/* ==========================================================================
   深野数字 DEEPWILD — 设计系统与全站样式
   基调：深炭黑底 + 琥珀金 + 青绿 + 陶土点缀（暗色大地色系）
   ========================================================================== */

/* ----------------------------- 1. 变量 ----------------------------- */
:root {
  /* 底色阶梯 */
  --ink-950: #06070a;
  --ink-900: #0a0c10;
  --ink-850: #0e1117;
  --ink-800: #13171e;
  --ink-750: #181d25;
  --ink-700: #1e242d;

  /* 描边 */
  --line: rgba(255, 255, 255, 0.07);
  --line-2: rgba(255, 255, 255, 0.12);
  --line-3: rgba(255, 255, 255, 0.2);

  /* 文字 */
  --text: #ece8e1;
  --text-2: #a5a099;
  --text-3: #6f6b64;

  /* 强调色 */
  --amber: #e0a458;
  --amber-2: #f2c98c;
  --amber-dim: rgba(224, 164, 88, 0.14);
  --clay: #c67b5c;
  --teal: #5fa69e;
  --moss: #8ba46e;

  /* 排版 */
  --font-sans: "Space Grotesk", "Inter", -apple-system, BlinkMacSystemFont,
    "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  /* 尺寸 */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-xl: 32px;
  --nav-h: 74px;

  /* 缓动 */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

/* ----------------------------- 2. 重置 ----------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 24px);
}

body {
  background: var(--ink-950);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* 全局噪点纹理：让暗色不死板 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

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

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: 0;
  cursor: pointer;
}

ul,
ol {
  list-style: none;
}

::selection {
  background: var(--amber);
  color: var(--ink-950);
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--ink-950);
}
::-webkit-scrollbar-thumb {
  background: var(--ink-700);
  border-radius: 9px;
  border: 2px solid var(--ink-950);
}
::-webkit-scrollbar-thumb:hover {
  background: #2b333d;
}

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ----------------------------- 3. 排版 ----------------------------- */
h1,
h2,
h3,
h4,
h5 {
  line-height: 1.14;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #fff;
}

.h-display {
  font-size: clamp(2.6rem, 7.4vw, 5.6rem);
  line-height: 0.98;
  letter-spacing: -0.045em;
  font-weight: 600;
}

.h1 {
  font-size: clamp(2.1rem, 4.8vw, 3.5rem);
  letter-spacing: -0.035em;
}

.h2 {
  font-size: clamp(1.75rem, 3.6vw, 2.75rem);
  letter-spacing: -0.03em;
}

.h3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
}

.h4 {
  font-size: 1.075rem;
  letter-spacing: -0.01em;
}

.lead {
  font-size: clamp(1.02rem, 1.35vw, 1.2rem);
  color: var(--text-2);
  line-height: 1.8;
  max-width: 62ch;
}

.muted {
  color: var(--text-2);
}
.dim {
  color: var(--text-3);
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* 描边字：暗色系里的高光手法 */
.outline-text {
  color: transparent;
  -webkit-text-stroke: 1px var(--line-3);
}

.accent {
  color: var(--amber);
}

.underline-accent {
  background-image: linear-gradient(var(--amber), var(--amber));
  background-repeat: no-repeat;
  background-size: 0% 2px;
  background-position: 0 100%;
  transition: background-size 0.45s var(--ease);
  padding-bottom: 2px;
}
.underline-accent:hover {
  background-size: 100% 2px;
}

/* 章节标签 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--amber);
  opacity: 0.7;
}

/* ----------------------------- 4. 布局 ----------------------------- */
.wrap {
  width: min(1240px, 91vw);
  margin-inline: auto;
}

.wrap-wide {
  width: min(1520px, 95vw);
  margin-inline: auto;
}

.wrap-narrow {
  width: min(880px, 91vw);
  margin-inline: auto;
}

.section {
  position: relative;
  padding: clamp(72px, 10vw, 148px) 0;
}

.section--tight {
  padding: clamp(52px, 6vw, 84px) 0;
}

.section--alt {
  background: var(--ink-900);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.grid {
  display: grid;
  gap: clamp(18px, 2.2vw, 30px);
}

.g-2 {
  grid-template-columns: repeat(2, 1fr);
}
.g-3 {
  grid-template-columns: repeat(3, 1fr);
}
.g-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* 非对称主从布局：主 1.618 倍 */
.g-split {
  grid-template-columns: 1.618fr 1fr;
  align-items: start;
}
.g-split-rev {
  grid-template-columns: 1fr 1.618fr;
  align-items: start;
}

/* 图文横向并排（移动端自动折叠为上下） */
.g-feature {
  grid-template-columns: 1.2fr 1fr;
  align-items: stretch;
  gap: 0;
}

.stack {
  display: flex;
  flex-direction: column;
}
.stack-sm {
  gap: 8px;
}
.stack-md {
  gap: 18px;
}
.stack-lg {
  gap: 30px;
}

.row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* 章节头（不对称：左标题右说明） */
.sec-head {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: clamp(20px, 4vw, 64px);
  align-items: end;
  margin-bottom: clamp(40px, 5vw, 68px);
}

.sec-head__aside {
  color: var(--text-2);
  font-size: 0.98rem;
  padding-bottom: 6px;
}

