px;
  display: grid;
  place-items: center;
  padding: var(--sp-4);
  text-align: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.02em;
  color: var(--steel);
  transition: color 0.2s, background-color 0.2s;
}
.brandwall li span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.56rem;
  letter-spacing: 0.14em;
  color: var(--steel-2);
  margin-top: 5px;
  text-transform: uppercase;
}
.brandwall li:hover {
  background: var(--white);
  color: var(--azurite);
}

/* --- 14. Scene / solution blocks --------------------------------------- */
.scene {
  display: grid;
  gap: var(--sp-6);
  padding-block: clamp(30px, 4vw, 46px);
  border-bottom: 1px solid var(--line);
}
@media (min-width: 900px) {
  .scene {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: var(--sp-8);
    align-items: start;
  }
}
.scene__idx {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.18em;
  color: var(--steel-2);
}
.scene__title {
  margin-top: var(--sp-3);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.6vw, 1.85rem);
  font-weight: 700;
  line-height: 1.2;
}
.scene__title span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel-2);
  margin-top: 8px;
}
.scene__body p {
  color: var(--steel);
  font-size: var(--fs-sm);
}
.scene__fit {
  margin-top: var(--sp-5);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--line-2);
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}
.scene__fit li {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--steel);
}

/* --- 15. Steps / FAQ --------------------------------------------------- */
.faq {
  border-top: 1px solid var(--line);
}
.faq details {
  border-bottom: 1px solid var(--line);
}
.faq summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--sp-5);
  padding-block: var(--sp-5);
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  list-style: none;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--azurite);
  flex: none;
  font-size: 1.15rem;
  line-height: 1;
  transition: transform 0.22s;
}
.faq details[open] summary::after {
  transform: rotate(45deg);
}
.faq p {
  padding-bottom: var(--sp-5);
  font-size: var(--fs-sm);
  color: var(--steel);
  max-width: 78ch;
}

/* --- 16. Forms --------------------------------------------------------- */
.form {
  display: grid;
  gap: var(--sp-5);
}
@media (min-width: 700px) {
  .form__2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    display: grid;
    gap: var(--sp-5);
  }
}
.field {
  display: grid;
  gap: var(--sp-2);
}
.field > label,
.fieldset__legend {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel);
}
.field .req {
  color: var(--ember);
}
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 13px 14px;
  font: inherit;
  font-size: 0.96rem;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.field textarea {
  min-height: 128px;
  resize: vertical;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--azurite);
  box-shadow: 0 0 0 3px rgba(11, 63, 168, 0.12);
}
.field__hint {
  font-size: 0.78rem;
  color: var(--steel-2);
}
.fieldset {
  border: 0;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--sp-3);
}
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}
.chips label {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 2px;
  font-size: 0.88rem;
  color: var(--steel);
  cursor: pointer;
  transition: border-color 0.18s, color 0.18s, background-color 0.18s;
}
.chips input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.chips label:hover {
  border-color: var(--azurite);
  color: var(--azurite);
}
.chips input:checked + span,
.chips label:has(input:checked) {
  border-color: var(--azurite);
  color: var(--azurite);
  background: rgba(11, 63, 168, 0.06);
}
.chips input:focus-visible ~ span {
  outline: 2px solid var(--scan);
  outline-offset: 2px;
}
.consent {
  display: flex;
  gap: var(--sp-3);
  align-items: flex-start;
  font-size: 0.8rem;
  color: var(--steel);
}
.consent input {
  margin-top: 5px;
  flex: none;
  accent-color: var(--azurite);
}
.form__status {
  font-size: var(--fs-sm);
  padding: var(--sp-4);
  border-radius: var(--radius);
  border: 1px solid transparent;
  display: none;
}
.form__status.is-error {
  display: block;
  border-color: #f0c2b3;
  background: #fdf1ec;
  color: #9c3d17;
}
.form__status.is-ok {
  display: block;
  border-color: #b6ddc9;
  background: #eef8f2;
  color: #1c6a45;
}

