/* ===================================================================
   壬合科技 v0.2 · Apple Liquid Glass + Bento
   X 方向: Hero 极简 + 第二屏 bento 网格
   仅作用于 .v2-* 命名空间,不影响 v0.1
=================================================================== */

:root {
  --r-blue: #0066FF;
  --r-blue-deep: #0543F4;
  --r-blue-hover: #0052CC;
  --r-aqua: #00C8E6;
  --r-mint: #42E0C4;
  --r-lime: #B6F000;
  --r-mist: #EEF2F7;
  --r-bg-soft: #F7F9FC;

  --r-black: #0A0A0A;
  --r-title: #1A1A1A;
  --r-body: #333333;
  --r-muted: #666666;
  --r-subtle: #999999;
  --r-line: #E5E5E5;

  --font-cn: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-en: "Inter", system-ui, -apple-system, sans-serif;

  --tx: cubic-bezier(0.4, 0, 0.2, 1);
  --tx-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

*, *::before, *::after { box-sizing: border-box; }

.v2-body {
  margin: 0;
  font-family: var(--font-cn);
  color: var(--r-body);
  background: #FBFCFE;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
}

/* 全局流体背景层 - 由 .v2-hero-bg fixed 实现,无 ::before */

/* 把 main 内容浮于背景之上 */
.v2-header,
.v2-hero,
.v2-bento-section,
.v2-section,
.v2-footer {
  position: relative;
  }

.v2-body img { max-width: 100%; height: auto; display: block; }
.v2-body a { text-decoration: none; transition: color 0.2s var(--tx); color: inherit; }

.v2-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

::selection { background: var(--r-blue); color: #fff; }

/* ───────── 顶部导航 ───────── */
.v2-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: padding 0.3s var(--tx), background 0.3s var(--tx);
}

.v2-header.is-scrolled {
  padding: 10px 0;
  background: rgba(251, 252, 254, 0.78);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  box-shadow: 0 1px 0 rgba(10, 10, 10, 0.04);
}

.v2-nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.v2-brand {
  display: flex; align-items: center; gap: 10px;
  flex-shrink: 0;
}
.v2-brand-mark { width: 38px; height: 28px; }
.v2-brand-text { display: flex; flex-direction: column; gap: 3px; }
.v2-brand-text span { font-size: 15.5px; font-weight: 700; color: var(--r-black); letter-spacing: 0.04em; line-height: 1; }
.v2-brand-text small { font-family: var(--font-en); font-size: 9.5px; font-weight: 600; color: var(--r-muted); letter-spacing: 0.22em; line-height: 1; }

.v2-primary {
  display: flex; gap: 4px;
}
.v2-body .v2-primary > a {
  font-size: 14px;
  font-weight: 500;
  color: var(--r-body);
  padding: 8px 14px;
  border-radius: 8px;
  transition: all 0.2s var(--tx);
}
.v2-body .v2-primary > a:hover {
  color: var(--r-blue);
  background: rgba(0, 102, 255, 0.06);
}

.v2-body .v2-cta-btn {
  background: var(--r-blue);
  color: #ffffff;
  padding: 9px 20px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 500;
  transition: all 0.2s var(--tx);
  box-shadow: 0 4px 14px rgba(0, 102, 255, 0.28);
}
.v2-body .v2-cta-btn:hover {
  background: var(--r-blue-hover);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 8px 22px rgba(0, 102, 255, 0.35);
}

/* ───────── Hero (X 方向: 极简) ───────── */
.v2-hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  padding: 120px 24px 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* 极光流体背景 (fixed 跨整页,所有页面共用) */
.v2-hero-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}

.v2-aurora {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  will-change: transform;
  --py: 0px;
}
.v2-aurora--1 {
  width: 880px; height: 880px;
  top: -200px; left: -160px;
  background: radial-gradient(circle, rgba(0, 102, 255, 0.42), transparent 65%);
  animation: v2-aurora 28s ease-in-out infinite;
  transform: translateY(var(--py));
}
.v2-aurora--2 {
  width: 760px; height: 760px;
  top: 25%; right: -180px;
  background: radial-gradient(circle, rgba(0, 200, 230, 0.5), transparent 65%);
  animation: v2-aurora 34s ease-in-out infinite reverse;
  transform: translateY(var(--py));
}
.v2-aurora--3 {
  width: 640px; height: 640px;
  bottom: -160px; left: 35%;
  background: radial-gradient(circle, rgba(66, 224, 196, 0.4), transparent 65%);
  animation: v2-aurora 30s ease-in-out infinite;
  transform: translateY(var(--py));
}
.v2-aurora--4 {
  width: 380px; height: 380px;
  top: 22%; left: 38%;
  background: radial-gradient(circle, rgba(182, 240, 0, 0.18), transparent 65%);
  animation: v2-aurora 36s ease-in-out infinite reverse;
  transform: translateY(var(--py));
}

