/* ============================================================
   职位匹配器 官网
   Aesthetic: 深墨蓝 + 电光青 · 编辑体排版 · 技术档案感
   ============================================================ */

:root {
  /* 浅色基底（蓝白） */
  --ink: #f5f8ff;
  --ink-2: #eef3fb;
  --ink-3: #e2e8f0;
  --ink-line: #d8e0ed;

  /* 白色/卡片 */
  --paper: #ffffff;
  --paper-2: #f8faff;
  --paper-line: #e2e8f0;

  /* 强调色 - 蓝色系 */
  --volt: #2f6bff;
  --volt-dim: #1a56db;
  --blue: #2f6bff;
  --blue-soft: #6d9aff;
  --amber: #ff8a3d;
  --rose: #ff5470;

  /* 文本 - 深色 */
  --tx-dark: #1a2233;
  --tx-dark-2: #5a6478;
  --tx-dark-3: #8b95a8;
  --tx-light: #ffffff;
  --tx-light-2: #c8d0e0;
  --tx-light-3: #8b95a8;

  --serif: 'Noto Serif SC', 'Songti SC', Georgia, serif;
  --sans: 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
  --mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;

  --pad: clamp(20px, 5vw, 96px);
  --maxw: 1320px;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--ink);
  color: var(--tx-dark);
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

ul,
ol {
  list-style: none;
}

.mono {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

.br-m {
  display: none;
}

/* ============ 全局纹理 ============ */
.grain {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: .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='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

.scanline {
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  opacity: .028;
  background: repeating-linear-gradient(180deg, #fff 0 1px, transparent 1px 4px);
}

/* ============ 导航 ============ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 48px);
  padding: 18px var(--pad);
  transition: background .4s var(--ease), border-color .4s var(--ease), padding .4s var(--ease);
  border-bottom: 1px solid transparent;
}

.nav.stuck {
  background: #fffffff0;
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom-color: var(--ink-line);
  padding-top: 12px;
  padding-bottom: 12px;
  box-shadow: 0 4px 24px -8px #2f6bff22;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-mark {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5px;
  width: 22px;
  height: 22px;
}

.brand-mark span {
  border-radius: 2px;
  background: var(--volt);
}

.brand-mark span:nth-child(2) {
  background: var(--blue-soft);
  border-radius: 2px 2px 2px 7px;
}

.brand-mark span:nth-child(3) {
  background: var(--tx-dark);
  border-radius: 2px 7px 2px 2px;
  opacity: .7;
}

.brand-mark span:nth-child(4) {
  background: var(--volt-dim);
}

.brand-name {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: .04em;
}

.nav-links {
  display: flex;
  gap: clamp(14px, 2.2vw, 34px);
  margin-left: auto;
  font-size: 14px;
  color: var(--tx-dark-2);
}

.nav-links a {
  position: relative;
  padding: 4px 0;
  transition: color .25s;
  white-space: nowrap;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--volt);
  transition: width .3s var(--ease);
}

.nav-links a:hover {
  color: var(--tx-dark);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  border: 1px solid var(--volt);
  border-radius: 999px;
  color: var(--volt);
  font-size: 13.5px;
  font-weight: 500;
  white-space: nowrap;
  transition: background .3s var(--ease), color .3s var(--ease), box-shadow .3s;
}

.nav-cta svg {
  width: 14px;
  height: 14px;
  transition: transform .3s var(--ease);
}

.nav-cta:hover {
  background: var(--volt);
  color: #fff;
  box-shadow: 0 0 28px #2f6bff55;
}

.nav-cta:hover svg {
  transform: translateX(3px);
}

.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--ink-line);
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
}

.nav-burger span {
  display: block;
  width: 18px;
  height: 1.6px;
  margin: 0 auto;
  background: var(--tx-dark);
  transition: transform .3s var(--ease), opacity .2s;
}

.nav-burger.on span:nth-child(1) {
  transform: translateY(3.8px) rotate(45deg);
}

.nav-burger.on span:nth-child(2) {
  transform: translateY(-3.8px) rotate(-45deg);
}

/* 移动菜单 */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 890;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 86px var(--pad) 28px;
  background: #fffffff8;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--ink-line);
  transform: translateY(-102%);
  transition: transform .48s var(--ease);
  box-shadow: 0 12px 40px -12px #2f6bff22;
}

.mobile-menu.open {
  transform: translateY(0);
}

.mobile-menu a {
  padding: 15px 0;
  border-bottom: 1px solid var(--ink-line);
  font-size: 17px;
  color: var(--tx-dark-2);
}

.mobile-menu a:active {
  color: var(--volt);
}

.mobile-menu .mm-cta {
  margin-top: 18px;
  border: 1px solid var(--volt);
  border-radius: 999px;
  text-align: center;
  color: var(--volt);
  font-weight: 500;
}

/* ============ 通用按钮 ============ */
.btn-primary {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 28px;
  border-radius: 999px;
  background: var(--volt);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
  box-shadow: 0 8px 34px -8px #2f6bff88;
}

.btn-primary svg {
  width: 18px;
  height: 18px;
  transition: transform .3s var(--ease);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, transparent 20%, #ffffff90 50%, transparent 80%);
  transform: translateX(-130%);
  transition: transform .7s var(--ease);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 44px -8px #2f6bffaa;
}

.btn-primary:hover::before {
  transform: translateX(130%);
}

.btn-primary:hover svg {
  transform: translateX(4px);
}

.btn-primary.lg {
  padding: 18px 36px;
  font-size: 16.5px;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 15px 26px;
  border: 1px solid var(--ink-line);
  border-radius: 999px;
  color: var(--tx-dark-2);
  font-size: 15px;
  transition: border-color .3s, color .3s, background .3s;
}

