/* ==========================================================================
   豆师傅 — 高端咖啡机维修与保养
   页面样式。所有数值均来自 variables.css(设计令牌),此处不硬编码颜色。
   字体令牌沿用 --font-arcadia / --font-arcadiadisplay 命名(源自原始设计
   体系),实际取值已是"拉丁优先 + 中文兜底"的字体栈。
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Reset & base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  background-color: var(--color-onyx-canvas);
  color: var(--color-ivory-text);
  font-family: var(--font-arcadia);
  font-size: var(--text-body);
  font-weight: var(--font-weight-regular);
  line-height: var(--leading-body);
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.is-locked {
  overflow: hidden;
}

h1,
h2,
h3,
h4,
p,
figure,
blockquote {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

input {
  font: inherit;
  color: inherit;
}

::selection {
  background: var(--color-accent);
  color: var(--color-accent-fg);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-md);
}

/* --------------------------------------------------------------------------
   2. Typography helpers (scale lives in tokens)
   -------------------------------------------------------------------------- */
.display {
  font-family: var(--font-arcadiadisplay);
  /* 视口自适应字号:320px 视口约 28.8px,560px 后稳定在 58px 上限。
     中文方块字比拉丁字母占位更宽,所以上限略低于原始设计的 65px;
     下限按最窄的 320px 屏幕反推,保证长句标题不会挤成三四行。 */
  font-size: clamp(29px, 10.4vw, var(--text-display));
  font-weight: var(--font-weight-w480);
  line-height: var(--leading-display);
  letter-spacing: var(--tracking-display);
  color: var(--color-pure-white);
}

/* 内页标题:首页首屏之外的页面层级,单独一档并随视口缩放 */
.page-title {
  font-family: var(--font-arcadiadisplay);
  font-size: clamp(25px, 8.4vw, var(--text-page-title));
  font-weight: var(--font-weight-w480);
  line-height: var(--leading-page-title);
  letter-spacing: var(--tracking-heading-lg);
  color: var(--color-pure-white);
}

.heading-lg {
  font-family: var(--font-arcadiadisplay);
  font-size: clamp(26px, 3.2vw, var(--text-heading-lg));
  font-weight: var(--font-weight-w480);
  line-height: var(--leading-heading-lg);
  letter-spacing: var(--tracking-heading-lg);
}

.heading {
  font-family: var(--font-arcadiadisplay);
  font-size: clamp(23px, 2.6vw, var(--text-heading));
  font-weight: var(--font-weight-w480);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.heading-sm {
  font-family: var(--font-arcadiadisplay);
  font-size: clamp(20px, 2.2vw, var(--text-heading-sm));
  font-weight: var(--font-weight-w480);
  line-height: var(--leading-heading-sm);
  letter-spacing: var(--tracking-heading-sm);
}

.subheading {
  font-size: var(--text-subheading);
  font-weight: var(--font-weight-w480);
  line-height: var(--leading-subheading);
}

.body-lg {
  font-size: var(--text-body-lg);
  font-weight: var(--font-weight-w480);
  line-height: var(--leading-body-lg);
}

.body {
  font-size: var(--text-body);
  font-weight: var(--font-weight-regular);
  line-height: var(--leading-body);
}

.body-sm {
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-w420);
  line-height: var(--leading-body-sm);
  letter-spacing: var(--tracking-body-sm);
}

.caption {
  font-size: var(--text-caption);
  font-weight: var(--font-weight-w480);
  line-height: var(--leading-caption);
  letter-spacing: 0.01em;
}

.muted {
  color: var(--color-ash-text);
}

.eyebrow {
  font-size: var(--text-caption);
  font-weight: var(--font-weight-w480);
  line-height: 1.4;
  /* 中文标签:全角字符需要适度字距才透气,但远小于拉丁大写所需的 0.14em */
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ash-text);
}

/* --------------------------------------------------------------------------
   3. Layout primitives
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--page-max-width);
  margin-inline: auto;
  padding-inline: var(--spacing-32);
}

.section {
  position: relative;
  padding-block: var(--spacing-112);
}

.section--tight {
  padding-block: var(--spacing-72);
}

.section__head {
  max-width: 720px;
  margin-bottom: var(--spacing-56);
}

.section__head--center {
  margin-inline: auto;
  text-align: center;
}

.section__head .eyebrow {
  display: block;
  margin-bottom: var(--spacing-16);
}

.section__head h2 + p {
  margin-top: var(--spacing-20);
}

.grid {
  display: grid;
  gap: var(--spacing-24);
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--spacing-56);
  align-items: center;
}

.split--reverse .split__media {
  order: -1;
}

/* --------------------------------------------------------------------------
   4. Image treatment — every visual is Background.png
   -------------------------------------------------------------------------- */
.img {
  background-image: var(--img, url("../../img/Background.png"));
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-color: var(--color-graphite-card);
}

.media-frame {
  position: relative;
  border-radius: var(--radius-cards);
  overflow: hidden;
  background-color: var(--color-graphite-card);
}

.media-frame .img {
  width: 100%;
  height: 100%;
  transition: transform 900ms cubic-bezier(0.22, 1, 0.36, 1);
}

.media-frame:hover .img {
  transform: scale(1.04);
}

/* Content-bearing frames size themselves: `.mock` participates in flow rather
   than floating in a fixed-height box, so no frame can end up with a dead band
   of empty background below its content. */
.media-frame--banner {
  aspect-ratio: 3 / 1;
  min-height: 300px;
  max-height: 400px;
}

/* Cinematic dark treatment so photography sits inside the onyx plane */
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(var(--canvas-rgb), 0.28) 0%, rgba(var(--canvas-rgb), 0.72) 100%),
    radial-gradient(120% 90% at 50% 10%, rgba(var(--canvas-rgb), 0) 0%, rgba(var(--canvas-rgb), 0.55) 100%);
}

.media-frame--tint::after {
  background:
    linear-gradient(180deg, rgba(var(--canvas-rgb), 0.42) 0%, rgba(var(--canvas-rgb), 0.86) 100%),
    radial-gradient(120% 90% at 50% 0%, rgba(var(--canvas-rgb), 0.1) 0%, rgba(var(--canvas-rgb), 0.6) 100%);
}