.sec-head .h2 {
  margin-top: 18px;
}

/* 分割线 */
.hr {
  height: 1px;
  background: var(--line);
  border: 0;
}

/* ----------------------------- 5. 按钮 ----------------------------- */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--text);
  --btn-bd: var(--line-2);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border-radius: 999px;
  border: 1px solid var(--btn-bd);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: 0.94rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  position: relative;
  isolation: isolate;
  overflow: hidden;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease),
    color 0.3s var(--ease), box-shadow 0.3s var(--ease);
  white-space: nowrap;
}

.btn svg {
  width: 17px;
  height: 17px;
  transition: transform 0.35s var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
}
.btn:hover svg {
  transform: translateX(3px);
}

.btn--solid {
  --btn-bg: var(--amber);
  --btn-fg: #14100a;
  --btn-bd: var(--amber);
  font-weight: 600;
}
.btn--solid:hover {
  box-shadow: 0 10px 34px rgba(224, 164, 88, 0.28);
  --btn-bg: var(--amber-2);
  --btn-bd: var(--amber-2);
}

.btn--ghost {
  --btn-bd: var(--line-2);
}
.btn--ghost:hover {
  --btn-bd: var(--line-3);
  background: rgba(255, 255, 255, 0.04);
}

.btn--light {
  --btn-bg: var(--text);
  --btn-fg: var(--ink-950);
  --btn-bd: var(--text);
  font-weight: 600;
}
.btn--light:hover {
  --btn-bg: #fff;
  --btn-bd: #fff;
}

.btn--sm {
  padding: 9px 18px;
  font-size: 0.85rem;
}

.btn--lg {
  padding: 17px 34px;
  font-size: 1rem;
}

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

/* 文字箭头链接 */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--amber);
  font-size: 0.92rem;
  font-weight: 500;
}
.link-arrow svg {
  width: 16px;
  height: 16px;
  transition: transform 0.35s var(--ease);
}
.link-arrow:hover svg {
  transform: translateX(5px);
}

/* ----------------------------- 6. 导航 ----------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: height 0.35s var(--ease), background 0.35s var(--ease),
    backdrop-filter 0.35s var(--ease), border-color 0.35s var(--ease);
  border-bottom: 1px solid transparent;
}

.nav.is-stuck {
  height: 62px;
  background: rgba(10, 12, 16, 0.82);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border-bottom-color: var(--line);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(1520px, 95vw);
  margin-inline: auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex-shrink: 0;
}

.brand__mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: linear-gradient(145deg, var(--amber), var(--clay));
  color: #17120a;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.04em;
  box-shadow: 0 6px 20px rgba(224, 164, 88, 0.22);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
  font-weight: 600;
  letter-spacing: 0.02em;
  font-size: 0.98rem;
}

.brand__text em {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.56rem;
  letter-spacing: 0.26em;
  color: var(--text-3);
  font-weight: 400;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav__menu > li > a {
  display: block;
  padding: 9px 15px;
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--text-2);
  transition: color 0.25s var(--ease), background 0.25s var(--ease);
}

.nav__menu > li > a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.nav__menu > li > a.is-active {
  color: var(--amber);
  background: var(--amber-dim);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nav__phone {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--text-2);
  transition: color 0.25s var(--ease);
}
.nav__phone:hover {
  color: var(--amber);
}

/* 汉堡 */
.burger {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--line-2);
  position: relative;
  flex-shrink: 0;
}

.burger span {
  position: absolute;
  left: 12px;
  width: 17px;
  height: 1.6px;
  background: var(--text);
  transition: transform 0.35s var(--ease), opacity 0.25s var(--ease);
}
.burger span:nth-child(1) {
  top: 15px;
}
.burger span:nth-child(2) {
  top: 21px;
}
.burger span:nth-child(3) {
  top: 27px;
}

.burger.is-open span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.burger.is-open span:nth-child(2) {
  opacity: 0;
}
.burger.is-open span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* 移动端抽屉 */
.drawer {
  position: fixed;
  inset: 0;
  z-index: 890;
  background: var(--ink-950);
  padding: calc(var(--nav-h) + 22px) 6vw 40px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity 0.35s var(--ease), transform 0.45s var(--ease),
    visibility 0.35s;
}

.drawer.is-open {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.drawer a.drawer__link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  transition: color 0.25s var(--ease), padding-left 0.35s var(--ease);
}

.drawer a.drawer__link:hover,
.drawer a.drawer__link.is-active {
  color: var(--amber);
  padding-left: 8px;
}

.drawer a.drawer__link i {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  color: var(--text-3);
}

body.is-locked {
  overflow: hidden;
}

/* 滚动进度条 */
.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  z-index: 999;
  background: linear-gradient(90deg, var(--clay), var(--amber), var(--amber-2));
  transition: width 0.1s linear;
}

/* ----------------------------- 7. Hero ----------------------------- */
.hero {
  position: relative;
  padding: calc(var(--nav-h) + clamp(56px, 9vw, 110px)) 0 clamp(56px, 8vw, 96px);
  overflow: hidden;
}