.btn-ghost:hover {
  border-color: var(--volt);
  color: var(--volt);
  background: #2f6bff08;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 18px 34px;
  border: 1px solid var(--ink-line);
  border-radius: 999px;
  color: var(--tx-dark);
  font-size: 16.5px;
  transition: border-color .3s, background .3s, color .3s;
}

.btn-outline:hover {
  border-color: var(--volt);
  background: #2f6bff12;
  color: var(--volt);
}

/* ============ 入场动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .85s var(--ease) var(--d, 0s), transform .85s var(--ease) var(--d, 0s);
}

.reveal.in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100svh;
  padding: clamp(120px, 16vh, 190px) var(--pad) clamp(60px, 9vh, 110px);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -24%;
  right: -12%;
  width: min(1000px, 105vw);
  aspect-ratio: 1;
  background:
    radial-gradient(circle at 32% 30%, #2f6bff22, transparent 58%),
    radial-gradient(circle at 68% 62%, #6d9aff1a, transparent 60%);
  filter: blur(30px);
  pointer-events: none;
  animation: drift 22s ease-in-out infinite alternate;
}

@keyframes drift {
  to {
    transform: translate3d(-5%, 4%, 0) scale(1.08);
  }
}

.hero-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(#2f6bff08 1px, transparent 1px),
    linear-gradient(90deg, #2f6bff08 1px, transparent 1px);
  background-size: 76px 76px;
  mask-image: radial-gradient(ellipse 78% 62% at 50% 42%, #000 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 78% 62% at 50% 42%, #000 30%, transparent 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  gap: clamp(40px, 5vw, 80px);
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 26px;
  padding: 7px 15px 7px 12px;
  border: 1px solid #2f6bff35;
  border-radius: 999px;
  background: #2f6bff0c;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--volt);
}

.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--volt);
  box-shadow: 0 0 0 0 #2f6bffaa;
  animation: pulse 2.4s ease-out infinite;
}

@keyframes pulse {
  70% {
    box-shadow: 0 0 0 8px #2f6bff00;
  }

  100% {
    box-shadow: 0 0 0 0 #2f6bff00;
  }
}

.hero-title {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(40px, 6.6vw, 90px);
  line-height: 1.1;
  letter-spacing: -.02em;
}

.hero-title .line {
  display: block;
}

.hero-title .num {
  font-family: var(--mono);
  font-style: normal;
  font-weight: 700;
  color: var(--volt);
  letter-spacing: -.03em;
  padding: 0 .06em;
}

.hero-title .num.zero {
  position: relative;
  color: var(--rose);
}

.hero-title .num.zero::after {
  content: '';
  position: absolute;
  left: -6%;
  right: -6%;
  top: 52%;
  height: 4px;
  background: var(--rose);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  animation: strike 1s var(--ease) 1.1s forwards;
}

@keyframes strike {
  to {
    transform: scaleX(1);
  }
}

.hero-sub {
  margin-top: 26px;
  max-width: 30em;
  font-size: clamp(15.5px, 1.6vw, 18.5px);
  font-weight: 300;
  line-height: 1.85;
  color: var(--tx-dark-2);
}

.hero-verdict {
  display: flex;
  gap: 16px;
  margin-top: 30px;
  max-width: 32em;
}

.verdict-bar {
  flex-shrink: 0;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--volt), transparent);
}

.hero-verdict p {
  font-size: clamp(14.5px, 1.5vw, 16.5px);
  line-height: 1.8;
  color: var(--tx-dark-2);
}

.hero-verdict strong {
  color: var(--tx-dark);
  font-weight: 700;
  background: linear-gradient(transparent 62%, #2f6bff28 62%);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.hero-stats {
  display: flex;
  align-items: stretch;
  gap: clamp(16px, 2.6vw, 34px);
  margin-top: 52px;
  padding-top: 30px;
  border-top: 1px solid var(--ink-line);
}

.hstat {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.hstat-div {
  width: 1px;
  background: var(--ink-line);
}

.hstat-num {
  font-family: var(--mono);
  font-weight: 700;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.1;
  color: var(--volt);
  letter-spacing: -.03em;
}

.hstat-num em {
  font-style: normal;
}

.hstat-num small {
  font-family: var(--sans);
  font-size: .46em;
  font-weight: 500;
  margin-left: 2px;
  color: var(--tx-light-2);
}

.hstat-label {
  font-size: 12.5px;
  color: var(--tx-light-3);
  letter-spacing: .02em;
}

/* ---- 手机 mockup ---- */
.hero-visual {
  display: flex;
  justify-content: center;
}

.phone-stack {
  position: relative;
  width: min(324px, 76vw);
}

.phone-halo {
  position: absolute;
  inset: -16% -22%;
  background: radial-gradient(circle at 50% 45%, #2f6bff30, transparent 66%);
  filter: blur(24px);
}

.phone {
  position: relative;
  z-index: 2;
  border-radius: 42px;
  padding: 11px;
  background: linear-gradient(160deg, #262c48, #0e1120 46%, #1b2138);
  box-shadow:
    0 50px 100px -30px #000000d0,
    0 0 0 1px #ffffff12 inset,
    0 2px 0 #ffffff10 inset;
  animation: floaty 7s ease-in-out infinite;
}

@keyframes floaty {

  0%,
  100% {
    transform: translateY(0) rotate(-1.1deg);
  }

  50% {
    transform: translateY(-13px) rotate(.5deg);
  }
}

.phone-notch {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 4;
  width: 82px;
  height: 22px;
  border-radius: 999px;
  background: #05060c;
}

.phone-screen {
  border-radius: 33px;
  background: linear-gradient(178deg, #f4f7ff, #ffffff 34%);
  padding: 13px 16px 18px;
  color: var(--tx-dark);
  overflow: hidden;
}

