/* ============================================================
   CWSE 乘物光能 · 官网样式
   Brand: #0C3E7B 深蓝 / #23C45D 活力绿 / 白 35% 呼吸
   Style ref: xnrgyclub.com — 编辑式大字号 + 编号章节 + 留白
   ============================================================ */

:root {
  --blue: #0C3E7B;
  --blue-2: #164985;
  --blue-deep: #0A2F60;
  --green: #23C45D;
  --mint: #E7F8E9;
  --purple: #6C4C98;
  --ink: #333333;
  --ink-2: #444444;
  --grey: #888888;
  --line: #E5E7EB;
  --bg: #F8F9FA;
  --white: #FFFFFF;
  --radius-btn: 8px;
  --radius-card: 12px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, .06);
  --shadow-btn: 0 4px 12px rgba(12, 62, 123, .15);
  --font-en: "Century Gothic", "Inter", sans-serif;
  --font-cn: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --nav-h: 72px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-cn);
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
section { scroll-margin-top: calc(var(--nav-h) + 20px); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ---------- 通用排版 ---------- */
.eyebrow {
  font-family: var(--font-en);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--blue);
  margin-bottom: 6px;
}
.eyebrow.light { color: rgba(255, 255, 255, .75); }
h2 {
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 900;
  color: var(--blue);
  line-height: 1.2;
  letter-spacing: .01em;
}
.section-head { margin-bottom: 56px; }
.section-head.center { text-align: center; }
.section-head .sub { color: var(--grey); font-size: 17px; margin-top: 10px; }
.sec-num {
  font-family: var(--font-en);
  font-size: clamp(56px, 7vw, 88px);
  font-weight: 800;
  line-height: 1;
  color: var(--blue);
  letter-spacing: -.03em;
  margin-bottom: 18px;
}
.sec-num span { font-size: .35em; color: var(--green); font-weight: 700; letter-spacing: 0; }
.sec-num.dark span { color: var(--blue); opacity: .4; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 48px; padding: 0 32px;
  border-radius: var(--radius-btn);
  font-weight: 700; font-size: 16px;
  cursor: pointer; border: none;
  transition: background .15s ease-in-out, transform .2s ease-out, box-shadow .2s ease-out;
}
.btn-primary { background: var(--blue); color: #fff; box-shadow: var(--shadow-btn); }
.btn-primary:hover { background: var(--blue-2); }
.btn-light { background: #fff; color: var(--blue); }
.btn-light:hover { background: var(--mint); transform: translateY(-2px); }
.btn-green { background: var(--green); color: #fff; width: 100%; }
.btn-green:hover { background: #1eb152; }
.btn-ghost-light { background: transparent; color: #fff; padding: 0 8px; }
.btn-ghost-light .arrow { transition: transform .2s ease-out; }
.btn-ghost-light:hover .arrow { transform: translateX(6px); }

/* ---------- 导航 ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--nav-h);
  transition: background .25s ease, box-shadow .25s ease;
}
.nav-inner {
  max-width: 1280px; margin: 0 auto; height: 100%;
  padding: 0 24px;
  display: flex; align-items: center; gap: 40px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-logo img { width: auto; object-fit: contain; }
.nav-logo img:not(.logo-dif) { height: 56px; }
.nav-logo img.logo-dif { height: 28px; }
.nav-logo .logo-x {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 28px; font-weight: 300; line-height: 1;
  color: #ffffff;
  opacity: .9;
  margin: 0 6px;
  min-width: 18px;
}
.nav.scrolled .logo-x { color: var(--blue); }
.nav-logo .logo-x.logo-color { display: none; }
.nav.scrolled .logo-x.logo-white { display: none; }
.nav.scrolled .logo-x.logo-color { display: inline-flex; }
.nav-logo .logo-color { display: none; }
.nav.scrolled { background: rgba(255, 255, 255, .92); backdrop-filter: blur(12px); box-shadow: 0 1px 0 var(--line); }
.nav.scrolled .logo-white { display: none; }
.nav.scrolled .logo-color { display: block; }
.nav.scrolled .nav-links a { color: var(--ink-2); }
.nav.scrolled .nav-links a:hover { color: var(--blue); }
.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a {
  font-size: 14px; font-weight: 500; color: rgba(255, 255, 255, .78);
  position: relative; padding: 9px 16px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(255, 255, 255, .06), rgba(255, 255, 255, .02));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, .1);
  transition: color .2s, background .2s, border-color .2s, transform .15s;
}
.nav-links a::before {
  content: ''; position: absolute; inset: 0;
  border-radius: inherit; opacity: 0;
  background: linear-gradient(135deg, rgba(35, 196, 93, .18), rgba(255, 255, 255, 0));
  transition: opacity .2s;
}
.nav-links a:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, .28);
  transform: translateY(-1px);
}
.nav-links a:hover::before { opacity: 1; }
.nav.scrolled .nav-links a {
  color: var(--ink-2);
  background: linear-gradient(135deg, rgba(12, 62, 123, .04), rgba(12, 62, 123, .01));
  border-color: rgba(12, 62, 123, .1);
}
.nav.scrolled .nav-links a::before {
  background: linear-gradient(135deg, rgba(12, 62, 123, .12), rgba(35, 196, 93, .06));
}
.nav.scrolled .nav-links a:hover {
  color: var(--blue);
  border-color: rgba(12, 62, 123, .22);
  transform: translateY(-1px);
}
.btn-nav { height: 40px; padding: 0 22px; font-size: 14px; background: #fff; color: var(--blue); box-shadow: none; }
.btn-nav:hover { background: var(--mint); }
.nav.scrolled .btn-nav { background: var(--blue); color: #fff; box-shadow: var(--shadow-btn); }
.nav.scrolled .btn-nav:hover { background: var(--blue-2); }
.nav-burger { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; padding: 8px; }
.nav-burger span { display: block; width: 22px; height: 2px; background: #fff; transition: .25s; }
.nav.scrolled .nav-burger span { background: var(--blue); }