/* --------------------------------------------------------------------------
   5. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-8);
  border-radius: var(--radius-buttons);
  font-size: var(--text-body);
  font-weight: var(--font-weight-regular);
  line-height: 1;
  padding: 14px var(--spacing-24);
  border: 1px solid transparent;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background-color 220ms ease,
    border-color 220ms ease,
    color 220ms ease,
    transform 220ms cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 220ms ease;
}

.btn:active {
  transform: translateY(1px);
}

/* Primary — 中度烘焙豆棕实心按钮,整个页面唯一的强调色动作。
   保持体系要求的完全纯平:不加内高光、不加描边、不加外投影,
   按钮轮廓完全由填充色与底色的明度差建立。 */
.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-accent-fg);
}

.btn--primary:hover {
  background-color: var(--color-accent-hover);
}

.btn--primary:active {
  background-color: var(--color-accent-active);
}

/* Ghost — secondary/tertiary on dark */
.btn--ghost {
  background-color: transparent;
  border-color: var(--color-ivory-text);
  color: var(--color-ivory-text);
}

.btn--ghost:hover {
  background-color: var(--color-ivory-text);
  color: var(--color-onyx-canvas);
}

/* Obsidian — quiet interactive surface */
.btn--obsidian {
  background-color: var(--color-obsidian-button);
  color: var(--color-ivory-text);
}

.btn--obsidian:hover {
  background-color: var(--color-elevated);
}

.btn--block {
  width: 100%;
}

.btn--lg {
  padding: 18px var(--spacing-32);
}

/* Text link with sliding underline */
.link-underline {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-ivory-text);
  transition: color 200ms ease;
}

.link-underline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -3px;
  height: 1px;
  width: 100%;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 320ms cubic-bezier(0.22, 1, 0.36, 1);
}

.link-underline:hover {
  color: var(--color-pure-white);
}

.link-underline:hover::after {
  transform: scaleX(1);
}

.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-8);
  font-size: var(--text-body);
  color: var(--color-ivory-text);
  transition: gap 260ms cubic-bezier(0.22, 1, 0.36, 1), color 200ms ease;
}

.arrow-link svg {
  transition: transform 260ms cubic-bezier(0.22, 1, 0.36, 1);
}

.arrow-link:hover {
  color: var(--color-pure-white);
}

.arrow-link:hover svg {
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   6. Brand mark
   -------------------------------------------------------------------------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-ivory-text);
}

.brand__mark {
  width: 26px;
  height: 26px;
  flex: none;
  transition: transform 500ms cubic-bezier(0.22, 1, 0.36, 1);
}

.brand:hover .brand__mark {
  transform: rotate(90deg);
}

.brand__word {
  font-family: var(--font-arcadiadisplay);
  font-size: var(--text-subheading);
  font-weight: var(--font-weight-w480);
  letter-spacing: 0.01em;
  line-height: 1;
}

/* --------------------------------------------------------------------------
   7. Navigation
   -------------------------------------------------------------------------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  padding-block: var(--spacing-16);
  background-color: transparent;
  border-bottom: 1px solid transparent;
  transition:
    background-color 380ms ease,
    border-color 380ms ease,
    backdrop-filter 380ms ease,
    padding 380ms ease;
}

.nav::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(var(--canvas-rgb), 0.72) 0%, rgba(var(--canvas-rgb), 0) 100%);
  opacity: 1;
  transition: opacity 380ms ease;
  pointer-events: none;
}

.nav.is-scrolled {
  padding-block: 10px;
  background-color: rgba(var(--canvas-rgb), 0.72);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  backdrop-filter: blur(20px) saturate(140%);
  border-bottom-color: rgba(var(--mist-rgb), 0.1);
}

.nav.is-scrolled::before {
  opacity: 0;
}

.nav__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--spacing-32);
}

.nav__brand {
  flex: none;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  margin-inline: auto;
}

.nav__item {
  position: relative;
}

.nav__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px var(--spacing-20);
  border-radius: var(--radius-nav);
  font-size: var(--text-body);
  font-weight: var(--font-weight-regular);
  color: var(--color-ivory-text);
  background-color: transparent;
  transition: background-color 240ms ease, color 240ms ease;
}

.nav__link:hover,
.nav__item.is-open > .nav__link {
  background-color: rgba(var(--ivory-rgb), 0.1);
  color: var(--color-pure-white);
}

.nav__link.is-active {
  background-color: rgba(var(--ivory-rgb), 0.14);
  color: var(--color-pure-white);
}

.nav__caret {
  width: 10px;
  height: 10px;
  transition: transform 260ms cubic-bezier(0.22, 1, 0.36, 1);
}

.nav__item.is-open .nav__caret {
  transform: rotate(180deg);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-16);
  flex: none;
}

.nav__login {
  padding: 10px 6px;
  font-size: var(--text-body);
  color: var(--color-ivory-text);
  transition: color 200ms ease;
}

.nav__login:hover {
  color: var(--color-pure-white);
}

.nav__cta {
  padding: 10px var(--spacing-20);
}

/* Dropdown panels */
.dropdown {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  width: min(640px, calc(100vw - 64px));
  padding: var(--spacing-24);
  border-radius: var(--radius-cards);
  background-color: rgba(var(--graphite-rgb), 0.92);
  -webkit-backdrop-filter: blur(24px) saturate(150%);
  backdrop-filter: blur(24px) saturate(150%);
  border: 1px solid rgba(var(--mist-rgb), 0.1);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, -8px);
  transition:
    opacity 260ms ease,
    transform 320ms cubic-bezier(0.22, 1, 0.36, 1),
    visibility 260ms ease;
}

.nav__item.is-open .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.dropdown--wide {
  width: min(880px, calc(100vw - 64px));
}

.dropdown__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--spacing-8);
}

.dropdown--wide .dropdown__grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.dropdown__link {
  display: flex;
  gap: var(--spacing-12);
  padding: var(--spacing-12);
  border-radius: var(--radius-lg);
  transition: background-color 220ms ease;
}