.ps-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 24px;
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 700;
  color: var(--tx-dark);
}

.ps-bar-r {
  display: flex;
  align-items: flex-end;
  gap: 2.5px;
}

.ps-bar-r i {
  width: 3px;
  border-radius: 1px;
  background: var(--tx-dark);
}

.ps-bar-r i:nth-child(1) {
  height: 5px;
}

.ps-bar-r i:nth-child(2) {
  height: 8px;
}

.ps-bar-r i:nth-child(3) {
  height: 11px;
}

.ps-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 0 4px;
}

.ps-back {
  width: 7px;
  height: 7px;
  border-left: 1.8px solid var(--tx-dark);
  border-bottom: 1.8px solid var(--tx-dark);
  transform: rotate(45deg);
}

.ps-title {
  font-size: 14px;
  font-weight: 700;
}

.ps-job {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-top: 12px;
  padding: 13px 14px;
  border-radius: 14px;
  background: linear-gradient(120deg, #eef3ff, #f7f9ff);
  border: 1px solid #dde5fb;
}

.ps-job-tag {
  align-self: flex-start;
  padding: 2px 8px;
  border-radius: 5px;
  background: var(--blue);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .06em;
}

.ps-job-name {
  margin-top: 3px;
  font-size: 15px;
  font-weight: 700;
  color: var(--tx-dark);
}

.ps-job-co {
  font-size: 11.5px;
  color: var(--tx-dark-3);
}

.ps-ring-wrap {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 16px;
}

.ps-ring {
  position: relative;
  width: 104px;
  height: 104px;
  flex-shrink: 0;
}

.ps-ring svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.ring-bg {
  fill: none;
  stroke: #e6ebf7;
  stroke-width: 9;
}

.ring-fg {
  fill: none;
  stroke: url(#g);
  stroke: var(--blue);
  stroke-width: 9;
  stroke-linecap: round;
  stroke-dasharray: 327;
  stroke-dashoffset: 327;
  transition: stroke-dashoffset 1.6s var(--ease);
}

.ps-ring.on .ring-fg {
  stroke-dashoffset: 46;
}

.ps-ring-txt {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
}

.ps-pct {
  font-family: var(--mono);
  font-size: 25px;
  font-weight: 700;
  line-height: 1;
  color: var(--blue);
  letter-spacing: -.04em;
}

.ps-pct-l {
  font-size: 10.5px;
  color: var(--tx-dark-3);
}

.ps-ring-side {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.ps-count {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--tx-dark);
}

.ps-count em {
  font-style: normal;
  color: var(--volt-dim);
}

.ps-count-l {
  font-size: 11.5px;
  color: var(--tx-dark-3);
}

.ps-rows {
  margin-top: 14px;
  border-top: 1px solid #eceff8;
}

.ps-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 9px 0;
  border-bottom: 1px solid #f2f4fa;
  font-size: 12.5px;
  color: var(--tx-dark-2);
}

.ps-row b {
  font-size: 11.5px;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 5px;
}

.ps-row b.ok {
  background: #e2fbf4;
  color: #009a7e;
}

.ps-row b.no {
  background: #ffe9ed;
  color: #e0344f;
}

.ps-btn {
  margin-top: 16px;
  padding: 13px;
  border-radius: 999px;
  background: var(--blue);
  color: #fff;
  text-align: center;
  font-size: 13.5px;
  font-weight: 500;
  box-shadow: 0 8px 22px -8px #2f6bff90;
}

/* 悬浮卡 */
.float-qr,
.float-stat {
  position: absolute;
  z-index: 3;
  border-radius: 16px;
  background: #fffffff0;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid #e2e8f0;
  box-shadow: 0 22px 54px -18px #2f6bff33;
}

.float-qr {
  left: -13%;
  bottom: 15%;
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 11px 14px 11px 11px;
  animation: floaty2 8s ease-in-out infinite;
}

@keyframes floaty2 {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(11px);
  }
}

.fq-code {
  width: 38px;
  height: 38px;
  border-radius: 7px;
  background:
    conic-gradient(from 0deg, #fff 0 25%, transparent 0 50%, #fff 0 75%, transparent 0) 0 0/9px 9px,
    #0d1020;
  box-shadow: 0 0 0 2px #ffffff20 inset;
}

.fq-txt {
  display: flex;
  flex-direction: column;
}

.fq-t {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--volt);
}

.fq-s {
  font-size: 10.5px;
  color: var(--tx-light-3);
  white-space: nowrap;
}

.float-stat {
  right: -10%;
  top: 12%;
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 12px 16px;
  animation: floaty3 6.4s ease-in-out infinite;
}

@keyframes floaty3 {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-9px);
  }
}

.fs-l {
  font-size: 10.5px;
  color: var(--tx-light-3);
  letter-spacing: .06em;
}

.fs-n {
  font-family: var(--mono);
  font-size: 23px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--tx-dark);
}

.fs-trend {
  font-size: 11px;
  font-weight: 700;
  color: var(--volt);
}

.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  z-index: 3;
  width: 22px;
  height: 38px;
  border: 1px solid #ffffff22;
  border-radius: 999px;
  display: flex;
  justify-content: center;
  padding-top: 7px;
}

.hero-scroll span {
  width: 3px;
  height: 7px;
  border-radius: 2px;
  background: var(--volt);
  animation: scrolldot 1.9s var(--ease) infinite;
}

@keyframes scrolldot {
  0% {
    opacity: 0;
    transform: translateY(0);
  }

  40% {
    opacity: 1;
  }

  100% {
    opacity: 0;
    transform: translateY(17px);
  }
}

/* ============ 滚动字幕 ============ */
.marquee {
  overflow: hidden;
  padding: 20px 0;
  border-top: 1px solid var(--ink-line);
  border-bottom: 1px solid var(--ink-line);
  background: var(--paper-2);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}