/* 背景：径向光晕 + 网格线 */
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.hero__bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
      58% 46% at 16% 8%,
      rgba(224, 164, 88, 0.13),
      transparent 62%
    ),
    radial-gradient(46% 40% at 88% 24%, rgba(95, 166, 158, 0.11), transparent 64%),
    radial-gradient(70% 52% at 50% 108%, rgba(198, 123, 92, 0.1), transparent 68%);
}

.hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 76px 76px;
  mask-image: radial-gradient(ellipse 78% 62% at 50% 34%, #000 12%, transparent 76%);
  -webkit-mask-image: radial-gradient(
    ellipse 78% 62% at 50% 34%,
    #000 12%,
    transparent 76%
  );
  opacity: 0.85;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.55fr 1fr;
  gap: clamp(30px, 5vw, 72px);
  align-items: end;
}

.hero__title {
  margin: 22px 0 0;
}

.hero__title .line {
  display: block;
}

/* 高亮胶囊 */
.hero__title .pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.42em;
  font-weight: 500;
  letter-spacing: 0.01em;
  padding: 6px 18px 8px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  background: rgba(255, 255, 255, 0.035);
  color: var(--text-2);
  vertical-align: middle;
  transform: translateY(-0.22em);
  margin-left: 0.16em;
}

.hero__title .pill b {
  color: var(--amber);
  font-weight: 600;
}

.hero__sub {
  margin-top: 26px;
  max-width: 46ch;
}

.hero__cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 34px;
}

.hero__meta {
  border-left: 1px solid var(--line-2);
  padding-left: clamp(18px, 2.4vw, 32px);
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.hero__meta-item strong {
  display: block;
  font-size: clamp(1.7rem, 3.1vw, 2.35rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  color: #fff;
  line-height: 1;
}

.hero__meta-item strong sup {
  color: var(--amber);
  font-size: 0.5em;
  vertical-align: super;
}

.hero__meta-item span {
  display: block;
  margin-top: 5px;
  font-size: 0.82rem;
  color: var(--text-3);
  letter-spacing: 0.03em;
}

/* 信任条 */
.trust {
  margin-top: clamp(44px, 6vw, 76px);
  padding-top: 26px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: clamp(20px, 4vw, 46px);
  flex-wrap: wrap;
}

.trust__label {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  color: var(--text-3);
  text-transform: uppercase;
}

.trust__items {
  display: flex;
  gap: clamp(20px, 4vw, 48px);
  flex-wrap: wrap;
  align-items: center;
}

.trust__items span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: 0.03em;
  transition: color 0.3s var(--ease);
  white-space: nowrap;
}

.trust__items span:hover {
  color: var(--text);
}

/* ----------------------------- 8. 跑马灯 ----------------------------- */
.marquee {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--ink-900);
  overflow: hidden;
  padding: 22px 0;
  display: flex;
  user-select: none;
  mask-image: linear-gradient(
    90deg,
    transparent,
    #000 8%,
    #000 92%,
    transparent
  );
  -webkit-mask-image: linear-gradient(
    90deg,
    transparent,
    #000 8%,
    #000 92%,
    transparent
  );
}

.marquee__track {
  display: flex;
  align-items: center;
  gap: 46px;
  padding-right: 46px;
  animation: marquee 38s linear infinite;
  flex-shrink: 0;
}

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

.marquee__track span {
  font-size: clamp(1.05rem, 2.1vw, 1.65rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text-3);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 46px;
}

.marquee__track span::after {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber);
  opacity: 0.55;
  flex-shrink: 0;
}

.marquee__track span:nth-child(3n) {
  color: var(--amber);
  opacity: 0.75;
}

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

/* ----------------------------- 9. 卡片 ----------------------------- */
.card {
  position: relative;
  background: var(--ink-850);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(22px, 2.6vw, 32px);
  transition: transform 0.5s var(--ease), border-color 0.4s var(--ease),
    background 0.4s var(--ease);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-5px);
  border-color: var(--line-3);
  background: var(--ink-800);
}

/* 悬停时的琥珀光晕 */
.card::after {
  content: "";
  position: absolute;
  width: 220px;
  height: 220px;
  top: -110px;
  right: -110px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(224, 164, 88, 0.16), transparent 68%);
  opacity: 0;
  transition: opacity 0.5s var(--ease);
  pointer-events: none;
}
.card:hover::after {
  opacity: 1;
}

.card__num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--text-3);
}

.card__icon {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-2);
  background: rgba(255, 255, 255, 0.03);
  color: var(--amber);
  margin-bottom: 22px;
  flex-shrink: 0;
}

.card__icon svg {
  width: 21px;
  height: 21px;
}

.card h3 {
  margin-bottom: 10px;
}

.card p {
  color: var(--text-2);
  font-size: 0.94rem;
  line-height: 1.78;
}

.card__foot {
  margin-top: auto;
  padding-top: 22px;
}

/* 卡片内标签 */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 18px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--text-3);
  text-transform: uppercase;
  white-space: nowrap;
}

/* ----------------------------- 10. Bento 非对称网格 ----------------------------- */
.bento {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: clamp(14px, 1.6vw, 22px);
}

.bento > *:nth-child(1) {
  grid-column: span 4;
}
.bento > *:nth-child(2) {
  grid-column: span 2;
}
.bento > *:nth-child(3) {
  grid-column: span 2;
}
.bento > *:nth-child(4) {
  grid-column: span 4;
}