.dropdown__link:hover {
  background-color: rgba(var(--ivory-rgb), 0.07);
}

.dropdown__icon {
  width: 32px;
  height: 32px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: var(--radius-lg);
  background-color: var(--color-obsidian-button);
  color: var(--color-ivory-text);
}

.dropdown__icon svg {
  width: 16px;
  height: 16px;
}

.dropdown__title {
  display: block;
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-w480);
  color: var(--color-ivory-text);
  line-height: 1.2;
}

.dropdown__desc {
  display: block;
  margin-top: 4px;
  font-size: var(--text-caption);
  font-weight: var(--font-weight-regular);
  line-height: 1.4;
  color: var(--color-ash-text);
}

.nav__toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-buttons);
  place-items: center;
  background-color: rgba(var(--ivory-rgb), 0.08);
}

.nav__toggle span {
  position: relative;
  display: block;
  width: 18px;
  height: 1.5px;
  background-color: var(--color-ivory-text);
  transition: transform 300ms cubic-bezier(0.22, 1, 0.36, 1), background-color 200ms ease;
}

.nav__toggle span::before,
.nav__toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 1.5px;
  background-color: var(--color-ivory-text);
  transition: transform 300ms cubic-bezier(0.22, 1, 0.36, 1), opacity 200ms ease;
}

.nav__toggle span::before {
  top: -6px;
}

.nav__toggle span::after {
  top: 6px;
}

.nav__toggle.is-open span {
  background-color: transparent;
}

.nav__toggle.is-open span::before {
  transform: translateY(6px) rotate(45deg);
}

.nav__toggle.is-open span::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile drawer */
.drawer {
  position: fixed;
  inset: 0;
  z-index: 99;
  padding: 104px var(--spacing-32) var(--spacing-40);
  background-color: rgba(var(--canvas-rgb), 0.96);
  -webkit-backdrop-filter: blur(24px);
  backdrop-filter: blur(24px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition:
    opacity 320ms ease,
    transform 380ms cubic-bezier(0.22, 1, 0.36, 1),
    visibility 320ms ease;
  overflow-y: auto;
}

.drawer.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.drawer__group + .drawer__group {
  margin-top: var(--spacing-32);
  padding-top: var(--spacing-32);
  border-top: 1px solid rgba(var(--mist-rgb), 0.1);
}

.drawer__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-16) 0;
  font-family: var(--font-arcadiadisplay);
  font-size: var(--text-subheading);
  font-weight: var(--font-weight-w480);
  color: var(--color-ivory-text);
  border-bottom: 1px solid rgba(var(--mist-rgb), 0.07);
  transition: color 200ms ease, padding-left 260ms cubic-bezier(0.22, 1, 0.36, 1);
}

.drawer__link:hover {
  color: var(--color-pure-white);
  padding-left: var(--spacing-8);
}

.drawer__link svg {
  width: 16px;
  height: 16px;
  opacity: 0.6;
}

.drawer__actions {
  margin-top: var(--spacing-32);
  display: grid;
  gap: var(--spacing-12);
}

/* --------------------------------------------------------------------------
   8. Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 160px var(--spacing-32) var(--spacing-112);
  overflow: hidden;
  isolation: isolate;
}

.hero__bg {
  position: absolute;
  inset: -8% -4% -12% -4%;
  z-index: -2;
  background-image: url("../../img/Background.png");
  background-size: cover;
  background-position: center;
  will-change: transform;
  transform: translate3d(0, 0, 0) scale(1.02);
}

.hero__scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(var(--canvas-rgb), 0.86) 0%, rgba(var(--canvas-rgb), 0.6) 42%, rgba(var(--canvas-rgb), 0.96) 100%),
    radial-gradient(90% 70% at 50% 45%, rgba(var(--canvas-rgb), 0.26) 0%, rgba(var(--canvas-rgb), 0.86) 100%);
}

.hero__grain {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.35;
  pointer-events: none;
  background-image: radial-gradient(rgba(var(--ivory-rgb), 0.06) 1px, transparent 1px);
  background-size: 3px 3px;
}

.hero__inner {
  position: relative;
  width: 100%;
  max-width: 760px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-32);
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-8);
  padding: 8px var(--spacing-16);
  border-radius: var(--radius-tags);
  border: 1px solid rgba(var(--mist-rgb), 0.16);
  background-color: rgba(var(--obsidian-rgb), 0.5);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  font-size: var(--text-caption);
  font-weight: var(--font-weight-w480);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ash-text);
}

.hero__badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent-amber);
  box-shadow: 0 0 0 0 rgba(var(--color-accent-rgb), 0.6);
  animation: pulse 2.6s ease-out infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(var(--color-accent-rgb), 0.55); }
  70% { box-shadow: 0 0 0 9px rgba(var(--color-accent-rgb), 0); }
  100% { box-shadow: 0 0 0 0 rgba(var(--color-accent-rgb), 0); }
}

.hero__title {
  color: var(--color-pure-white);
}

.hero__title .line {
  display: block;
  overflow: hidden;
}

.hero__title .line > span {
  display: block;
  transform: translateY(105%);
  opacity: 0;
}

.is-ready .hero__title .line > span {
  animation: line-up 1100ms cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.is-ready .hero__title .line:nth-child(1) > span { animation-delay: 120ms; }
.is-ready .hero__title .line:nth-child(2) > span { animation-delay: 240ms; }

@keyframes line-up {
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.hero__sub {
  max-width: 560px;
  color: var(--color-ivory-text);
}

.hero__form {
  width: 100%;
  max-width: 520px;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
}

.hero__field {
  display: flex;
  align-items: stretch;
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-inputs);
  transition: box-shadow 260ms ease;
}

.hero__field:focus-within {
  box-shadow: 0 0 0 3px rgba(var(--color-accent-rgb), 0.42);
}