.marquee-track {
  display: flex;
  align-items: center;
  gap: 22px;
  width: max-content;
  animation: marq 34s linear infinite;
}

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

.marquee-track span {
  font-family: var(--serif);
  font-size: clamp(19px, 2.6vw, 32px);
  font-weight: 700;
  color: var(--tx-dark-3);
  white-space: nowrap;
}

.marquee-track i {
  color: var(--volt);
  font-style: normal;
  font-size: 15px;
}

/* ============================================================
   通用 section
   ============================================================ */
.sec {
  position: relative;
  padding: clamp(76px, 11vh, 150px) var(--pad);
}

.sec-head {
  max-width: var(--maxw);
  margin: 0 auto clamp(44px, 6vw, 78px);
}

.sec-num {
  display: inline-block;
  margin-bottom: 16px;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .3em;
  color: var(--volt-dim);
}

.sec-num.light {
  color: var(--volt);
}

.sec-title {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(29px, 4.6vw, 60px);
  line-height: 1.22;
  letter-spacing: -.015em;
  color: var(--tx-dark);
}

.sec-title.light {
  color: var(--tx-dark);
}

.sec-title em {
  font-style: normal;
  position: relative;
  white-space: nowrap;
}

.sec-title em::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: .06em;
  height: .26em;
  background: #2f6bff30;
  border-radius: 3px;
  z-index: -1;
}

.sec-title em.hl {
  color: var(--volt);
}

.sec-title em.hl::after {
  display: none;
}

.sec-desc {
  margin-top: 20px;
  max-width: 34em;
  font-size: clamp(14.5px, 1.5vw, 17.5px);
  font-weight: 300;
  line-height: 1.85;
  color: var(--tx-dark-2);
}

.sec-desc.light {
  color: var(--tx-dark-2);
}

/* ============ 01 问题（浅色） ============ */
.problem {
  background: var(--paper);
  color: var(--tx-dark);
}

.problem::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(#0a0c1608 1px, transparent 1px),
    linear-gradient(90deg, #0a0c1608 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, #000, transparent 62%);
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 62%);
}

.prob-grid {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  border-top: 1px solid var(--paper-line);
}

.prob {
  position: relative;
  padding: clamp(28px, 3vw, 42px) clamp(20px, 2.4vw, 34px);
  border-bottom: 1px solid var(--paper-line);
  border-right: 1px solid var(--paper-line);
  transition: background .4s var(--ease);
}

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

.prob::after {
  content: '';
  position: absolute;
  left: 0;
  top: -1px;
  width: 0;
  height: 2px;
  background: var(--tx-dark);
  transition: width .45s var(--ease);
}

.prob:hover {
  background: var(--paper-2);
}

.prob:hover::after {
  width: 100%;
}

.prob-idx {
  display: block;
  margin-bottom: 20px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--tx-dark-3);
}

.prob h3 {
  font-family: var(--serif);
  font-size: clamp(17.5px, 1.9vw, 21px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--tx-dark);
}

.prob p {
  margin-top: 12px;
  font-size: 14px;
  font-weight: 300;
  line-height: 1.85;
  color: var(--tx-dark-2);
}

/* ============ 02 解法（深色） ============ */
.solution {
  background: var(--ink);
  overflow: hidden;
}

.sol-bg {
  position: absolute;
  left: 50%;
  top: 8%;
  transform: translateX(-50%);
  width: min(1200px, 130vw);
  aspect-ratio: 2/1;
  background: radial-gradient(ellipse at 50% 0%, #2f6bff18, transparent 62%);
  pointer-events: none;
}

.flow {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  gap: 0;
}

.flow-step {
  position: relative;
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr) 130px;
  gap: clamp(16px, 3vw, 40px);
  align-items: center;
  padding: clamp(26px, 3.4vw, 40px) 0;
  border-bottom: 1px solid var(--ink-line);
}

.flow-step:first-child {
  border-top: 1px solid var(--ink-line);
}

.fs-num {
  font-family: var(--serif);
  font-size: clamp(34px, 4.4vw, 54px);
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.4px var(--volt);
  transition: color .4s var(--ease);
}

.flow-step:hover .fs-num {
  color: var(--volt);
}

.fs-body h3 {
  font-family: var(--serif);
  font-size: clamp(19px, 2.2vw, 27px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--tx-dark);
}

.fs-body p {
  margin-top: 9px;
  max-width: 40em;
  font-size: 14.5px;
  font-weight: 300;
  line-height: 1.85;
  color: var(--tx-dark-2);
}

/* 步骤装饰图形（纯 CSS） */
.fs-art {
  position: relative;
  height: 62px;
  border-radius: 12px;
  background: #2f6bff08;
  border: 1px solid var(--ink-line);
  overflow: hidden;
}

.art-form {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  padding: 0 14px;
}

.art-form span {
  height: 5px;
  border-radius: 3px;
  background: var(--tx-light-3);
  opacity: .5;
}

.art-form span:nth-child(1) {
  width: 78%;
}

.art-form span:nth-child(2) {
  width: 54%;
}

.art-form span:nth-child(3) {
  width: 66%;
  background: var(--volt);
  opacity: 1;
}

.art-form span:nth-child(4) {
  width: 38%;
}

.art-spread {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
}

.art-spread i {
  width: 9px;
  height: 9px;
  border-radius: 3px;
  background: var(--volt);
  animation: spread 1.9s var(--ease) infinite;
}