/* ---------- 语言切换 ---------- */
.lang-switch {
  font-family: var(--font-en);
  font-size: 13px; font-weight: 600;
  color: rgba(255, 255, 255, .7);
  padding: 6px 14px;
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 20px;
  transition: background .15s, color .15s, border-color .15s;
  letter-spacing: .06em;
}
.lang-switch:hover { background: rgba(255, 255, 255, .1); color: #fff; border-color: rgba(255, 255, 255, .5); }
.nav.scrolled .lang-switch { color: var(--blue); border-color: var(--line); }
.nav.scrolled .lang-switch:hover { background: var(--blue); color: #fff; border-color: var(--blue); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center;
  background: linear-gradient(135deg, var(--blue-deep) 0%, var(--blue) 55%, var(--blue-2) 100%);
  color: #fff;
  overflow: hidden;
  padding: calc(var(--nav-h) + 60px) 0 40px;
}
.hero-map { position: absolute; inset: 0; opacity: .5; pointer-events: none; }
.hero-map svg { width: 100%; height: 100%; }
.hero-glow {
  position: absolute; right: -10%; top: -20%;
  width: 60vw; height: 60vw; border-radius: 50%;
  background: radial-gradient(circle, rgba(35, 196, 93, .18) 0%, transparent 60%);
  pointer-events: none;
}
.hero-tree {
  position: absolute; right: 4vw; bottom: -4%;
  height: 78vh; width: auto;
  filter: brightness(0) invert(1);
  opacity: .16;
  pointer-events: none;
  will-change: transform;
  animation: treeSpin 180s linear infinite;
}
@keyframes treeSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(2deg); }
}
@media (prefers-reduced-motion: reduce) { .hero-tree { animation: none; } }
.hero-inner { position: relative; max-width: 1200px; margin: 0 auto; padding: 0 24px; width: 100%; }
.hero-kicker {
  font-family: var(--font-en);
  font-size: clamp(13px, 1.4vw, 16px);
  font-weight: 500; letter-spacing: .12em; text-transform: uppercase;
  color: rgba(255, 255, 255, .65);
  margin-bottom: 28px;
}
.hero-title {
  font-size: clamp(40px, 7vw, 96px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: .01em;
}
.hero-title span { display: block; }
.hero-title .line { white-space: nowrap; }
.hero-title .accent { font-style: normal; color: var(--green); white-space: nowrap; }
.hero-slogan {
  margin-top: 30px;
  font-size: clamp(17px, 2vw, 22px);
  font-weight: 500;
  color: rgba(255, 255, 255, .85);
  letter-spacing: .06em;
}
.hero-ctas { display: flex; align-items: center; gap: 28px; margin-top: 44px; flex-wrap: wrap; }

.hero-data {
  position: relative;
  max-width: 1200px; width: 100%;
  margin: 80px auto 0; padding: 32px 24px 0;
  border-top: 1px solid rgba(255, 255, 255, .18);
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.hd-item strong {
  display: block;
  font-family: var(--font-en);
  font-size: clamp(26px, 3vw, 40px);
  font-weight: 800; letter-spacing: -.02em; line-height: 1.1;
}
.hd-item strong i { font-style: normal; font-size: .55em; font-weight: 700; margin-left: 2px; }
.hd-item .count { display: inline; font-size: inherit; color: inherit; margin: 0; }
.hd-item > span { display: block; margin-top: 6px; font-size: 13px; color: rgba(255, 255, 255, .6); }