/* 大卡片变体 */
.card--hero {
  background: linear-gradient(150deg, var(--ink-800), var(--ink-900) 78%);
  border-color: var(--line-2);
}

.card--hero h3 {
  font-size: clamp(1.3rem, 2.2vw, 1.85rem);
}

.card--amber {
  background: linear-gradient(145deg, rgba(224, 164, 88, 0.14), var(--ink-850) 62%);
  border-color: rgba(224, 164, 88, 0.24);
}

.card--teal {
  background: linear-gradient(145deg, rgba(95, 166, 158, 0.13), var(--ink-850) 62%);
  border-color: rgba(95, 166, 158, 0.22);
}

/* 数据列表卡 */
.metric-list {
  display: grid;
  gap: 16px;
  margin-top: 22px;
}

.metric-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--text-2);
}

.metric-list li svg {
  width: 17px;
  height: 17px;
  color: var(--teal);
  flex-shrink: 0;
  margin-top: 5px;
}

/* ----------------------------- 11. 统计条 ----------------------------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-850);
}

/* 三列紧凑变体：用于章节内部的局部数据展示 */
.stats--compact {
  grid-template-columns: repeat(3, 1fr);
  border-radius: var(--r-md);
}

.stat {
  padding: clamp(24px, 3vw, 40px) clamp(18px, 2.2vw, 30px);
  border-right: 1px solid var(--line);
  transition: background 0.4s var(--ease);
}

.stat:last-child {
  border-right: 0;
}

.stat:hover {
  background: rgba(255, 255, 255, 0.03);
}

.stat__num {
  display: flex;
  align-items: baseline;
  gap: 3px;
  font-size: clamp(2rem, 4.2vw, 3.2rem);
  font-weight: 600;
  letter-spacing: -0.05em;
  line-height: 1;
  color: #fff;
  font-variant-numeric: tabular-nums;
}

.stat__num sup {
  font-size: 0.42em;
  color: var(--amber);
  font-weight: 500;
}

.stat__label {
  margin-top: 10px;
  font-size: 0.86rem;
  color: var(--text-3);
}

/* ----------------------------- 12. 案例 ----------------------------- */
.case {
  position: relative;
  display: block;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-850);
  transition: transform 0.55s var(--ease), border-color 0.4s var(--ease);
}

.case:hover {
  transform: translateY(-6px);
  border-color: var(--line-3);
}

.case__media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(140deg, var(--ink-750), var(--ink-900));
}

.case__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.55) contrast(1.06) brightness(0.72);
  transition: transform 0.8s var(--ease), filter 0.6s var(--ease);
}

.case:hover .case__media img {
  transform: scale(1.055);
  filter: grayscale(0.1) contrast(1.02) brightness(0.86);
}

/* 图片上方的色彩叠加，统一暗色调 */
.case__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(6, 7, 10, 0.1) 0%,
    rgba(6, 7, 10, 0.62) 62%,
    rgba(6, 7, 10, 0.94) 100%
  );
  pointer-events: none;
}

.case__body {
  padding: clamp(20px, 2.4vw, 28px);
}

.case__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 12px;
}

.case__cat {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

.case__year {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  color: var(--text-3);
}

.case h3 {
  font-size: 1.22rem;
  margin-bottom: 8px;
}

.case p {
  color: var(--text-2);
  font-size: 0.9rem;
  line-height: 1.75;
}

.case__stats {
  display: flex;
  gap: 22px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  flex-wrap: wrap;
}

.case__stats div strong {
  display: block;
  font-size: 1.1rem;
  color: var(--amber);
  letter-spacing: -0.02em;
}

.case__stats div span {
  font-size: 0.76rem;
  color: var(--text-3);
}

/* 详情页的上一条 / 下一条 */
.prevnext {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(14px, 2vw, 22px);
}

.prevnext a {
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-850);
  padding: clamp(20px, 2.4vw, 28px);
  transition: border-color 0.4s var(--ease), transform 0.5s var(--ease),
    background 0.4s var(--ease);
}

.prevnext a:hover {
  border-color: var(--line-3);
  background: var(--ink-800);
  transform: translateY(-4px);
}

.prevnext span {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-3);
}

.prevnext strong {
  display: block;
  margin-top: 10px;
  font-size: 1.02rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: -0.01em;
  transition: color 0.3s var(--ease);
}

.prevnext a:hover strong {
  color: var(--amber);
}

.prevnext a:last-child {
  text-align: right;
}

/* 客户原声（详情页内） */
.voice {
  border-left: 2px solid var(--amber);
  padding: 6px 0 6px 24px;
  margin: 30px 0;
}

.voice p {
  color: var(--text);
  font-size: 1.1rem;
  line-height: 1.75;
}

.voice cite {
  display: block;
  margin-top: 14px;
  font-style: normal;
  font-size: 0.86rem;
  color: var(--text-3);
}

/* 案例交替偏移布局 */
.offset-grid > *:nth-child(even) {
  transform: translateY(clamp(20px, 4vw, 58px));
}
.offset-grid > *:nth-child(even):hover {
  transform: translateY(clamp(14px, 3.4vw, 52px));
}