.art-spread i:nth-child(2) {
  animation-delay: .12s;
}

.art-spread i:nth-child(3) {
  animation-delay: .24s;
}

.art-spread i:nth-child(4) {
  animation-delay: .36s;
}

.art-spread i:nth-child(5) {
  animation-delay: .48s;
}

@keyframes spread {

  0%,
  100% {
    opacity: .28;
    transform: scale(.8);
  }

  50% {
    opacity: 1;
    transform: scale(1.24);
  }
}

.art-scan::before {
  content: '';
  position: absolute;
  inset: 15px 40%;
  border: 1.6px solid var(--tx-light-3);
  border-radius: 5px;
  opacity: .55;
}

.art-scan b {
  position: absolute;
  left: 22%;
  right: 22%;
  top: 15px;
  height: 2px;
  background: var(--volt);
  box-shadow: 0 0 12px 2px #00e5c0aa;
  animation: scanline 2.1s var(--ease) infinite;
}

@keyframes scanline {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(30px);
  }
}

.art-cert {
  display: flex;
  align-items: center;
  justify-content: center;
}

.art-cert span {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 2px solid var(--volt);
  position: relative;
}

.art-cert span::after {
  content: '';
  position: absolute;
  left: 8px;
  top: 12px;
  width: 12px;
  height: 6px;
  border-left: 2px solid var(--volt);
  border-bottom: 2px solid var(--volt);
  transform: rotate(-45deg);
}

.sol-quote {
  max-width: var(--maxw);
  margin: clamp(48px, 6vw, 80px) auto 0;
  text-align: center;
}

.sol-quote p {
  font-family: var(--serif);
  font-size: clamp(21px, 3.4vw, 42px);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .01em;
  background: linear-gradient(96deg, var(--volt-dim), var(--blue-soft) 60%, var(--volt));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ============ 03 三种码（浅色） ============ */
.codes {
  background: var(--paper);
  color: var(--tx-dark);
}

.code-grid {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(272px, 1fr));
  gap: clamp(16px, 2vw, 26px);
}

.code-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(24px, 2.8vw, 36px);
  border: 1px solid var(--paper-line);
  border-radius: 20px;
  background: #fdfdfb;
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .4s;
}

.code-card:hover {
  transform: translateY(-6px);
  border-color: #b9b6a8;
  box-shadow: 0 26px 56px -22px #0a0c1633;
}

.code-card.feat {
  background: linear-gradient(160deg, #1a3a8a, #0f2560 60%, #1a3a8a);
  border-color: #1a3a8a;
  color: var(--tx-light);
  box-shadow: 0 30px 66px -26px #2f6bff66;
}

.cc-badge {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 4px 11px;
  border-radius: 999px;
  background: var(--volt);
  color: var(--ink);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
}

.cc-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.cc-tag {
  padding: 5px 13px;
  border-radius: 7px;
  background: var(--tx-dark);
  color: var(--paper);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .1em;
}

.code-card.feat .cc-tag {
  background: var(--volt);
  color: var(--ink);
}

.cc-qr {
  width: 34px;
  height: 34px;
  border-radius: 6px;
  background:
    conic-gradient(from 0deg, currentColor 0 25%, transparent 0 50%, currentColor 0 75%, transparent 0) 0 0/8px 8px;
  color: var(--tx-dark-3);
  opacity: .5;
}

.code-card.feat .cc-qr {
  color: var(--volt);
  opacity: .75;
}

.code-card h3 {
  font-family: var(--serif);
  font-size: clamp(19px, 2.1vw, 24px);
  font-weight: 700;
  line-height: 1.4;
}

.code-card>p {
  margin-top: 13px;
  font-size: 14px;
  font-weight: 300;
  line-height: 1.85;
  color: var(--tx-dark-2);
}

.code-card.feat>p {
  color: var(--tx-light-2);
}

.code-card ul {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--paper-line);
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.code-card.feat ul {
  border-top-color: var(--ink-line);
}

.code-card li {
  position: relative;
  padding-left: 20px;
  font-size: 13.5px;
  color: var(--tx-dark-2);
}

.code-card.feat li {
  color: var(--tx-light-2);
}

.code-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: .58em;
  width: 9px;
  height: 5px;
  border-left: 1.8px solid var(--volt-dim);
  border-bottom: 1.8px solid var(--volt-dim);
  transform: rotate(-45deg);
}

.code-card.feat li::before {
  border-color: var(--volt);
}

/* ============ 04 数据看板（深色） ============ */
.data {
  background: var(--ink-2);
}

.dash {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 2vw, 24px);
}

.dash-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: clamp(16px, 2vw, 24px);
}

.dash-row.wide {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.kpi {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(22px, 2.6vw, 32px);
  border: 1px solid var(--ink-line);
  border-radius: 18px;
  background: #ffffff;
  transition: border-color .4s, transform .4s var(--ease), box-shadow .4s;
  box-shadow: 0 4px 20px -8px #2f6bff15;
}

.kpi:hover {
  border-color: #2f6bff45;
  transform: translateY(-4px);
  box-shadow: 0 12px 32px -10px #2f6bff33;
}

.kpi-l {
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--tx-light-3);
}

.kpi-l em {
  font-family: var(--mono);
  font-style: normal;
  font-size: 11px;
  color: var(--volt-dim);
}

.kpi-n {
  font-family: var(--mono);
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -.04em;
  color: var(--tx-dark);
}

.kpi-t {
  font-size: 12.5px;
  font-weight: 700;
}

.kpi-t.up {
  color: var(--volt);
}

.panel {
  padding: clamp(22px, 2.6vw, 32px);
  border: 1px solid var(--ink-line);
  border-radius: 18px;
  background: #ffffff;
  box-shadow: 0 4px 20px -8px #2f6bff15;
}

.panel-h {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--ink-line);
}

.panel-h h3 {
  font-family: var(--serif);
  font-size: clamp(16.5px, 1.8vw, 20px);
  font-weight: 700;
  color: var(--tx-dark);
}