.hero-scroll {
  position: absolute; bottom: 26px; right: 32px;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: rgba(255, 255, 255, .55);
  font-family: var(--font-en); font-size: 11px; letter-spacing: .14em; text-transform: uppercase;
  writing-mode: vertical-rl;
}
.hero-scroll svg { animation: bounce 1.8s infinite; }
@keyframes bounce { 0%,100% { transform: translateY(0); } 50% { transform: translateY(6px); } }

/* ---------- 价值主张 strip ---------- */
.value-strip { padding: 120px 0 100px; background: var(--white); }
.value-lead { font-size: clamp(17px, 1.8vw, 21px); color: var(--ink-2); max-width: 780px; margin-bottom: 64px; }
.value-lead strong { color: var(--blue); }
.value-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.value-item {
  border: 1px solid var(--line); border-radius: var(--radius-card);
  padding: 32px;
  transition: transform .2s ease-out, box-shadow .2s ease-out, border-color .2s;
  background: #fff;
}
.value-item:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(12, 62, 123, .12); border-color: var(--blue); }
.vi-icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: var(--mint); color: var(--green);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.vi-icon svg { width: 26px; height: 26px; }
.value-item h4 { font-size: 20px; color: var(--blue); margin-bottom: 10px; font-weight: 700; }
.value-item p { font-size: 15px; color: var(--ink-2); }

/* ---------- 分栏布局（sticky 侧栏） ---------- */
.split { display: grid; grid-template-columns: 380px 1fr; gap: 72px; align-items: start; }
.split-side { position: sticky; top: calc(var(--nav-h) + 40px); align-self: start; }
.split-side h2 { margin-bottom: 20px; font-size: clamp(28px, 3.2vw, 40px); word-break: keep-all; }
.side-note { color: var(--grey); font-size: 15px; margin-bottom: 28px; }

/* ---------- 01 时代背景 ---------- */
.why { padding: 120px 0; background: var(--bg); }
.rule-card {
  display: grid; grid-template-columns: 110px 1fr 190px; gap: 32px; align-items: center;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-card);
  padding: 36px;
  margin-bottom: 20px;
  transition: transform .2s ease-out, box-shadow .2s ease-out;
}
.rule-card:hover { transform: translateY(-4px) scale(1.008); box-shadow: var(--shadow-card); }
.rule-index {
  font-family: var(--font-en); font-weight: 700; font-size: 13px;
  letter-spacing: .08em; color: var(--green);
  text-transform: uppercase;
}
.rule-body h3 { font-size: 22px; color: var(--blue); margin-bottom: 8px; }
.rule-body p { font-size: 15px; color: var(--ink-2); }
.rule-body strong { color: var(--blue); }
.rule-data { text-align: right; border-left: 1px solid var(--line); padding-left: 28px; }
.rule-data strong {
  display: block; font-family: var(--font-en);
  font-size: 38px; font-weight: 800; letter-spacing: -.03em; color: var(--blue); line-height: 1;
}
.rule-data strong span { font-size: .6em; }
.rule-data > span { font-size: 12px; color: var(--grey); }

/* ---------- 02 绊脚石 ---------- */
.obstacles { padding: 120px 0; background: var(--mint); }
.obs-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.obs-card {
  position: relative; background: #fff; border-radius: var(--radius-card);
  padding: 40px 32px 32px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform .2s ease-out, box-shadow .2s ease-out;
}
.obs-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(12, 62, 123, .12); }
.obs-num {
  position: absolute; top: 14px; right: 20px;
  font-family: var(--font-en); font-size: 64px; font-weight: 800;
  color: var(--blue); opacity: .07; letter-spacing: -.03em;
}
.obs-card h3 { font-size: 22px; color: var(--blue); margin-bottom: 12px; }
.obs-card > p { font-size: 15px; color: var(--ink-2); min-height: 78px; }
.obs-card strong { color: #d9534f; }
.obs-meter { margin-top: 24px; }
.obs-meter i {
  display: block; height: 6px; width: var(--v, 50%);
  background: linear-gradient(90deg, var(--blue), var(--green));
  border-radius: 3px;
  transform-origin: left;
}
.obs-meter span { display: block; margin-top: 10px; font-size: 12px; color: var(--grey); letter-spacing: .04em; }