/* ----------------------------- 13. 流程时间轴 ----------------------------- */
.flow {
  display: grid;
  grid-template-columns: 0.9fr 1.6fr;
  gap: clamp(30px, 5vw, 76px);
  align-items: start;
}

.flow__sticky {
  position: sticky;
  top: calc(var(--nav-h) + 32px);
}

.flow__steps {
  display: flex;
  flex-direction: column;
}

.flow__step {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: clamp(14px, 2.4vw, 30px);
  padding: 30px 0;
  border-top: 1px solid var(--line);
  position: relative;
  transition: padding-left 0.45s var(--ease);
}

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

.flow__step:hover {
  padding-left: 12px;
}

.flow__step:hover .flow__idx {
  color: var(--amber);
}

.flow__step::before {
  content: "";
  position: absolute;
  left: 0;
  top: -1px;
  height: 1px;
  width: 0;
  background: var(--amber);
  transition: width 0.6s var(--ease);
}

.flow__step:hover::before {
  width: 100%;
}

.flow__idx {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--text-3);
  padding-top: 7px;
  transition: color 0.35s var(--ease);
}

.flow__body h3 {
  margin-bottom: 9px;
}

.flow__body p {
  color: var(--text-2);
  font-size: 0.94rem;
  max-width: 56ch;
}

.flow__body .tags {
  margin-top: 14px;
}

/* ----------------------------- 14. 报价 ----------------------------- */
.plans {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, 1.8vw, 24px);
  align-items: start;
}

.plan {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-850);
  padding: clamp(26px, 2.8vw, 36px);
  display: flex;
  flex-direction: column;
  transition: transform 0.5s var(--ease), border-color 0.4s var(--ease),
    background 0.4s var(--ease);
}

.plan:hover {
  transform: translateY(-6px);
  border-color: var(--line-3);
}

.plan--featured {
  background: linear-gradient(160deg, rgba(224, 164, 88, 0.12), var(--ink-850) 56%);
  border-color: rgba(224, 164, 88, 0.3);
  box-shadow: 0 26px 70px -30px rgba(224, 164, 88, 0.32);
}

.plan__badge {
  position: absolute;
  top: -12px;
  left: clamp(26px, 2.8vw, 36px);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  background: var(--amber);
  color: #14100a;
  padding: 5px 12px;
  border-radius: 999px;
  font-weight: 700;
}

.plan__name {
  font-size: 1.15rem;
  font-weight: 600;
  color: #fff;
}

.plan__desc {
  margin-top: 8px;
  font-size: 0.88rem;
  color: var(--text-3);
  min-height: 42px;
}

.plan__price {
  margin: 22px 0 6px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.plan__price b {
  font-size: clamp(2rem, 3.4vw, 2.7rem);
  font-weight: 600;
  letter-spacing: -0.05em;
  color: #fff;
  line-height: 1;
}

.plan__price i {
  font-style: normal;
  color: var(--text-3);
  font-size: 0.85rem;
}

.plan__note {
  font-size: 0.78rem;
  color: var(--text-3);
  margin-bottom: 24px;
}

.plan__features {
  display: grid;
  gap: 12px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
  margin-bottom: 26px;
}

.plan__features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-2);
  line-height: 1.6;
}

.plan__features li svg {
  width: 16px;
  height: 16px;
  color: var(--amber);
  flex-shrink: 0;
  margin-top: 5px;
}

.plan__features li.is-muted {
  color: var(--text-3);
}
.plan__features li.is-muted svg {
  color: var(--text-3);
}

.plan .btn {
  margin-top: auto;
}

/* ----------------------------- 15. 评价 ----------------------------- */
.quotes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, 1.8vw, 24px);
}

.quote {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-850);
  padding: clamp(24px, 2.6vw, 32px);
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: border-color 0.4s var(--ease), transform 0.5s var(--ease);
}

.quote:hover {
  border-color: var(--line-3);
  transform: translateY(-4px);
}

.quote__mark {
  font-size: 2.6rem;
  line-height: 1;
  color: var(--amber);
  opacity: 0.42;
  font-family: Georgia, serif;
}

.quote p {
  color: var(--text);
  font-size: 1rem;
  line-height: 1.8;
}

.quote__by {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 13px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  font-weight: 600;
  background: linear-gradient(140deg, var(--teal), var(--moss));
  color: #0b1113;
  flex-shrink: 0;
  letter-spacing: -0.02em;
}

.avatar--clay {
  background: linear-gradient(140deg, var(--clay), var(--amber));
  color: #17120a;
}

.quote__by strong {
  display: block;
  font-size: 0.92rem;
  font-weight: 600;
}

.quote__by span {
  font-size: 0.78rem;
  color: var(--text-3);
}

/* ----------------------------- 16. FAQ ----------------------------- */
.faq {
  border-top: 1px solid var(--line);
}

.faq__item {
  border-bottom: 1px solid var(--line);
}

.faq__q {
  width: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 0;
  text-align: left;
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  font-weight: 500;
  color: var(--text);
  transition: color 0.3s var(--ease);
}

.faq__q:hover {
  color: var(--amber);
}

.faq__sign {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--line-2);
  position: relative;
  flex-shrink: 0;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease),
    transform 0.5s var(--ease);
}