.panel-s {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--tx-light-3);
  white-space: nowrap;
}

.bars {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.bar-item {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) 42px;
  gap: 12px;
  align-items: center;
}

.bi-l {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--tx-dark-2);
  white-space: nowrap;
}

.bi-track {
  height: 8px;
  border-radius: 999px;
  background: #e8ecf4;
  overflow: hidden;
}

.bi-track i {
  display: block;
  width: 0;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--volt-dim), var(--volt));
  transition: width 1.3s var(--ease);
}

.bars.alt .bi-track i {
  background: linear-gradient(90deg, #ff6f3d, var(--amber));
}

.bars.on .bi-track i {
  width: var(--w);
}

.bi-v {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  text-align: right;
  color: var(--tx-dark);
}

.panel-note {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--ink-line);
  font-size: 13px;
  font-weight: 300;
  line-height: 1.75;
  color: var(--tx-light-3);
}

/* ============ 05 求职者（浅色） ============ */
.seeker {
  background: var(--paper);
  color: var(--tx-dark);
}

.seeker-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  gap: clamp(40px, 5vw, 84px);
  align-items: center;
}

.sk-list {
  display: flex;
  flex-direction: column;
  margin-top: 40px;
  border-top: 1px solid var(--paper-line);
}

.sk {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--paper-line);
}

.sk-i {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--volt-dim);
  padding-top: 3px;
}

.sk h3 {
  font-family: var(--serif);
  font-size: clamp(16.5px, 1.8vw, 20px);
  font-weight: 700;
  line-height: 1.45;
}

.sk p {
  margin-top: 7px;
  font-size: 13.5px;
  font-weight: 300;
  line-height: 1.8;
  color: var(--tx-dark-2);
}

/* 凭证卡 */
.seeker-art {
  display: flex;
  justify-content: center;
}

.cert {
  position: relative;
  width: min(370px, 100%);
  padding: clamp(24px, 3vw, 34px);
  border-radius: 22px;
  background: linear-gradient(165deg, #101527, #080a14 58%);
  color: var(--tx-light);
  box-shadow: 0 40px 84px -32px #0a0c1666;
  overflow: hidden;
}

.cert::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -30%;
  width: 78%;
  aspect-ratio: 1;
  background: radial-gradient(circle, #2f6bff33, transparent 66%);
}

.cert-h {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 20px;
  border-bottom: 1px dashed #ffffff20;
}

.cert-badge {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--volt);
  position: relative;
  flex-shrink: 0;
}

.cert-badge::after {
  content: '';
  position: absolute;
  left: 6px;
  top: 8px;
  width: 9px;
  height: 5px;
  border-left: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  transform: rotate(-45deg);
}

.cert-t {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .08em;
}

.cert-pct {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 24px 0 22px;
}

.cert-n {
  font-family: var(--mono);
  font-size: clamp(52px, 8vw, 74px);
  font-weight: 700;
  line-height: .9;
  letter-spacing: -.05em;
  color: var(--volt);
}

.cert-n small {
  font-size: .42em;
  margin-left: 2px;
}

.cert-l {
  font-size: 13px;
  color: var(--tx-light-3);
  letter-spacing: .1em;
}

.cert-meta {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 11px;
  padding: 20px 0;
  border-top: 1px dashed #ffffff20;
  border-bottom: 1px dashed #ffffff20;
}

.cert-meta>div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  font-size: 13px;
}

.cert-meta span {
  color: var(--tx-light-3);
  white-space: nowrap;
}

.cert-meta b {
  font-weight: 500;
  color: var(--tx-light);
  text-align: right;
}

.cert-foot {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 20px;
}

.cert-qr {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  border-radius: 8px;
  background:
    conic-gradient(from 0deg, #fff 0 25%, transparent 0 50%, #fff 0 75%, transparent 0) 0 0/10px 10px,
    #0d1020;
  box-shadow: 0 0 0 2px #ffffff1a inset;
}

.cert-foot p {
  font-size: 11.5px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--tx-light-3);
}

/* ============ CTA ============ */
.cta {
  position: relative;
  padding: clamp(84px, 13vh, 170px) var(--pad);
  background: linear-gradient(160deg, #1a3a8a 0%, #0f2560 50%, #1a3a8a 100%);
  overflow: hidden;
  text-align: center;
}

.cta-glow {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(1100px, 128vw);
  aspect-ratio: 1;
  background:
    radial-gradient(circle at 50% 50%, #2f6bff40, transparent 52%),
    radial-gradient(circle at 62% 40%, #6d9aff30, transparent 56%);
  filter: blur(26px);
  pointer-events: none;
}

.cta-inner {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
}

.cta h2 {
  font-family: var(--serif);
  font-size: clamp(29px, 5.2vw, 66px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--tx-light);
}

.cta>.cta-inner>p {
  margin: 24px auto 0;
  max-width: 34em;
  font-size: clamp(14.5px, 1.6vw, 17.5px);
  font-weight: 300;
  line-height: 1.85;
  color: var(--tx-light-2);
}

.cta-btns {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 42px;
}

.cta-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 36px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--tx-light-3);
}

.cta-tags i {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--volt-dim);
}

/* ============ FOOTER ============ */
.footer {
  padding: clamp(52px, 7vw, 84px) var(--pad) 34px;
  background: linear-gradient(180deg, #0a1a40, #050d28);
  border-top: 1px solid var(--ink-line);
}

.ft-top {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.6fr);
  gap: clamp(36px, 5vw, 76px);
  padding-bottom: clamp(36px, 5vw, 56px);
  border-bottom: 1px solid var(--ink-line);
}

.ft-brand p {
  margin-top: 18px;
  font-size: 13.5px;
  font-weight: 300;
  line-height: 1.85;
  color: var(--tx-light-3);
}