.hero__input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 15px var(--spacing-20);
  background-color: rgba(var(--obsidian-rgb), 0.45);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-ivory-text);
  border-right: 0;
  border-radius: var(--radius-inputs) 0 0 var(--radius-inputs);
  font-size: var(--text-body);
  font-weight: var(--font-weight-regular);
  color: var(--color-ivory-text);
  transition: border-color 240ms ease, background-color 240ms ease;
  outline: none;
}

.hero__input::placeholder {
  color: var(--color-ash-text);
}

.hero__field.is-invalid .hero__input {
  border-color: var(--color-danger);
  color: var(--color-danger-soft);
}

.hero__field.is-invalid {
  animation: shake 420ms cubic-bezier(0.36, 0.07, 0.19, 0.97);
}

@keyframes shake {
  10%, 90% { transform: translateX(-1px); }
  20%, 80% { transform: translateX(2px); }
  30%, 50%, 70% { transform: translateX(-4px); }
  40%, 60% { transform: translateX(4px); }
}

.hero__submit {
  flex: 0 0 auto;
  align-self: stretch;
  height: auto;
  border: 0;
  border-radius: 0 var(--radius-inputs) var(--radius-inputs) 0;
  padding-inline: var(--spacing-32);
}

.hero__form-msg {
  min-height: 20px;
  font-size: var(--text-body-sm);
  line-height: 1.4;
  color: var(--color-ash-text);
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 260ms ease, transform 260ms ease;
}

.hero__form-msg.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.hero__form-msg[data-state="error"] {
  color: var(--color-danger-strong);
}

.hero__form-msg[data-state="success"] {
  color: var(--color-ivory-text);
}

.hero__note {
  font-size: var(--text-caption);
  font-weight: var(--font-weight-regular);
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--color-ash-text);
  max-width: 460px;
}

.hero__scroll {
  position: absolute;
  left: 50%;
  bottom: var(--spacing-32);
  transform: translateX(-50%);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-8);
  font-size: var(--text-caption);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ash-text);
  transition: color 200ms ease, opacity 400ms ease;
}

.hero__scroll:hover {
  color: var(--color-ivory-text);
}

.hero__scroll.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.hero__scroll svg {
  width: 14px;
  height: 14px;
  animation: nudge 2.2s ease-in-out infinite;
}

@keyframes nudge {
  0%, 100% { transform: translateY(0); opacity: 0.55; }
  50% { transform: translateY(5px); opacity: 1; }
}

/* Entrance for non-headline hero items */
.hero__reveal {
  opacity: 0;
  transform: translateY(18px);
}

.is-ready .hero__reveal {
  animation: fade-up 900ms cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.is-ready .hero__reveal:nth-child(1) { animation-delay: 60ms; }
.is-ready .hero__badge.hero__reveal { animation-delay: 60ms; }
.is-ready .hero__sub.hero__reveal { animation-delay: 420ms; }
.is-ready .hero__form.hero__reveal { animation-delay: 540ms; }
.is-ready .hero__note.hero__reveal { animation-delay: 640ms; }

@keyframes fade-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   9. Logo / trust strip with marquee
   -------------------------------------------------------------------------- */
.trust {
  padding-block: var(--spacing-40);
  border-top: 1px solid rgba(var(--mist-rgb), 0.08);
  border-bottom: 1px solid rgba(var(--mist-rgb), 0.08);
}

.trust__label {
  text-align: center;
  margin-bottom: var(--spacing-24);
}

.marquee {
  position: relative;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, var(--color-shadow) 12%, var(--color-shadow) 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, var(--color-shadow) 12%, var(--color-shadow) 88%, transparent);
}

.marquee__track {
  display: flex;
  align-items: center;
  gap: var(--spacing-56);
  width: max-content;
  animation: marquee 42s linear infinite;
}

.marquee:hover .marquee__track {
  animation-play-state: paused;
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* 品牌项只由文字构成:中文名为主,英文原名作次要信息(不放大写,避免品牌名走形) */
.marquee__item {
  display: inline-flex;
  align-items: baseline;
  gap: var(--spacing-12);
  flex: none;
  white-space: nowrap;
}

.marquee__zh {
  font-family: var(--font-arcadiadisplay);
  font-size: var(--text-subheading);
  font-weight: var(--font-weight-w480);
  letter-spacing: 0;
  color: rgba(var(--ivory-rgb), 0.78);
  transition: color 260ms ease;
}

.marquee__en {
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-w420);
  letter-spacing: 0.01em;
  color: rgba(var(--ash-rgb), 0.5);
  transition: color 260ms ease;
}

.marquee__item:hover .marquee__zh {
  color: var(--color-pure-white);
}

.marquee__item:hover .marquee__en {
  color: rgba(var(--ash-rgb), 0.78);
}

/* --------------------------------------------------------------------------
   10. Cards
   -------------------------------------------------------------------------- */
.card {
  position: relative;
  background-color: var(--color-graphite-card);
  border-radius: var(--radius-cards);
  padding: var(--card-padding);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-16);
  overflow: hidden;
  transition: transform 420ms cubic-bezier(0.22, 1, 0.36, 1), background-color 420ms ease;
}

.card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    420px circle at var(--mx, 50%) var(--my, 0%),
    rgba(var(--ivory-rgb), 0.07),
    transparent 62%
  );
  opacity: 0;
  transition: opacity 400ms ease;
  pointer-events: none;
}

.card:hover {
  transform: translateY(-4px);
  background-color: var(--color-graphite-raised);
}

.card:hover::after {
  opacity: 1;
}

.card__icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-lg);
  background-color: var(--color-obsidian-button);
  color: var(--color-ivory-text);
  margin-bottom: var(--spacing-4);
}

.card__icon svg {
  width: 20px;
  height: 20px;
}

.card h3 {
  color: var(--color-ivory-text);
}

.card p {
  color: var(--color-ivory-text);
}

.card__meta {
  margin-top: auto;
  padding-top: var(--spacing-16);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(var(--mist-rgb), 0.1);
}

.card__tag {
  display: inline-flex;
  align-items: center;
  padding: 6px var(--spacing-12);
  border-radius: var(--radius-tags);
  background-color: var(--color-obsidian-button);
  font-size: var(--text-caption);
  font-weight: var(--font-weight-w480);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ash-text);
}