/* --- 17. Contact channels --------------------------------------------- */
/* 联系人卡片：一人一卡，渠道与号码分行对齐。
   号码来自实际对接口径，允许换行（break-all）以免长号码撑破卡片。 */
.contacts {
  display: grid;
  gap: var(--sp-5);
}
@media (min-width: 760px) {
  .contacts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
.contact-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(20px, 2.6vw, 28px);
}
.contact-card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-3);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--line);
}
.contact-card__name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.contact-card__role {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--steel-2);
  text-align: right;
}
.contact-list {
  display: grid;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}
.contact-list li {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: var(--sp-3);
  align-items: baseline;
  font-size: 0.9rem;
}
.contact-list .k {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel-2);
  white-space: nowrap;
}
.contact-list .v {
  color: var(--ink);
  word-break: break-all;
}
.contact-list a {
  color: var(--azurite);
  word-break: break-all;
}
.contact-list a:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.channels {
  display: grid;
  gap: var(--sp-3);
}
.channel {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: var(--sp-4) var(--sp-5);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.channel:hover {
  border-color: var(--azurite);
  transform: translateY(-1px);
  box-shadow: var(--shadow-panel);
}
.channel__ico {
  width: 38px;
  height: 38px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: 2px;
  background: rgba(11, 63, 168, 0.07);
  color: var(--azurite);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
}
.channel--wx .channel__ico {
  background: rgba(7, 193, 96, 0.1);
  color: #0a8f4c;
}
.channel--wa .channel__ico {
  background: rgba(37, 211, 102, 0.12);
  color: #128c4a;
}
.channel__t {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.98rem;
}
.channel__d {
  font-size: 0.8rem;
  color: var(--steel-2);
}
.channel__go {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--steel-2);
}

/* --- 18. Footer -------------------------------------------------------- */
.footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.72);
  padding-block: clamp(48px, 6vw, 76px) var(--sp-6);
  font-size: var(--fs-sm);
}
.footer__grid {
  display: grid;
  gap: var(--sp-7);
}
@media (min-width: 860px) {
  .footer__grid {
    grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
    gap: var(--sp-6);
  }
}
.footer h3 {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--scan);
  font-weight: 400;
  margin-bottom: var(--sp-5);
}
.footer a:hover {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.footer__links {
  display: grid;
  gap: var(--sp-3);
}
.footer__addr {
  display: grid;
  gap: var(--sp-3);
  font-style: normal;
}
.footer__addr li {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: var(--sp-3);
}
.footer__addr b {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--steel-2);
  font-weight: 400;
  padding-top: 3px;
}
.footer__social {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}
.footer__social li {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 10px;
  border: 1px solid var(--line-dark);
  border-radius: 2px;
  color: rgba(255, 255, 255, 0.72);
}
.footer__bar {
  margin-top: clamp(36px, 5vw, 56px);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--line-dark-2);
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3) var(--sp-5);
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--steel-2);
}
.footer__bar nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-5);
}

/* --- 19. Page hero (内页头图) ----------------------------------------- */
.phero {
  position: relative;
  background: var(--ink);
  color: #fff;
  padding-block: clamp(52px, 7vw, 88px) clamp(40px, 5vw, 64px);
  overflow: hidden;
}
.phero__rail {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel-2);
  margin-bottom: var(--sp-6);
}
.phero__rail a:hover {
  color: #fff;
}
.phero__rail span[aria-hidden] {
  color: var(--line-dark);
}
.phero .h2,
.phero .display {
  position: relative;
  z-index: 1;
}
.phero .lede {
  position: relative;
  z-index: 1;
  margin-top: var(--sp-5);
}

/* --- 20. CTA band ----------------------------------------------------- */
.ctaband {
  background: var(--azurite);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.ctaband__inner {
  display: grid;
  gap: var(--sp-6);
  align-items: center;
  position: relative;
  z-index: 1;
  padding-block: clamp(44px, 5.5vw, 72px);
}
@media (min-width: 900px) {
  .ctaband__inner {
    grid-template-columns: minmax(0, 1.4fr) auto;
  }
}
.ctaband .h2 {
  font-size: clamp(1.5rem, 2.8vw, 2.1rem);
}
.ctaband p {
  margin-top: var(--sp-4);
  color: rgba(255, 255, 255, 0.82);
  max-width: 60ch;
  font-size: var(--fs-sm);
}