.ft-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: clamp(20px, 3vw, 40px);
}

.ft-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ft-col h4 {
  margin-bottom: 4px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--volt-dim);
}

.ft-col a {
  font-size: 13.5px;
  color: var(--tx-light-2);
  transition: color .25s, transform .25s var(--ease);
}

.ft-col a:hover {
  color: var(--volt);
  transform: translateX(3px);
}

.ft-bot {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 26px;
  font-size: 12px;
  color: var(--tx-light-3);
}

.ft-bot .mono {
  font-size: 11px;
  letter-spacing: .01em;
}

/* ============================================================
   响应式
   ============================================================ */

/* 平板横向 / 小笔电 */
@media (max-width: 1080px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 54px;
  }

  .hero-copy {
    max-width: 640px;
  }

  .hero-visual {
    order: 2;
  }

  .phone-stack {
    width: min(300px, 70vw);
  }

  .float-qr {
    left: -8%;
  }

  .float-stat {
    right: -6%;
  }

  .seeker-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .ft-top {
    grid-template-columns: 1fr;
  }
}

/* 平板竖向 */
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .nav-burger {
    display: flex;
    margin-left: auto;
  }

  .nav-cta {
    display: none;
  }

  .flow-step {
    grid-template-columns: 48px minmax(0, 1fr);
  }

  .fs-art {
    display: none;
  }

  .prob {
    border-right: none;
  }

  .prob-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
}

/* 手机 */
@media (max-width: 640px) {
  :root {
    --pad: 20px;
  }

  .br-m {
    display: inline;
  }

  .scanline {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-top: 104px;
    text-align: left;
  }

  .hero-title {
    font-size: clamp(33px, 9.6vw, 46px);
  }

  .hero-stats {
    flex-direction: column;
    gap: 20px;
    margin-top: 40px;
  }

  .hstat-div {
    width: 100%;
    height: 1px;
  }

  .hstat {
    flex-direction: row;
    align-items: baseline;
    gap: 12px;
  }

  .hstat-num {
    min-width: 82px;
    font-size: 25px;
  }

  .hero-actions .btn-primary,
  .hero-actions .btn-ghost {
    flex: 1 1 100%;
    justify-content: center;
  }

  .hero-scroll {
    display: none;
  }

  .phone-stack {
    width: min(290px, 82vw);
  }

  .float-qr {
    left: -4%;
    bottom: 8%;
    padding: 9px 12px 9px 9px;
  }

  .fq-code {
    width: 32px;
    height: 32px;
  }

  .float-stat {
    right: -4%;
    top: 6%;
    padding: 10px 13px;
  }

  .fs-n {
    font-size: 19px;
  }

  .marquee {
    padding: 14px 0;
  }

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

  .prob {
    padding: 24px 0;
  }

  .prob-idx {
    margin-bottom: 14px;
  }

  .flow-step {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 14px;
    padding: 24px 0;
  }

  .fs-num {
    font-size: 30px;
  }

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

  .bar-item {
    grid-template-columns: 64px minmax(0, 1fr) 38px;
    gap: 9px;
  }

  .bi-l {
    font-size: 10.5px;
  }

  .panel-h {
    flex-direction: column;
    gap: 4px;
    align-items: flex-start;
  }

  .sk {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 12px;
    padding: 18px 0;
  }

  .cta-btns .btn-primary,
  .cta-btns .btn-outline {
    flex: 1 1 100%;
    justify-content: center;
  }

  .ft-bot {
    flex-direction: column;
    gap: 6px;
  }
}

/* 超小屏 */
@media (max-width: 380px) {
  .hero-title {
    font-size: 30px;
  }

  .cert-n {
    font-size: 46px;
  }

  .cert-meta>div {
    font-size: 12px;
  }
}

/* ============================================================
   美化增强层
   ============================================================ */

/* ---------- 1. 顶部滚动进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9990;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--volt-dim), var(--blue-soft), var(--volt-dim));
  background-size: 200% 100%;
  box-shadow: 0 0 12px #2f6bff88;
  transition: width .1s linear;
  animation: progressShimmer 3s linear infinite;
}

@keyframes progressShimmer {
  to {
    background-position: 200% 0;
  }
}

/* ---------- 2. 鼠标聚光灯 ---------- */
.cursor-spotlight {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, #2f6bff18 0%, #6d9aff10 35%, transparent 70%);
  opacity: 0;
  transform: translate(-50%, -50%);
  transition: opacity .5s var(--ease);
  mix-blend-mode: multiply;
  will-change: transform, opacity;
}

.cursor-spotlight.active {
  opacity: 1;
}

/* ---------- 3. 导航当前项高亮 ---------- */
.nav-links a.active {
  color: var(--volt);
}

.nav-links a.active::after {
  width: 100%;
  background: var(--volt);
}

/* ---------- 4. 3D 卡片倾斜（三种码 / 问题卡） ---------- */
.code-card,
.prob {
  transform-style: preserve-3d;
  perspective: 1000px;
  will-change: transform;
}

.code-card {
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .4s;
}

.code-card.tilt-hover {
  transform: translateY(-8px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
}

.code-card.feat.tilt-hover {
  box-shadow:
    0 36px 72px -24px #2f6bff66,
    0 0 0 1px #2f6bff44 inset;
}

.code-card:not(.feat).tilt-hover {
  box-shadow:
    0 30px 60px -24px #2f6bff33,
    0 0 40px -10px #2f6bff22;
}

/* 卡片内部元素的 3D 层级 */
.code-card .cc-top {
  transform: translateZ(20px);
}

.code-card h3 {
  transform: translateZ(30px);
}

.code-card>p {
  transform: translateZ(15px);
}

.code-card ul {
  transform: translateZ(25px);
}

.prob.tilt-hover {
  background: var(--paper-2);
  transform: translateY(-4px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
}