.card--feature {
  padding: 0;
  gap: 0;
}

.card--feature .card__media {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.card--feature .card__media .img {
  width: 100%;
  height: 100%;
  transition: transform 900ms cubic-bezier(0.22, 1, 0.36, 1);
}

.card--feature:hover .card__media .img {
  transform: scale(1.06);
}

.card--feature .card__body {
  padding: var(--card-padding);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
}

/* --------------------------------------------------------------------------
   11. Stats band
   -------------------------------------------------------------------------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--spacing-24);
}

.stat {
  padding: var(--spacing-32);
  border-radius: var(--radius-cards);
  background-color: var(--color-graphite-card);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-8);
}

.stat__value {
  font-family: var(--font-arcadiadisplay);
  font-size: var(--text-heading-lg);
  font-weight: var(--font-weight-w480);
  line-height: var(--leading-heading-lg);
  letter-spacing: var(--tracking-heading-lg);
  color: var(--color-pure-white);
  font-variant-numeric: tabular-nums;
}

.stat__label {
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-w420);
  line-height: 1.45;
  color: var(--color-ash-text);
}

/* --------------------------------------------------------------------------
   12. Split feature blocks
   -------------------------------------------------------------------------- */
.split__copy {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-20);
  align-items: flex-start;
}

.split__copy h2 {
  color: var(--color-ivory-text);
}

.checklist {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
}

.checklist li {
  display: flex;
  gap: var(--spacing-12);
  align-items: flex-start;
  font-size: var(--text-body);
  line-height: 1.5;
  color: var(--color-ivory-text);
}

.checklist svg {
  width: 18px;
  height: 18px;
  flex: none;
  margin-top: 4px;
  color: var(--color-ivory-text);
  opacity: 0.8;
}

/* Product UI mock inside media frames */
.mock {
  position: relative;
  z-index: 1;
  padding: var(--spacing-32);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-16);
}

.mock__bar {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
}

.mock__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: rgba(var(--ivory-rgb), 0.2);
}

.mock__panel {
  border-radius: var(--radius-lg);
  background-color: rgba(var(--canvas-rgb), 0.72);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(var(--mist-rgb), 0.1);
  padding: var(--spacing-24);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
}

.mock__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-16);
  font-size: var(--text-body-sm);
  color: var(--color-ivory-text);
}

.mock__row .muted {
  font-size: var(--text-caption);
}

.mock__amount {
  font-variant-numeric: tabular-nums;
  font-weight: var(--font-weight-w480);
}

.mock__badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: var(--radius-tags);
  background-color: rgba(var(--color-accent-rgb), 0.18);
  color: var(--color-amber-pale);
  font-size: var(--text-caption);
  font-weight: var(--font-weight-w480);
  letter-spacing: 0.04em;
}

.mock__spark {
  width: 100%;
  height: 72px;
}

.mock__spark path {
  stroke-dasharray: 400;
  stroke-dashoffset: 400;
  transition: stroke-dashoffset 1600ms cubic-bezier(0.22, 1, 0.36, 1);
}

.is-visible .mock__spark path {
  stroke-dashoffset: 0;
}

/* Tab switcher */
.tabs {
  display: flex;
  gap: var(--spacing-4);
  padding: var(--spacing-4);
  border-radius: var(--radius-buttons);
  background-color: var(--color-graphite-card);
  width: max-content;
  max-width: 100%;
  overflow-x: auto;
  scrollbar-width: none;
}

.tabs::-webkit-scrollbar {
  display: none;
}

.tab {
  padding: 10px var(--spacing-20);
  border-radius: var(--radius-buttons);
  font-size: var(--text-body-sm);
  font-weight: var(--font-weight-w420);
  color: var(--color-ash-text);
  white-space: nowrap;
  transition: background-color 280ms ease, color 280ms ease;
}

.tab:hover {
  color: var(--color-ivory-text);
}

.tab.is-active {
  background-color: var(--color-obsidian-button);
  color: var(--color-ivory-text);
}

.tabpanel {
  display: none;
}

.tabpanel.is-active {
  display: block;
  animation: fade-up 520ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* --------------------------------------------------------------------------
   13. Testimonials carousel
   -------------------------------------------------------------------------- */
.carousel {
  position: relative;
}

.carousel__viewport {
  overflow: hidden;
  border-radius: var(--radius-cards);
}

.carousel__track {
  display: flex;
  transition: transform 640ms cubic-bezier(0.22, 1, 0.36, 1);
  cursor: grab;
}

.carousel__track.is-dragging {
  cursor: grabbing;
  transition: none;
}

.slide {
  flex: 0 0 100%;
  padding: var(--spacing-56);
  background-color: var(--color-graphite-card);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-32);
  user-select: none;
}

.slide__quote {
  font-family: var(--font-arcadiadisplay);
  font-size: var(--text-heading-sm);
  font-weight: var(--font-weight-w480);
  line-height: 1.35;
  letter-spacing: var(--tracking-heading-sm);
  color: var(--color-ivory-text);
  max-width: 42ch;
}

.slide__person {
  display: flex;
  align-items: center;
  gap: var(--spacing-16);
  margin-top: auto;
}

.slide__avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-image: url("../../img/Background.png");
  background-size: 900%;
  background-position: center;
  flex: none;
  filter: saturate(0.7);
}

.slide__name {
  font-size: var(--text-body);
  font-weight: var(--font-weight-w480);
  color: var(--color-ivory-text);
  line-height: 1.2;
}

.slide__role {
  font-size: var(--text-body-sm);
  color: var(--color-ash-text);
  line-height: 1.4;
}

.carousel__controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-24);
  margin-top: var(--spacing-24);
}

.carousel__dots {
  display: flex;
  gap: var(--spacing-8);
}

.carousel__dot {
  width: 28px;
  height: 3px;
  border-radius: 2px;
  background-color: rgba(var(--ivory-rgb), 0.22);
  transition: background-color 300ms ease, width 300ms ease;
}

.carousel__dot.is-active {
  background-color: var(--color-ivory-text);
  width: 44px;
}