/* ---------- 03 服务模块 ---------- */
.modules { padding: 120px 0 120px; background: var(--white); }
.module-list { display: flex; flex-direction: column; gap: 28px; }
.module {
  position: sticky;
  top: calc(var(--nav-h) + 28px);
  border: 1px solid var(--line); border-radius: var(--radius-card);
  padding: 44px;
  background: #fff;
  box-shadow: 0 4px 24px rgba(0, 0, 0, .04);
  transition: border-color .2s, box-shadow .25s ease-out, transform .25s ease-out;
  z-index: 1;
}
.module + .module { margin-top: 0; }
/* 4 张卡错位堆叠：第 2 张起 top 值减小，让它能"压"在上一张上面 */
.module:nth-child(1) { z-index: 1; top: calc(var(--nav-h) + 28px); }
.module:nth-child(2) { z-index: 2; top: calc(var(--nav-h) + 56px); }
.module:nth-child(3) { z-index: 3; top: calc(var(--nav-h) + 84px); }
.module:nth-child(4) { z-index: 4; top: calc(var(--nav-h) + 112px); }
.module:hover { border-color: var(--blue); box-shadow: 0 8px 24px rgba(12, 62, 123, .12); transform: translateY(-4px) scale(1.008); }
.mod-head { display: flex; gap: 24px; align-items: flex-start; margin-bottom: 18px; }
.mod-num {
  font-family: var(--font-en); font-size: 56px; font-weight: 800;
  color: var(--green); line-height: 1; letter-spacing: -.03em;
}
.mod-en { font-family: var(--font-en); font-size: 13.5px; font-weight: 500; color: var(--grey); letter-spacing: .03em; }
.mod-head h3 { font-size: clamp(22px, 2.4vw, 28px); color: var(--blue); font-weight: 900; line-height: 1.3; }
.mod-desc { color: var(--ink-2); font-size: 15.5px; margin-bottom: 28px; max-width: 720px; }
.mod-body { display: grid; grid-template-columns: 1fr 250px; gap: 32px; align-items: start; }
.mod-caps li {
  position: relative; padding: 14px 0 14px 22px;
  border-bottom: 1px dashed var(--line);
  font-size: 14.5px; color: var(--ink-2);
}
.mod-caps li:last-child { border-bottom: none; }
.mod-caps li::before {
  content: ""; position: absolute; left: 0; top: 24px;
  width: 8px; height: 8px; border-radius: 50%; background: var(--green);
}
.mod-caps strong { display: block; color: var(--blue); font-size: 15.5px; margin-bottom: 2px; }
.mod-photo img {
  border-radius: var(--radius-card);
  aspect-ratio: 4 / 3.4; object-fit: cover; width: 100%;
}
.mod-steps { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.mod-steps > div {
  background: var(--mint); border-radius: var(--radius-card); padding: 22px;
}
.mod-steps i {
  font-family: var(--font-en); font-style: normal; font-weight: 800;
  color: var(--green); font-size: 13px; letter-spacing: .06em;
}
.mod-steps strong { display: block; color: var(--blue); font-size: 16px; margin: 4px 0 6px; }
.mod-steps p { font-size: 13.5px; color: var(--ink-2); }
.mod-data {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
  margin-top: 32px; padding-top: 28px;
  border-top: 1px solid var(--line);
}
.mod-data > div {
  border-left: 3px solid var(--green);
  background: var(--bg);
  border-radius: 0 8px 8px 0;
  padding: 16px 18px;
}
.mod-data strong {
  display: block; font-family: var(--font-en);
  font-size: 30px; font-weight: 800; letter-spacing: -.02em; color: var(--blue); line-height: 1.1;
}
.mod-data span { font-size: 12.5px; color: var(--grey); }

/* ---------- 04 关键数据 ---------- */
.data {
  position: relative;
  padding: 130px 0;
  background: linear-gradient(160deg, var(--blue-deep), var(--blue) 60%, var(--blue-2));
  color: #fff;
  overflow: hidden;
}
.data-bg {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: .14;
  mix-blend-mode: luminosity;
}
.data .container { position: relative; }
.data h2 { color: #fff; }
.data-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.data-card {
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: var(--radius-card);
  padding: 36px 28px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform .25s cubic-bezier(.2,.7,.2,1), background .2s, border-color .2s;
}
.data-card:hover { transform: translateY(-6px) scale(1.01); background: rgba(255, 255, 255, .14); border-color: rgba(255, 255, 255, .28); }
.data-card::after {
  content: '';
  display: block;
  width: 40px; height: 2px; border-radius: 1px;
  background: var(--green);
  margin-top: 20px;
}
.dc-label {
  display: inline-block; font-size: 11px; font-weight: 500; text-transform: uppercase;
  color: rgba(255, 255, 255, .6); letter-spacing: .08em; margin-bottom: 14px;
}
.data-card strong {
  display: block; font-family: var(--font-en);
  font-size: clamp(42px, 4.5vw, 60px); font-weight: 800; letter-spacing: -.03em; line-height: 1;
  margin-bottom: 10px;
}
.data-card strong i { font-style: normal; font-size: .35em; font-weight: 500; opacity: .6; }
.data-card p { font-size: 13.5px; color: rgba(255, 255, 255, .58); line-height: 1.6; }