.faq__sign::before,
.faq__sign::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: currentColor;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s var(--ease);
}

.faq__sign::before {
  width: 12px;
  height: 1.4px;
}
.faq__sign::after {
  width: 1.4px;
  height: 12px;
}

.faq__item.is-open .faq__sign {
  background: var(--amber);
  border-color: var(--amber);
  color: #14100a;
  transform: rotate(90deg);
}
.faq__item.is-open .faq__sign::after {
  opacity: 0;
}
.faq__item.is-open .faq__q {
  color: var(--amber);
}

.faq__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.55s var(--ease);
}

.faq__a > div {
  padding: 0 0 28px;
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.85;
  max-width: 78ch;
}

/* ----------------------------- 17. CTA 区块 ----------------------------- */
.cta {
  position: relative;
  border: 1px solid var(--line-2);
  border-radius: var(--r-xl);
  overflow: hidden;
  padding: clamp(38px, 6vw, 84px) clamp(24px, 5vw, 72px);
  background: linear-gradient(150deg, var(--ink-800), var(--ink-900) 70%);
  text-align: center;
}

.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
      52% 70% at 50% 0%,
      rgba(224, 164, 88, 0.16),
      transparent 68%
    ),
    radial-gradient(40% 60% at 12% 100%, rgba(95, 166, 158, 0.12), transparent 70%);
  pointer-events: none;
}

.cta > * {
  position: relative;
}

.cta__actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 32px;
}

/* ----------------------------- 18. 页脚 ----------------------------- */
.footer {
  border-top: 1px solid var(--line);
  background: var(--ink-900);
  padding: clamp(48px, 6vw, 82px) 0 34px;
  margin-top: clamp(60px, 8vw, 110px);
}

.footer__top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: clamp(26px, 4vw, 56px);
  padding-bottom: clamp(34px, 4vw, 52px);
  border-bottom: 1px solid var(--line);
}

.footer__brand p {
  margin-top: 18px;
  color: var(--text-2);
  font-size: 0.9rem;
  max-width: 34ch;
  line-height: 1.8;
}

.footer h4 {
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-weight: 400;
  margin-bottom: 20px;
}

.footer__list {
  display: grid;
  gap: 12px;
}

.footer__list a {
  color: var(--text-2);
  font-size: 0.92rem;
  transition: color 0.25s var(--ease), padding-left 0.3s var(--ease);
  display: inline-block;
}

.footer__list a:hover {
  color: var(--amber);
  padding-left: 5px;
}

.footer__contact {
  display: grid;
  gap: 14px;
  font-size: 0.92rem;
  color: var(--text-2);
}

.footer__contact strong {
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding-top: 28px;
  font-size: 0.82rem;
  color: var(--text-3);
}

.footer__bottom a {
  transition: color 0.25s var(--ease);
}

.footer__bottom a:hover {
  color: var(--amber);
}

.footer__social {
  display: flex;
  gap: 10px;
}

.footer__social a {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  color: var(--text-2);
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease),
    transform 0.3s var(--ease);
}

.footer__social a:hover {
  color: var(--amber);
  border-color: rgba(224, 164, 88, 0.4);
  transform: translateY(-2px);
}

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

/* 巨型水印字 */
.footer__watermark {
  margin-top: 40px;
  font-size: clamp(2.6rem, 13vw, 10rem);
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 0.85;
  text-align: center;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.07);
  user-select: none;
  pointer-events: none;
}

/* ----------------------------- 19. 表单 ----------------------------- */
.form {
  display: grid;
  gap: 20px;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.field {
  position: relative;
}

.field input,
.field textarea,
.field select {
  width: 100%;
  background: var(--ink-850);
  border: 1px solid var(--line-2);
  border-radius: var(--r-md);
  padding: 24px 18px 10px;
  font-size: 0.95rem;
  color: var(--text);
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
  appearance: none;
}

.field textarea {
  min-height: 148px;
  resize: vertical;
  padding-top: 28px;
  line-height: 1.7;
}

.field select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23a5a099' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 18px center;
}

.field select option {
  background: var(--ink-850);
}

.field label {
  position: absolute;
  left: 19px;
  top: 17px;
  font-size: 0.92rem;
  color: var(--text-3);
  pointer-events: none;
  transform-origin: left top;
  transition: transform 0.3s var(--ease), color 0.3s var(--ease);
}

.field select + label,
.field textarea + label {
  top: 18px;
}

/* 浮动标签：有值或聚焦时上移 */
.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: rgba(224, 164, 88, 0.55);
  background: var(--ink-800);
  outline: none;
}

.field input:focus + label,
.field input:not(:placeholder-shown) + label,
.field textarea:focus + label,
.field textarea:not(:placeholder-shown) + label,
.field select + label {
  transform: translateY(-10px) scale(0.76);
  color: var(--amber);
}

/* 下拉框的标签常驻顶部，未聚焦时回归次要色 */
.field select:not(:focus) + label {
  color: var(--text-3);
}

/* 已作出选择时，标签转为强调色（由脚本打标） */
.field.is-filled select + label {
  color: var(--amber);
}