.carousel__arrows {
  display: flex;
  gap: var(--spacing-8);
}

.carousel__arrow {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(var(--mist-rgb), 0.22);
  color: var(--color-ivory-text);
  transition: background-color 240ms ease, color 240ms ease, border-color 240ms ease;
}

.carousel__arrow:hover {
  background-color: var(--color-ivory-text);
  border-color: var(--color-ivory-text);
  color: var(--color-onyx-canvas);
}

.carousel__arrow:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.carousel__arrow svg {
  width: 16px;
  height: 16px;
}

/* --------------------------------------------------------------------------
   14. CTA band
   -------------------------------------------------------------------------- */
.cta {
  position: relative;
  border-radius: var(--radius-cards);
  overflow: hidden;
  padding: var(--spacing-112) var(--spacing-56);
  text-align: center;
  isolation: isolate;
}

.cta__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image: url("../../img/Background.png");
  background-size: cover;
  background-position: center 30%;
}

.cta__scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(var(--canvas-rgb), 0.82) 0%, rgba(var(--canvas-rgb), 0.94) 100%),
    radial-gradient(70% 100% at 50% 0%, rgba(var(--color-accent-amber-rgb), 0.16) 0%, rgba(var(--canvas-rgb), 0) 70%);
}

.cta__inner {
  max-width: 620px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-24);
}

.cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-12);
  justify-content: center;
}

/* --------------------------------------------------------------------------
   15. FAQ accordion
   -------------------------------------------------------------------------- */
.faq {
  border-top: 1px solid rgba(var(--mist-rgb), 0.1);
}

.faq__item {
  border-bottom: 1px solid rgba(var(--mist-rgb), 0.1);
}

.faq__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-24);
  padding: var(--spacing-24) 0;
  text-align: left;
  font-family: var(--font-arcadiadisplay);
  font-size: var(--text-subheading);
  font-weight: var(--font-weight-w480);
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--color-ivory-text);
  transition: color 220ms ease;
}

.faq__trigger:hover {
  color: var(--color-pure-white);
}

.faq__icon {
  position: relative;
  width: 16px;
  height: 16px;
  flex: none;
}

.faq__icon::before,
.faq__icon::after {
  content: "";
  position: absolute;
  inset: 50% 0 auto 0;
  height: 1.5px;
  background-color: currentColor;
  transform-origin: center;
  transition: transform 360ms cubic-bezier(0.22, 1, 0.36, 1);
}

.faq__icon::after {
  transform: rotate(90deg);
}

.faq__item.is-open .faq__icon::after {
  transform: rotate(0deg);
}

.faq__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 420ms cubic-bezier(0.22, 1, 0.36, 1);
}

.faq__item.is-open .faq__panel {
  grid-template-rows: 1fr;
}

.faq__panel > div {
  overflow: hidden;
}

.faq__panel p {
  padding-bottom: var(--spacing-24);
  max-width: 68ch;
  color: var(--color-ash-text);
  font-size: var(--text-body);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   16. Footer
   -------------------------------------------------------------------------- */
.footer {
  padding-block: var(--spacing-72) var(--spacing-40);
  border-top: 1px solid rgba(var(--mist-rgb), 0.1);
  background-color: var(--color-footer);
}

.footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
  gap: var(--spacing-40);
}

.footer__about {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-16);
  max-width: 320px;
}

.footer__about p {
  font-size: var(--text-body-sm);
  line-height: 1.6;
  color: var(--color-ash-text);
}

.footer__col h4 {
  font-size: var(--text-caption);
  font-weight: var(--font-weight-w480);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ash-text);
  margin-bottom: var(--spacing-16);
}

.footer__col li + li {
  margin-top: var(--spacing-12);
}

.footer__col a {
  font-size: var(--text-body-sm);
  color: var(--color-ivory-text);
  transition: color 200ms ease, padding-left 240ms cubic-bezier(0.22, 1, 0.36, 1);
  display: inline-block;
}

.footer__col a:hover {
  color: var(--color-pure-white);
  padding-left: 4px;
}

.disclaimer {
  margin-top: var(--spacing-56);
  padding-top: var(--spacing-24);
  border-top: 1px solid rgba(var(--mist-rgb), 0.1);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-16);
}

.disclaimer p {
  font-size: var(--text-caption);
  font-weight: var(--font-weight-w480);
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--color-ash-text);
  max-width: 96ch;
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-24);
  flex-wrap: wrap;
}

.footer__legal {
  display: flex;
  gap: var(--spacing-24);
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   17. Back to top
   -------------------------------------------------------------------------- */
.to-top {
  position: fixed;
  right: var(--spacing-24);
  bottom: var(--spacing-24);
  z-index: 90;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background-color: var(--color-obsidian-button);
  color: var(--color-ivory-text);
  border: 1px solid rgba(var(--mist-rgb), 0.14);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition:
    opacity 320ms ease,
    transform 380ms cubic-bezier(0.22, 1, 0.36, 1),
    visibility 320ms ease,
    background-color 240ms ease;
}

.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover {
  background-color: var(--color-ivory-text);
  color: var(--color-onyx-canvas);
}

/* --------------------------------------------------------------------------
   18. Scroll reveal
   -------------------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 820ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 820ms cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

[data-reveal="fade"] {
  transform: none;
}

[data-reveal="left"] {
  transform: translateX(-26px);
}

[data-reveal="right"] {
  transform: translateX(26px);
}

[data-reveal="scale"] {
  transform: scale(0.97);
}

/* Reading progress bar */
.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 100%;
  z-index: 101;
  transform: scaleX(0);
  transform-origin: left center;
  background-color: var(--color-accent-amber);
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   18b. Views (hash routing between preview pages)
   -------------------------------------------------------------------------- */
.view {
  display: none;
}

.view.is-active {
  display: block;
  animation: view-in 620ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.view.is-leaving {
  animation: view-out 220ms ease both;
}

@keyframes view-in {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes view-out {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
    transform: translateY(-8px);
  }
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: var(--radius-buttons);
  background-color: var(--color-accent);
  color: var(--color-accent-fg);
  transform: translateY(-200%);
  transition: transform 220ms ease;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