/* ---------- 05 服务流程 ---------- */
.process { padding: 120px 0; background: var(--white); }
.proc-line {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 0;
  counter-reset: step;
  position: relative;
}
.proc-line::before {
  content: ""; position: absolute; top: 27px; left: 4%; right: 4%;
  height: 2px; background: repeating-linear-gradient(90deg, var(--line) 0 8px, transparent 8px 16px);
}
.proc-line li { position: relative; text-align: center; padding: 0 10px; }
.proc-line i {
  display: flex; align-items: center; justify-content: center;
  width: 54px; height: 54px; margin: 0 auto 18px;
  border-radius: 50%; background: var(--mint);
  font-family: var(--font-en); font-style: normal; font-weight: 800; font-size: 15px;
  color: var(--blue);
  border: 2px solid #fff; box-shadow: 0 0 0 2px var(--mint);
  position: relative; z-index: 1;
  transition: background .2s, color .2s, transform .2s ease-out;
}
.proc-line li:hover i { background: var(--blue); color: #fff; transform: scale(1.08); }
.proc-line li.active i { background: var(--blue); color: #fff; transform: scale(1.06); box-shadow: 0 0 0 4px rgba(12, 62, 123, .15); }
.proc-line li.done i { background: var(--green); color: #fff; border-color: var(--green); box-shadow: 0 0 0 2px rgba(35, 196, 93, .25); }
.proc-line li.done::after { width: 100%; background: var(--green); }
.proc-line strong { display: block; color: var(--blue); font-size: 16.5px; margin-bottom: 6px; }
.proc-line p { font-size: 12.5px; color: var(--grey); line-height: 1.6; }

/* ---------- 障碍区串联 ---------- */
.obstacles { padding: 80px 0; background: var(--bg); }
.obs-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0;
  margin-top: 40px;
}
.obs-item {
  text-align: center; position: relative; padding: 0 28px 40px;
}
.obs-item + .obs-item::before {
  content: '→';
  position: absolute; left: -14px; top: 28px;
  font-size: 18px; color: var(--line); font-family: var(--font-en);
}
.obs-num {
  width: 56px; height: 56px; border-radius: 50%; margin: 0 auto 18px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-en); font-size: 22px; font-weight: 800;
}
.obs-item:nth-child(1) .obs-num { background: rgba(35, 196, 93, .12); color: var(--green); }
.obs-item:nth-child(2) .obs-num { background: rgba(245, 158, 11, .12); color: var(--amber); }
.obs-item:nth-child(3) .obs-num { background: rgba(239, 68, 68, .12); color: var(--red); }

/* ---------- 06 核心优势 ---------- */
.advantages { padding: 120px 0; background: var(--bg); }
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 64px; }
.adv-card {
  background: #fff; border-radius: var(--radius-card);
  padding: 40px 32px;
  border: 1px solid var(--line);
  transition: transform .2s ease-out, box-shadow .2s ease-out, border-color .2s;
}
.adv-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(12, 62, 123, .12); border-color: var(--blue); }
.adv-num {
  font-family: var(--font-en); font-size: 15px; font-weight: 800;
  color: var(--green); letter-spacing: .1em;
  display: block; margin-bottom: 18px;
}
.adv-card h3 { font-size: 21px; color: var(--blue); margin-bottom: 12px; }
.adv-card > p { font-size: 14.5px; color: var(--ink-2); }
.adv-value {
  margin-top: 18px; padding-top: 16px;
  border-top: 1px dashed var(--line);
  font-size: 13.5px !important; color: var(--green) !important; font-weight: 500;
}
.cobrand {
  position: relative; border-radius: 16px; overflow: hidden;
  background: linear-gradient(120deg, var(--blue-deep), var(--blue));
  padding: 72px 48px;
  text-align: center; color: #fff;
}
.cobrand-bg {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: .16; mix-blend-mode: luminosity;
}
.cobrand-inner { position: relative; }
.cobrand-logos { display: flex; align-items: center; justify-content: center; gap: 20px; margin-bottom: 24px; }
.cobrand-logos img { width: auto; object-fit: contain; }
.cobrand-logos img:not(.logo-dif) { height: 72px; }
.cobrand-logos img.logo-dif { height: 36px; }
.cobrand-x { font-size: 28px; font-weight: 300; opacity: .5; }
.cobrand-logo { height: 56px; width: auto; margin: 0 auto 24px; }
.cobrand h3 { font-size: clamp(24px, 3vw, 34px); font-weight: 900; margin-bottom: 12px; }
.cobrand p { color: rgba(255, 255, 255, .8); font-size: 16px; letter-spacing: .06em; }