.field__error {
  display: block;
  margin-top: 7px;
  font-size: 0.76rem;
  color: var(--clay);
  min-height: 1em;
  opacity: 0;
  transition: opacity 0.25s var(--ease);
}

.field.is-invalid input,
.field.is-invalid textarea,
.field.is-invalid select {
  border-color: rgba(198, 123, 92, 0.7);
}

.field.is-invalid .field__error {
  opacity: 1;
}

.form__note {
  font-size: 0.8rem;
  color: var(--text-3);
}

/* 隐私条款勾选 */
.consent {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  font-size: 0.85rem;
  line-height: 1.65;
  color: var(--text-3);
  cursor: pointer;
  user-select: none;
}

.consent input {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  margin-top: 2px;
  flex-shrink: 0;
  border: 1px solid var(--line-2);
  border-radius: 5px;
  background: var(--ink-850);
  cursor: pointer;
  position: relative;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease);
}

.consent input:checked {
  background: var(--amber);
  border-color: var(--amber);
}

.consent input:checked::after {
  content: "";
  position: absolute;
  left: 5.5px;
  top: 1.5px;
  width: 5px;
  height: 10px;
  border: solid #14100a;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.consent a {
  color: var(--amber);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.consent.is-invalid input {
  border-color: rgba(198, 123, 92, 0.75);
}

.consent.is-invalid + .field__error {
  opacity: 1;
}

/* 表单提交成功提示 */
.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  /* 完全移出视口：自身高度 + 底边距，避免露出一截 */
  transform: translate(-50%, calc(100% + 48px));
  z-index: 950;
  background: var(--ink-800);
  border: 1px solid rgba(224, 164, 88, 0.35);
  border-radius: 999px;
  padding: 13px 26px;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.55s var(--ease), opacity 0.4s var(--ease),
    visibility 0.55s;
  max-width: 90vw;
}

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

.toast svg {
  width: 18px;
  height: 18px;
  color: var(--teal);
  flex-shrink: 0;
}

/* ----------------------------- 20. 信息块 ----------------------------- */
.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, 2vw, 24px);
}

.info {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-850);
  padding: clamp(22px, 2.6vw, 30px);
  transition: border-color 0.4s var(--ease);
}

.info:hover {
  border-color: var(--line-3);
}

.info__k {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 14px;
}

.info__v {
  font-size: 1.12rem;
  font-weight: 500;
  color: #fff;
  line-height: 1.5;
}

.info__v a:hover {
  color: var(--amber);
}

.info p {
  margin-top: 10px;
  font-size: 0.87rem;
  color: var(--text-3);
  line-height: 1.72;
}

/* 页面头（内页） */
.pagehead {
  position: relative;
  padding: calc(var(--nav-h) + clamp(52px, 8vw, 96px)) 0 clamp(40px, 5vw, 64px);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.pagehead::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    50% 70% at 20% 0%,
    rgba(224, 164, 88, 0.11),
    transparent 66%
  );
  pointer-events: none;
}

.pagehead__inner {
  position: relative;
  max-width: 900px;
}

.pagehead .h1 {
  margin: 20px 0 20px;
}

/* 面包屑 */
.crumbs {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.8rem;
  color: var(--text-3);
  font-family: var(--font-mono);
}

.crumbs a:hover {
  color: var(--amber);
}

.crumbs i {
  font-style: normal;
  opacity: 0.5;
}

/* ----------------------------- 21. 列表 / 文章 ----------------------------- */
.post-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.post {
  display: grid;
  grid-template-columns: 130px 1fr auto;
  gap: clamp(18px, 3vw, 44px);
  align-items: center;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left 0.45s var(--ease);
  position: relative;
}

.post:hover {
  padding-left: 14px;
}

.post::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 1px;
  width: 0;
  background: var(--amber);
  transition: width 0.65s var(--ease);
}

.post:hover::before {
  width: 100%;
}

.post__date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-3);
  letter-spacing: 0.06em;
}

.post__title {
  font-size: clamp(1.08rem, 1.9vw, 1.45rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 8px;
  transition: color 0.3s var(--ease);
}

.post:hover .post__title {
  color: var(--amber);
}

.post__excerpt {
  color: var(--text-2);
  font-size: 0.9rem;
  max-width: 68ch;
  line-height: 1.75;
}

.post__cat {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 14px;
  white-space: nowrap;
}

/* 筛选标签 */
.filters {
  display: flex;
  gap: 9px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.filter {
  padding: 8px 17px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--text-2);
  transition: all 0.3s var(--ease);
}

.filter:hover {
  border-color: var(--line-3);
  color: var(--text);
}

.filter.is-active {
  background: var(--amber);
  border-color: var(--amber);
  color: #14100a;
  font-weight: 600;
}

/* 文章正文 */
.article {
  max-width: 74ch;
  margin-inline: auto;
}

.article h2 {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  margin: 52px 0 18px;
}

.article h3 {
  font-size: 1.15rem;
  margin: 34px 0 12px;
}

.article p {
  color: var(--text-2);
  margin-bottom: 20px;
  line-height: 1.9;
}

.article ul,
.article ol {
  margin: 0 0 22px 4px;
  display: grid;
  gap: 10px;
}

.article li {
  color: var(--text-2);
  padding-left: 22px;
  position: relative;
  line-height: 1.8;
}