/* `hidden` must always win over component display values */
[hidden] {
  display: none !important;
}

/* --------------------------------------------------------------------------
   18c. Toast
   -------------------------------------------------------------------------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: var(--spacing-32);
  z-index: 120;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-12);
  max-width: min(440px, calc(100vw - 40px));
  padding: 14px var(--spacing-20);
  border-radius: var(--radius-buttons);
  background-color: rgba(var(--obsidian-rgb), 0.94);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(var(--mist-rgb), 0.14);
  color: var(--color-ivory-text);
  font-size: var(--text-body-sm);
  line-height: 1.4;
  transform: translate(-50%, 16px);
  opacity: 0;
  transition: opacity 300ms ease, transform 380ms cubic-bezier(0.22, 1, 0.36, 1);
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.toast .toast__dot {
  width: 7px;
  height: 7px;
  flex: none;
  border-radius: 50%;
  background-color: var(--color-accent-amber);
}

/* --------------------------------------------------------------------------
   19. Responsive
   断点策略:1080 收窄网格 → 900 切换到抽屉导航 → 720 手机版式重排
   → 420 小屏微调 → 360 极窄屏。字号由 clamp() 在基类里连续缩放,
   断点只负责改版式,不再重复声明字号。
   -------------------------------------------------------------------------- */

/* --- 平板:三栏收成两栏 --- */
@media (max-width: 1080px) {
  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer__top {
    grid-template-columns: minmax(0, 1fr) repeat(2, minmax(0, 1fr));
  }

  .footer__about {
    grid-column: 1 / -1;
    max-width: 520px;
  }
}

/* --- 竖屏平板 / 大屏手机:导航切抽屉,分栏堆叠 --- */
@media (max-width: 900px) {
  .nav__menu,
  .nav__login {
    display: none;
  }

  .nav__toggle {
    display: grid;
  }

  .nav__inner {
    justify-content: space-between;
    gap: var(--spacing-16);
  }

  .split {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--spacing-40);
  }

  .split--reverse .split__media {
    order: 0;
  }

  /* 单列后媒体不再需要撑高,交给内容决定,避免大片空白 */
  .split__media .media-frame {
    position: relative;
    min-height: 0 !important;
    aspect-ratio: 4 / 3;
  }

  .split__media .media-frame .img {
    position: absolute;
    inset: 0;
  }

  .slide {
    padding: var(--spacing-40) var(--spacing-32);
  }
}

/* --- 手机:重新排布,而不是等比缩小 --- */
@media (max-width: 720px) {
  :root {
    /* 收窄令牌,让所有引用它们的组件一起变紧凑 */
    --card-padding: 22px;
    --section-gap: 56px;
    --text-body-lg: 16px;
    --leading-body-lg: 1.65;
  }

  .container {
    padding-inline: var(--spacing-20);
  }

  .section {
    padding-block: var(--section-gap);
  }

  .section__head {
    margin-bottom: var(--spacing-32);
  }

  .grid--2,
  .grid--3,
  .stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .grid {
    gap: var(--spacing-16);
  }

  /* ---------- 首屏 ---------- */
  .hero {
    /* 76px 固定导航 + 呼吸空间,原来 132px 顶部留白在手机上过分空旷 */
    padding: 104px var(--spacing-20) var(--spacing-56);
    min-height: auto;
  }

  .hero__inner {
    gap: var(--spacing-24);
  }

  .hero__badge {
    padding: 6px var(--spacing-12);
    letter-spacing: 0.06em;
  }

  .hero__sub {
    max-width: 32em;
  }

  .hero__form {
    max-width: 100%;
  }

  /* 输入框与按钮改为上下堆叠并居中:左对齐在窄屏上会显得偏斜 */
  .hero__field {
    flex-direction: column;
    gap: var(--spacing-12);
  }

  .hero__input {
    border: 1px solid var(--color-ivory-text);
    border-radius: var(--radius-inputs);
    text-align: center;
    padding-block: 14px;
  }

  .hero__submit {
    border-radius: var(--radius-inputs);
    width: 100%;
    padding-block: 16px;
  }

  .hero__note {
    font-size: 11.5px;
    max-width: 34em;
  }

  /* 滚动提示在手机上多数时候被地址栏遮挡,直接隐藏 */
  .hero__scroll {
    display: none;
  }

  /* ---------- 品牌滚动条 ---------- */
  .marquee__track {
    gap: var(--spacing-32);
  }

  .marquee__zh {
    font-size: 17px;
  }

  .marquee__en {
    font-size: 12px;
  }

  /* ---------- 数据条 ---------- */
  .stat {
    padding: var(--spacing-24);
    flex-direction: row;
    align-items: baseline;
    gap: var(--spacing-12);
  }

  .stat__value {
    font-size: 30px;
    flex: none;
    min-width: 84px;
  }

  .stat__label {
    font-size: var(--text-body-sm);
  }

  /* ---------- 卡片 ---------- */
  .card--feature .card__media {
    height: 168px;
  }

  .card__meta {
    flex-wrap: wrap;
    gap: var(--spacing-12);
  }

  /* ---------- 工单示意面板:窄屏上左右两列会挤成一团,改上下排 ---------- */
  .mock {
    padding: var(--spacing-16);
    gap: var(--spacing-12);
  }

  .mock__panel {
    padding: var(--spacing-16);
    gap: var(--spacing-8);
  }

  .mock__row {
    display: block;
    font-size: var(--text-caption);
    line-height: 1.6;
  }

  .mock__row > .mock__amount,
  .mock__row > .mock__badge {
    display: block;
    margin-top: 2px;
  }

  /* ---------- 选项卡:横向滚动 + 吸附,并给出可滑动的视觉暗示 ---------- */
  .tabs {
    width: 100%;
    margin-inline: calc(var(--spacing-20) * -1);
    padding: var(--spacing-4) var(--spacing-20);
    border-radius: 0;
    /* 去掉容器底色后,胶囊变成独立的个体,需要更大的间隔才不显拥挤 */
    background-color: transparent;
    gap: var(--spacing-8);
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
  }