/* --- 21. Floating contact + mobile dock ------------------------------- */
.fab {
  position: fixed;
  right: clamp(14px, 3vw, 26px);
  bottom: clamp(84px, 12vw, 30px);
  z-index: 70;
  display: grid;
  gap: var(--sp-3);
  justify-items: end;
  transition: opacity 0.25s ease, transform 0.25s ease;
}
/* 向下滚动阅读时收起：固定悬浮按钮会压住右下角正文，长段落页面尤其明显 */
.fab.is-tucked {
  opacity: 0;
  transform: translateY(14px);
  pointer-events: none;
}
@media (min-width: 860px) {
  .fab {
    bottom: 26px;
  }
}
.fab__btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 12px 16px;
  background: var(--ink);
  color: #fff;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  font-size: 0.86rem;
  box-shadow: 0 10px 26px rgba(7, 14, 31, 0.24);
  transition: transform 0.2s, background-color 0.2s, border-color 0.2s;
}
.fab__btn:hover {
  transform: translateY(-2px);
  background: var(--ink-2);
  border-color: var(--scan);
}
.fab__btn--wa .fab__dot {
  background: #25d366;
}
.fab__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--scan);
  flex: none;
  box-shadow: 0 0 0 3px rgba(47, 211, 245, 0.18);
}
.fab__label {
  white-space: nowrap;
}
@media (max-width: 620px) {
  .fab__label {
    display: none;
  }
  .fab__btn {
    padding: 13px;
  }
}
.dock {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 75;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  background: rgba(7, 14, 31, 0.96);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--line-dark);
  padding-bottom: env(safe-area-inset-bottom, 0);
}
@media (min-width: 860px) {
  .dock {
    display: none;
  }
}
.dock a {
  display: grid;
  place-items: center;
  gap: 3px;
  padding: 11px 6px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.7rem;
  text-align: center;
}
.dock a:active {
  background: rgba(255, 255, 255, 0.06);
}
.dock a.dock--primary {
  background: var(--ember);
  color: #fff;
  font-weight: 700;
}
@media (max-width: 859px) {
  body {
    padding-bottom: 62px;
  }
}

/* --- 22. Consent banner ---------------------------------------------- */
.consent-bar {
  position: fixed;
  left: clamp(12px, 3vw, 24px);
  right: clamp(12px, 3vw, 24px);
  bottom: clamp(74px, 10vw, 24px);
  z-index: 90;
  max-width: 720px;
  margin-inline: auto;
  background: var(--ink-2);
  color: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: var(--sp-5);
  box-shadow: 0 18px 44px rgba(7, 14, 31, 0.34);
  display: none;
  gap: var(--sp-4);
}
@media (min-width: 860px) {
  .consent-bar {
    bottom: 24px;
  }
}
.consent-bar.is-open {
  display: grid;
}
.consent-bar p {
  font-size: 0.84rem;
}
.consent-bar a {
  color: var(--scan);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.consent-bar__row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}
.consent-bar__row .btn {
  padding: 10px 18px;
  font-size: 0.86rem;
}

/* --- 23. Utilities --------------------------------------------------- */
.center {
  text-align: center;
}
.center .lede {
  margin-inline: auto;
}
.stack-sm > * + * {
  margin-top: var(--sp-4);
}
.mt-6 {
  margin-top: var(--sp-6);
}
.mt-7 {
  margin-top: var(--sp-7);
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--scan);
  color: var(--ink);
  padding: 10px 16px;
  font-weight: 700;
}
.skip:focus {
  left: 8px;
  top: 8px;
}

/* --- 24. Reveal on scroll ------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s cubic-bezier(0.22, 0.61, 0.36, 1),
    transform 0.6s cubic-bezier(0.22, 0.61, 0.36, 1);
  will-change: opacity, transform;
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}
.no-js .reveal {
  opacity: 1;
  transform: none;
}

/* --- 25. Reduced motion --------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  .scanline {
    opacity: 1;
    animation: none;
    transform: translateY(60px);
  }
}

/* --- 26. Print ------------------------------------------------------- */
@media print {
  .topbar,
  .fab,
  .dock,
  .consent-bar,
  .ctaband {
    display: none !important;
  }
}