/* ---------- 5. 回到顶部按钮 ---------- */
.back-top {
  position: fixed;
  right: clamp(16px, 3vw, 36px);
  bottom: clamp(16px, 3vw, 36px);
  z-index: 800;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #2f6bff30;
  border-radius: 50%;
  background: #fffffff0;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: var(--volt);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(.9);
  transition: opacity .4s var(--ease), transform .4s var(--ease), visibility .4s,
    background .3s, box-shadow .3s, border-color .3s;
  box-shadow: 0 12px 32px -10px #2f6bff33;
}

.back-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.back-top svg {
  width: 20px;
  height: 20px;
  transition: transform .3s var(--ease);
}

.back-top:hover {
  background: var(--volt);
  color: #fff;
  border-color: var(--volt);
  box-shadow: 0 16px 40px -10px #2f6bff88;
}

.back-top:hover svg {
  transform: translateY(-2px);
}

/* ---------- 6. 按钮涟漪效果 ---------- */
.btn-primary,
.btn-ghost,
.btn-outline,
.nav-cta {
  position: relative;
  overflow: hidden;
}

.ripple {
  position: absolute;
  border-radius: 50%;
  background: #ffffff55;
  transform: scale(0);
  animation: rippleAnim .6s ease-out forwards;
  pointer-events: none;
}

@keyframes rippleAnim {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* ---------- 7. Section 渐变过渡带 ---------- */
.sec::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: -1px;
  height: 60px;
  pointer-events: none;
  z-index: 1;
}

.problem::before {
  background: linear-gradient(180deg, var(--ink) 0%, transparent 100%);
}

.solution::before {
  background: linear-gradient(180deg, var(--paper) 0%, transparent 100%);
}

.codes::before {
  background: linear-gradient(180deg, var(--ink) 0%, transparent 100%);
}

.data::before {
  background: linear-gradient(180deg, var(--paper) 0%, transparent 100%);
}

.seeker::before {
  background: linear-gradient(180deg, var(--ink-2) 0%, transparent 100%);
}

/* ---------- 8. Hero 标题增强 ---------- */
.hero-title .line {
  text-shadow: 0 2px 20px #2f6bff18;
}

.hero-title .num {
  text-shadow: 0 0 24px #2f6bff44;
}

.hero-title .num.zero {
  text-shadow: 0 0 24px #ff547044;
}

/* ---------- 9. KPI / Panel 悬停光晕 ---------- */
.kpi {
  position: relative;
  overflow: hidden;
}

.kpi::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), #2f6bff15, transparent 40%);
  opacity: 0;
  transition: opacity .4s;
  pointer-events: none;
}

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

.panel {
  position: relative;
  overflow: hidden;
  transition: border-color .4s, transform .4s var(--ease);
}

.panel:hover {
  border-color: #00e5c035;
  transform: translateY(-3px);
}

.panel::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), #2f6bff10, transparent 50%);
  opacity: 0;
  transition: opacity .4s;
  pointer-events: none;
}

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

/* ---------- 10. 流动边框光（feat 卡片） ---------- */
.code-card.feat {
  position: relative;
}

.code-card.feat::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 21px;
  padding: 1px;
  background: linear-gradient(130deg, transparent 30%, #6d9aff88 50%, transparent 70%);
  background-size: 200% 200%;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity .5s;
  animation: borderFlow 4s linear infinite;
  pointer-events: none;
}

.code-card.feat.tilt-hover::before {
  opacity: 1;
}

@keyframes borderFlow {
  0% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }

  100% {
    background-position: 0% 50%;
  }
}

/* ---------- 11. 凭证卡悬浮增强 ---------- */
.cert {
  transition: transform .5s var(--ease), box-shadow .5s var(--ease);
}

.cert:hover {
  transform: translateY(-6px) rotate(-.5deg);
  box-shadow:
    0 50px 100px -36px #2f6bff44,
    0 40px 84px -32px #0a0c1666;
}

/* ---------- 12. 手机 mockup 光影增强 ---------- */
.phone {
  position: relative;
}

.phone::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 42px;
  background: linear-gradient(135deg, #ffffff18 0%, transparent 40%);
  pointer-events: none;
  z-index: 5;
}

/* ---------- 13. 滚动字幕增强 ---------- */
.marquee-track span {
  transition: color .3s;
}

.marquee-track span:hover {
  color: var(--volt);
}

/* ---------- 14. 解法步骤连接线 ---------- */
.flow-step {
  position: relative;
}

.flow-step::after {
  content: '';
  position: absolute;
  left: 30px;
  bottom: -1px;
  width: 2px;
  height: 0;
  background: linear-gradient(180deg, var(--volt), transparent);
  transition: height .6s var(--ease);
}

.flow-step.in-view::after {
  height: 100%;
}

.flow-step:last-child::after {
  display: none;
}

/* ---------- 15. 选中文字样式 ---------- */
::selection {
  background: #2f6bff33;
  color: var(--tx-dark);
}

/* ---------- 16. 滚动条美化 ---------- */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--ink);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--volt), var(--volt-dim));
  border-radius: 999px;
  border: 2px solid var(--ink);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--blue-soft), var(--volt));
}

/* ---------- 响应式兼容 ---------- */
@media (max-width: 900px) {
  .cursor-spotlight {
    display: none;
  }

  .code-card.tilt-hover,
  .prob.tilt-hover {
    transform: translateY(-6px);
  }
}

@media (prefers-reduced-motion: reduce) {

  .scroll-progress,
  .cursor-spotlight,
  .ripple,
  .code-card.feat::before {
    display: none !important;
  }

  .back-top {
    transition: none;
  }
}