  .tab {
    scroll-snap-align: start;
    background-color: var(--color-graphite-card);
  }

  .tab.is-active {
    background-color: var(--color-obsidian-button);
  }

  /* ---------- 客户评价 ---------- */
  .slide {
    padding: var(--spacing-32) var(--spacing-24);
    gap: var(--spacing-24);
  }

  .slide__quote {
    font-size: 19px;
  }

  .carousel__controls {
    flex-direction: column-reverse;
    align-items: stretch;
    gap: var(--spacing-16);
  }

  .carousel__arrows {
    justify-content: flex-end;
  }

  .carousel__arrow {
    width: 46px;
    height: 46px;
  }

  /* ---------- CTA ---------- */
  .cta {
    padding: var(--spacing-56) var(--spacing-24);
  }

  .cta__actions {
    width: 100%;
    flex-direction: column;
  }

  .cta__actions .btn {
    width: 100%;
  }

  /* ---------- FAQ ---------- */
  .faq__trigger {
    padding: var(--spacing-20) 0;
    font-size: var(--text-body-lg);
    gap: var(--spacing-16);
  }

  /* ---------- 页脚 ---------- */
  .footer {
    padding-block: var(--spacing-56) var(--spacing-32);
  }

  .footer__top {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--spacing-32);
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-12);
  }

  /* ---------- 表单页:内联 padding 会盖过令牌,这里显式收回 ---------- */
  .view .card[style*="padding:40px"] {
    padding: var(--spacing-24) !important;
  }

  /* ---------- 移动端内页:统一顶部留白 ---------- */
  .view > section[style*="padding-top:180px"] {
    padding-top: 120px !important;
  }

  /* ---------- 回到顶部:避开 iOS 底部安全区 ---------- */
  .to-top {
    right: var(--spacing-16);
    bottom: calc(var(--spacing-16) + env(safe-area-inset-bottom, 0px));
  }

  .toast {
    bottom: calc(var(--spacing-16) + env(safe-area-inset-bottom, 0px));
  }

  /* 触控目标不小于 44px */
  .nav__link {
    padding-block: 12px;
  }

  .faq__icon {
    width: 18px;
    height: 18px;
  }
}

/* --- 小屏手机(≤420px):压缩留白与卡片内边距 --- */
@media (max-width: 420px) {
  :root {
    --card-padding: 20px;
    --section-gap: 48px;
  }

  .container {
    padding-inline: var(--spacing-16);
  }

  .hero {
    padding-inline: var(--spacing-16);
    padding-top: 96px;
  }

  .brand__word {
    font-size: 18px;
  }

  .nav__item,
  .nav__toggle {
    flex: none;
  }

  .marquee__track {
    gap: var(--spacing-24);
  }

  .marquee__zh {
    font-size: 16px;
  }

  .stat {
    flex-direction: column;
    gap: var(--spacing-4);
  }

  .stat__value {
    min-width: 0;
    font-size: 27px;
  }

  .slide__quote {
    font-size: 17px;
  }

  .cta {
    padding: var(--spacing-40) var(--spacing-16);
  }

  .footer__legal {
    gap: var(--spacing-16);
  }
}

/* --- 极窄屏(≤360px,如折叠屏外屏)--- */
@media (max-width: 360px) {
  :root {
    --card-padding: 18px;
  }

  .hero__badge {
    font-size: 11px;
  }

  .btn {
    padding-inline: var(--spacing-16);
  }

  .hero__submit,
  .cta__actions .btn {
    padding-inline: var(--spacing-12);
  }
}

/* --- 横屏矮屏:首屏不能占满整个视口,否则要滚动才能看到内容 --- */
@media (max-height: 520px) and (orientation: landscape) {
  .hero {
    min-height: auto;
    padding-block: 96px var(--spacing-40);
  }

  .hero__inner {
    gap: var(--spacing-16);
  }

  .hero__note,
  .hero__scroll {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   20. Reduced motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  [data-reveal],
  .hero__reveal,
  .hero__title .line > span {
    opacity: 1 !important;
    transform: none !important;
  }

  .marquee__track {
    animation: none;
  }
}

/* --------------------------------------------------------------------------
   移植补充(由 tools/port-prototype-css.js 追加,请勿手工编辑 site.css)
   --------------------------------------------------------------------------
   原型把迷你折线图的描边颜色写在 SVG 标签属性上,样式表里没有这条规则;
   模板改用 stroke="currentColor" 之后,必须有地方把颜色给出来。
   -------------------------------------------------------------------------- */
.mock__spark path {
  stroke: var(--color-accent-amber);
}

/* --------------------------------------------------------------------------
   顶部菜单:一行放不下时折行的问题(第 12 期批 8)

   中文菜单每项两三个字,英文是 "Machine types" / "Track order" / "Care plans",
   同一排明显更长。原型的 .nav__menu 是 flex、.nav__item 没禁止收缩,于是
   窗口一窄,菜单项被压窄、文字折成两行 —— 页头高度跟着变,整块布局错位。

   这里只做三件事,不改任何颜色、间距体系与结构:
     1. 菜单项不折行、不被压窄;
     2. 英文时把字号与左右内边距收一点,让一整排进得去;
     3. 英文在更窄的屏上提前收进抽屉(汉堡菜单),而不是挤成一团。
   -------------------------------------------------------------------------- */
.nav__menu {
  flex-wrap: nowrap;
}

.nav__item {
  flex: none;
}

.nav__link,
.nav__login {
  white-space: nowrap;
}

html[lang="en"] .nav__inner {
  gap: var(--spacing-16);
}

html[lang="en"] .nav__link {
  padding-inline: var(--spacing-12);
  font-size: 13.5px;
  letter-spacing: -0.005em;
}

html[lang="en"] .nav__login {
  font-size: 13.5px;
}

html[lang="en"] .nav__cta {
  padding-inline: var(--spacing-16);
}

@media (max-width: 1080px) {
  html[lang="en"] .nav__menu,
  html[lang="en"] .nav__login {
    display: none;
  }

  html[lang="en"] .nav__toggle {
    display: grid;
  }
}