.article li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
  opacity: 0.75;
}

.article blockquote {
  border-left: 2px solid var(--amber);
  padding: 4px 0 4px 24px;
  margin: 30px 0;
  color: var(--text);
  font-size: 1.1rem;
  line-height: 1.75;
  font-style: italic;
}

.article code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2px 7px;
  color: var(--amber-2);
}

/* ----------------------------- 22. 工具类 ----------------------------- */
.center {
  text-align: center;
}
.mx-auto {
  margin-inline: auto;
}
.mt-0 {
  margin-top: 0;
}
.mt-sm {
  margin-top: 14px;
}
.mt-md {
  margin-top: 26px;
}
.mt-lg {
  margin-top: 44px;
}
.mt-xl {
  margin-top: 68px;
}
.hidden {
  display: none !important;
}

/* 键盘无障碍：跳过导航直达主内容 */
.skip-link {
  position: fixed;
  top: -120px;
  left: 18px;
  z-index: 1000;
  padding: 12px 24px;
  border-radius: 999px;
  background: var(--amber);
  color: #14100a;
  font-size: 0.9rem;
  font-weight: 600;
  transition: top 0.35s var(--ease);
}

.skip-link:focus {
  top: 16px;
}

.badge-note {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 0.8rem;
  color: var(--text-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 15px;
  background: rgba(255, 255, 255, 0.02);
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--moss);
  box-shadow: 0 0 0 4px rgba(139, 164, 110, 0.16);
  flex-shrink: 0;
}

/* ----------------------------- 23. 动效 ----------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.85s var(--ease), transform 0.95s var(--ease);
  transition-delay: var(--d, 0ms);
  will-change: opacity, transform;
}

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

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

[data-reveal="left"] {
  transform: translateX(-30px);
}
[data-reveal="right"] {
  transform: translateX(30px);
}
[data-reveal="zoom"] {
  transform: scale(0.955);
}

[data-reveal].is-in {
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

/* 回到顶部 */
.totop {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 800;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid var(--line-2);
  background: rgba(19, 23, 30, 0.86);
  backdrop-filter: blur(10px);
  display: grid;
  place-items: center;
  color: var(--text-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: all 0.4s var(--ease);
}

.totop.is-show {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.totop:hover {
  color: var(--amber);
  border-color: rgba(224, 164, 88, 0.45);
}

.totop svg {
  width: 18px;
  height: 18px;
}

/* ----------------------------- 24. 响应式 ----------------------------- */
@media (max-width: 1100px) {
  .nav__menu {
    display: none;
  }
  .burger {
    display: block;
  }
  .nav__phone {
    display: none;
  }

  .hero__inner {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 44px;
  }
  .hero__meta {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 34px;
    border-left: 0;
    border-top: 1px solid var(--line);
    padding-left: 0;
    padding-top: 26px;
  }

  .footer__top {
    grid-template-columns: 1fr 1fr;
    row-gap: 40px;
  }

  .plans,
  .quotes,
  .g-3,
  .g-4,
  .info-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats,
  .stats--compact {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat:nth-child(2) {
    border-right: 0;
  }
  .stat:nth-child(1),
  .stat:nth-child(2) {
    border-bottom: 1px solid var(--line);
  }

  .flow {
    grid-template-columns: 1fr;
  }
  .flow__sticky {
    position: static;
  }

  .sec-head {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 20px;
  }
}

@media (max-width: 860px) {
  .bento {
    grid-template-columns: repeat(2, 1fr);
  }
  .bento > *:nth-child(n) {
    grid-column: span 2;
  }

  .g-split,
  .g-split-rev,
  .g-feature {
    grid-template-columns: 1fr;
  }

  .offset-grid > *:nth-child(even),
  .offset-grid > *:nth-child(even):hover {
    transform: none;
  }

  .post {
    grid-template-columns: 1fr;
    gap: 12px;
    align-items: start;
  }
  .post__cat {
    justify-self: start;
  }
  .post:hover {
    padding-left: 0;
  }
}

@media (max-width: 680px) {
  :root {
    --nav-h: 66px;
  }

  body {
    font-size: 15.5px;
  }

  .plans,
  .quotes,
  .g-2,
  .g-3,
  .g-4,
  .info-grid,
  .form__row,
  .stats,
  .stats--compact {
    grid-template-columns: 1fr;
  }

  .stat {
    border-right: 0 !important;
    border-bottom: 1px solid var(--line);
  }
  .stat:last-child {
    border-bottom: 0;
  }

  .footer__top {
    grid-template-columns: 1fr;
  }

  .flow__step {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .flow__idx {
    padding-top: 0;
  }

  .hero__cta .btn,
  .cta__actions .btn {
    width: 100%;
  }

  .hero__title .pill {
    font-size: 0.34em;
    padding: 5px 13px 7px;
    letter-spacing: 0;
    margin-left: 0.1em;
  }

  .trust {
    gap: 16px;
  }
  .trust__items {
    gap: 16px 26px;
  }

  .nav__actions .btn--ghost {
    display: none;
  }

  .totop {
    right: 14px;
    bottom: 14px;
  }

  .footer__watermark {
    -webkit-text-stroke-width: 0.8px;
  }
}