/* ---------- 07 Footer / 联系 ---------- */
.footer {
  background: linear-gradient(180deg, var(--blue-deep), #071f42);
  color: #fff;
  padding: 110px 0 40px;
}
.foot-cta { text-align: center; margin-bottom: 80px; }
.foot-cta h2 { color: #fff; font-size: clamp(34px, 5vw, 60px); line-height: 1.25; }
.foot-cta h2 span { color: var(--green); }
.foot-grid { display: grid; grid-template-columns: 1.25fr 1fr; gap: 48px; margin-bottom: 80px; }
.foot-form, .foot-info {
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 16px; padding: 40px;
}
.foot-form h4, .foot-info h4 { font-size: 20px; margin-bottom: 8px; }
.foot-form > p { font-size: 14px; color: rgba(255, 255, 255, .6); margin-bottom: 24px; }
.frow { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px; }
.foot-form input, .foot-form textarea {
  width: 100%; padding: 13px 16px;
  border-radius: var(--radius-btn);
  border: 1px solid rgba(255, 255, 255, .18);
  background: rgba(255, 255, 255, .07);
  color: #fff; font-size: 14.5px; font-family: inherit;
  transition: border-color .15s, box-shadow .15s;
  margin-bottom: 14px; resize: vertical;
}
.foot-form input::placeholder, .foot-form textarea::placeholder { color: rgba(255, 255, 255, .4); }
.foot-form input:focus, .foot-form textarea:focus {
  outline: none; border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(35, 196, 93, .2);
}
.f-hint { font-size: 12px; color: rgba(255, 255, 255, .45); margin-top: 12px; text-align: center; }
.contact-list li {
  display: flex; gap: 18px; align-items: baseline;
  padding: 14px 0; border-bottom: 1px dashed rgba(255, 255, 255, .14);
  font-size: 16px;
}
.contact-list li span {
  flex: 0 0 44px; font-size: 13px; color: rgba(255, 255, 255, .5); letter-spacing: .1em;
}
.contact-list a:hover { color: var(--green); }
.foot-qr { display: flex; align-items: center; gap: 16px; margin-top: 26px; }
.foot-qr img { width: 96px; height: auto; border-radius: 8px; background: #fff; padding: 6px; }
.foot-qr span { font-size: 13px; color: rgba(255, 255, 255, .6); }
.foot-nav {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
  margin-bottom: 60px; padding-top: 60px;
  border-top: 1px solid rgba(255, 255, 255, .08);
}
.foot-nav h4 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 14px; }
.foot-nav a {
  display: block; color: rgba(255, 255, 255, .5); font-size: 13.5px; text-decoration: none;
  padding: 4px 0; transition: color .15s;
}
.foot-nav a:hover { color: rgba(255, 255, 255, .85); }
.foot-bottom {
  border-top: 1px solid rgba(255, 255, 255, .12);
  padding-top: 32px;
  display: flex; align-items: center; gap: 28px; flex-wrap: wrap;
}
.foot-logos { display: flex; align-items: center; gap: 16px; }
.foot-logo { height: 48px; width: auto; object-fit: contain; }
.foot-logo-dif { height: 24px; width: auto; opacity: .9; object-fit: contain; }
.foot-x {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 300; line-height: 1;
  color: #ffffff;
  opacity: .7;
  margin: 0 4px;
}
.foot-names { font-size: 13px; color: rgba(255, 255, 255, .65); }
.foot-names em { font-style: normal; font-family: var(--font-en); opacity: .7; margin-left: 8px; }
.copyright { margin-left: auto; font-size: 12px; color: rgba(255, 255, 255, .4); }

/* ---------- 表单确认弹窗 ---------- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 999;
  background: rgba(0, 0, 0, .6);
  backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.modal-overlay[hidden] { display: none; }
.modal-card {
  background: #fff; border-radius: var(--radius-card);
  padding: 40px; max-width: 480px; width: 100%;
  box-shadow: 0 24px 80px rgba(0, 0, 0, .25);
}
.modal-card h3 { font-size: 22px; margin-bottom: 6px; color: var(--blue); }
.modal-sub { font-size: 14px; color: var(--grey); margin-bottom: 24px; }
.modal-preview {
  list-style: none; padding: 0; margin: 0 0 24px;
  background: var(--bg); border-radius: var(--radius-md); padding: 16px 20px;
}
.modal-preview li { font-size: 14px; padding: 6px 0; border-bottom: 1px solid var(--line); }
.modal-preview li:last-child { border: 0; }
.modal-preview li b { color: var(--blue); font-weight: 500; display: inline-block; width: 56px; }
.modal-actions { display: flex; gap: 12px; }
.btn-ghost { background: transparent; color: var(--grey); border: 1px solid var(--line); font-size: 15px; }
.btn-ghost:hover { background: var(--bg); color: var(--ink-2); }

/* ---------- 滚动渐显 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease-out, transform .7s ease-out; }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }
.reveal.d4 { transition-delay: .32s; }
.reveal.d5 { transition-delay: .4s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-scroll svg { animation: none; }
  * { transition-duration: .01ms !important; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split-side { position: static; }
  .data-grid { grid-template-columns: repeat(2, 1fr); }
  .proc-line { grid-template-columns: repeat(3, 1fr); gap: 32px 0; }
  .proc-line::before { display: none; }
  .hero-tree { opacity: .1; height: 60vh; }
}
@media (max-width: 768px) {
  .nav-links, .btn-nav { display: none; }
  .nav-burger { display: flex; }
  .nav.open .nav-links {
    display: flex; position: absolute; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: #fff; padding: 12px 24px 20px;
    box-shadow: 0 16px 32px rgba(0, 0, 0, .1);
  }
  .nav.open .nav-links a { color: var(--ink-2); padding: 14px 0; border-bottom: 1px solid var(--line); }
  .hero { padding-top: calc(var(--nav-h) + 40px); }
  .hero-title { font-size: 38px; }
  .hero-data { grid-template-columns: repeat(2, 1fr); margin-top: 56px; }
  .hd-item strong { white-space: nowrap; font-size: 26px; }
  .hero-scroll { display: none; }
  .value-grid, .obs-grid, .adv-grid, .foot-grid, .mod-body, .mod-steps { grid-template-columns: 1fr; }
  .rule-card { grid-template-columns: 1fr; gap: 16px; padding: 28px; }
  .rule-data { text-align: left; border-left: none; padding-left: 0; border-top: 1px solid var(--line); padding-top: 16px; }
  .module { padding: 28px 22px; }
  .mod-head { gap: 16px; }
  .mod-num { font-size: 40px; }
  .mod-data { grid-template-columns: 1fr; }
  .data-grid { grid-template-columns: 1fr; }
  .proc-line { grid-template-columns: repeat(2, 1fr); }
  .frow { grid-template-columns: 1fr; gap: 0; }
  .foot-form, .foot-info { padding: 28px 22px; }
  .cobrand { padding: 48px 24px; }
  .value-strip, .why, .obstacles, .modules, .process, .advantages { padding: 72px 0; }
  .data { padding: 80px 0; }
  .copyright { margin-left: 0; }
}

/* ============================================================
   ENHANCEMENTS · 加载幕布 / 滚动进度条 / 回顶 / Hero 字符 / 表单
   ============================================================ */

/* ---- 加载幕布 ---- */
.intro-curtain {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--blue);
  display: flex; align-items: center; justify-content: center;
  transition: opacity .6s ease, visibility .6s;
}
.intro-curtain::after {
  content: ''; position: absolute; left: 50%; bottom: 12vh;
  width: 80px; height: 3px;
  background: rgba(255, 255, 255, .12);
  border-radius: 2px; overflow: hidden;
  transform: translateX(-50%);
}
.intro-curtain::before {
  content: ''; position: absolute; left: 50%; bottom: 12vh;
  width: 80px; height: 3px;
  background: var(--green);
  border-radius: 2px;
  transform: translateX(-50%);
  animation: introBar 1.1s ease-out forwards;
}
@keyframes introBar {
  0% { transform: translateX(-90px); }
  100% { transform: translateX(-50%); }
}
.intro-curtain .intro-logo {
  color: #fff; font-family: var(--font-en);
  font-weight: 800; font-size: 32px;
  letter-spacing: .08em;
  opacity: 0; transform: translateY(8px);
  animation: introLogo .8s ease-out forwards;
}
@keyframes introLogo { to { opacity: 1; transform: translateY(0); } }
html:not(.ready) body { overflow: hidden; }
html:not(.ready) .intro-curtain { opacity: 1; visibility: visible; }
html.ready .intro-curtain { opacity: 0; visibility: hidden; pointer-events: none; }

/* ---- 滚动进度条 ---- */
.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0;
  height: 3px;
  background: transparent;
  z-index: 100;
  pointer-events: none;
}
.scroll-progress-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--blue), var(--green));
  transition: width .08s linear;
  box-shadow: 0 1px 4px rgba(35, 196, 93, .4);
}
.nav.scrolled ~ .scroll-progress-fill,
.scroll-progress-fill { /* keep visible */ }

/* ---- 回到顶部 ---- */
.back-top {
  position: fixed; right: 28px; bottom: 28px;
  width: 48px; height: 48px;
  background: var(--blue); color: #fff;
  border: none; border-radius: 50%;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 24px rgba(12, 62, 123, .35);
  opacity: 0; visibility: hidden;
  transform: translateY(20px);
  transition: opacity .25s, transform .25s, background .2s;
  z-index: 90;
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--blue-2); transform: translateY(-3px); }
.back-top svg { display: block; }

/* ---- Hero 标题字符逐字 reveal ---- */
.hero-title { display: block; }
.hero-title.split-ready { white-space: normal; }
.hero-title.split-ready .line { display: block; }
.hero-title.split-ready .ch {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.5em) rotateX(-30deg);
  animation: chIn .8s cubic-bezier(.2,.7,.2,1) forwards;
}
.hero-title.split-ready .ch-space {
  display: inline-block;
  white-space: pre;
  opacity: 0;
  animation: chIn .5s cubic-bezier(.2,.7,.2,1) forwards;
  width: 0.3em; /* ensure visible word spacing */
}
@keyframes chIn {
  0% { opacity: 0; transform: translateY(.5em) rotateX(-30deg); }
  100% { opacity: 1; transform: translateY(0) rotateX(0); }
}
/* 每个字符错开 0.04s，前 30 个 */
.hero-title.split-ready .ch:nth-child(1) { animation-delay: .05s; }
.hero-title.split-ready .ch:nth-child(2) { animation-delay: .09s; }
.hero-title.split-ready .ch:nth-child(3) { animation-delay: .13s; }
.hero-title.split-ready .ch:nth-child(4) { animation-delay: .17s; }
.hero-title.split-ready .ch:nth-child(5) { animation-delay: .21s; }
.hero-title.split-ready .ch:nth-child(6) { animation-delay: .25s; }
.hero-title.split-ready .ch:nth-child(7) { animation-delay: .29s; }
.hero-title.split-ready .ch:nth-child(8) { animation-delay: .33s; }
.hero-title.split-ready .ch:nth-child(9) { animation-delay: .37s; }
.hero-title.split-ready .ch:nth-child(10) { animation-delay: .41s; }
.hero-title.split-ready .ch:nth-child(11) { animation-delay: .45s; }
.hero-title.split-ready .ch:nth-child(12) { animation-delay: .49s; }
.hero-title.split-ready .ch:nth-child(13) { animation-delay: .53s; }
.hero-title.split-ready .ch:nth-child(14) { animation-delay: .57s; }
.hero-title.split-ready .ch:nth-child(15) { animation-delay: .61s; }
.hero-title.split-ready .ch:nth-child(16) { animation-delay: .65s; }
.hero-title.split-ready .ch:nth-child(17) { animation-delay: .69s; }
.hero-title.split-ready .ch:nth-child(18) { animation-delay: .73s; }
.hero-title.split-ready .ch:nth-child(19) { animation-delay: .77s; }
.hero-title.split-ready .ch:nth-child(20) { animation-delay: .81s; }
.hero-title.split-ready .ch:nth-child(n+21) { animation-delay: .85s; }

/* ---- Hero 副标题 / 数据带延迟入场 ---- */
html.ready .hero-kicker,
html.ready .hero-slogan,
html.ready .hero-ctas,
html.ready .hero-data {
  opacity: 0;
  animation: fadeUp .7s cubic-bezier(.2,.7,.2,1) forwards;
}
html.ready .hero-kicker { animation-delay: .55s; }
html.ready .hero-title { animation-delay: 0; }
html.ready .hero-slogan { animation-delay: .85s; }
html.ready .hero-ctas { animation-delay: 1.05s; }
html.ready .hero-data { animation-delay: 1.25s; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- 表单提交状态 ---- */
.f-status {
  margin-top: 14px;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  animation: fadeUp .3s ease-out;
}
.f-status.ok {
  background: rgba(35, 196, 93, .12);
  color: #1a8a3e;
  border: 1px solid rgba(35, 196, 93, .3);
}
.f-status.err {
  background: rgba(216, 58, 58, .1);
  color: #b32424;
  border: 1px solid rgba(216, 58, 58, .25);
}
.f-status.info {
  background: rgba(29, 95, 176, .1);
  color: var(--blue);
  border: 1px solid rgba(29, 95, 176, .2);
}

/* ---- 卡片 hover 光晕 ---- */
.card {
  position: relative;
  transition: transform .25s, box-shadow .25s;
}
.card::before {
  content: '';
  position: absolute; inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(35, 196, 93, .35), rgba(29, 95, 176, .15) 40%, transparent 70%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  opacity: 0;
  transition: opacity .3s;
  pointer-events: none;
}
.card:hover::before { opacity: 1; }

/* ---- 模块卡数字闪烁强调 ---- */
.m-card .mod-num {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-2) 100%);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---- 减少动效用户降级 ---- */
@media (prefers-reduced-motion: reduce) {
  html.ready .hero-kicker,
  html.ready .hero-slogan,
  html.ready .hero-ctas,
  html.ready .hero-data,
  .hero-title.split-ready .ch,
  .hero-title.split-ready .ch-space {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  .scroll-progress { display: none; }
  .back-top { display: none; }
  .intro-curtain { display: none; }
}

/* ---- 移动端微调 ---- */
@media (max-width: 720px) {
  .back-top { right: 16px; bottom: 16px; width: 42px; height: 42px; }
  .intro-logo { font-size: 24px; }
}