@keyframes v2-aurora {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(60px, -70px) scale(1.08); }
  66% { transform: translate(-50px, 50px) scale(0.95); }
}

.v2-flow {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  opacity: 0.85;
}
/* 沿 path 运动的发光粒子 */
.v2-flow-particle {
  filter: drop-shadow(0 0 8px currentColor) drop-shadow(0 0 16px currentColor);
}
/* 浮动小光球(背景错落动效) */
.v2-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
  will-change: transform;
}
.v2-orb--a {
  width: 220px; height: 220px;
  top: 28%; left: 18%;
  background: radial-gradient(circle, rgba(0, 102, 255, 0.55), transparent 65%);
  animation: v2-orb-drift 18s ease-in-out infinite;
}
.v2-orb--b {
  width: 160px; height: 160px;
  top: 65%; right: 22%;
  background: radial-gradient(circle, rgba(66, 224, 196, 0.55), transparent 65%);
  animation: v2-orb-drift 24s ease-in-out infinite reverse;
}
.v2-orb--c {
  width: 130px; height: 130px;
  top: 12%; right: 30%;
  background: radial-gradient(circle, rgba(0, 200, 230, 0.5), transparent 65%);
  animation: v2-orb-drift 20s ease-in-out infinite;
}
.v2-orb--d {
  width: 90px; height: 90px;
  bottom: 18%; left: 35%;
  background: radial-gradient(circle, rgba(182, 240, 0, 0.32), transparent 65%);
  animation: v2-orb-drift 26s ease-in-out infinite reverse;
}
@keyframes v2-orb-drift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(80px, -50px) scale(1.08); }
  50% { transform: translate(-40px, 60px) scale(0.95); }
  75% { transform: translate(60px, 40px) scale(1.04); }
}
.v2-flow-path {
  stroke-dasharray: 1200 800;
  animation: v2-flow-anim 22s linear infinite;
}
.v2-flow-path--2 { animation-duration: 28s; animation-direction: reverse; }
.v2-flow-path--3 { animation-duration: 36s; }

@keyframes v2-flow-anim {
  0% { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: -2000; }
}

/* Hero 内容 */
.v2-hero-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 880px;
  margin: 0 auto;
}

.v2-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(12px) saturate(160%);
  -webkit-backdrop-filter: blur(12px) saturate(160%);
  border: 1px solid rgba(0, 102, 255, 0.14);
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--r-blue);
  letter-spacing: 0.18em;
  margin-bottom: 36px;
  font-family: var(--font-en);
  text-transform: uppercase;
  box-shadow: 0 4px 16px rgba(10, 30, 80, 0.04);
  animation: v2-fadeup 0.9s var(--tx) backwards;
}
.v2-tag-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--r-blue);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.18);
  animation: v2-pulse 2.4s ease-in-out infinite;
}
@keyframes v2-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.18); }
  50% { opacity: 0.5; box-shadow: 0 0 0 6px rgba(0, 102, 255, 0.06); }
}

.v2-hero-title {
  font-size: clamp(48px, 7vw, 96px);
  line-height: 1.04;
  font-weight: 800;
  letter-spacing: -0.035em;
  color: var(--r-black);
  margin: 0 0 28px;
}
.v2-hero-title .v2-line {
  display: block;
  animation: v2-fadeup 1s var(--tx) backwards;
}
.v2-hero-title .v2-line:nth-child(1) { animation-delay: 0.1s; }
.v2-hero-title .v2-line:nth-child(2) { animation-delay: 0.25s; }
.v2-line--gradient {
  background: linear-gradient(135deg, var(--r-blue) 0%, var(--r-aqua) 45%, var(--r-mint) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.v2-hero-sub {
  font-size: clamp(19px, 1.5vw, 22px);
  line-height: 1.55;
  color: var(--r-muted);
  margin: 0 auto 14px;
  max-width: 640px;
  font-weight: 400;
  animation: v2-fadeup 1s var(--tx) 0.4s backwards;
}

.v2-hero-rhythm {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 22px;
  font-family: var(--font-en), var(--font-cn);
  font-size: 14px;
  font-weight: 500;
  color: var(--r-subtle);
  margin: 0 0 56px;
  letter-spacing: 0.02em;
  animation: v2-fadeup 1s var(--tx) 0.55s backwards;
}
.v2-hero-rhythm span {
  display: inline-block;
  position: relative;
}
.v2-hero-rhythm span:not(:last-child)::after {
  content: "·";
  margin-left: 22px;
  color: rgba(102, 102, 102, 0.35);
  position: absolute;
  right: -16px;
  top: 0;
}

.v2-hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  animation: v2-fadeup 1s var(--tx) 0.7s backwards;
}

.v2-body .v2-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 32px;
  font-size: 15.5px;
  font-weight: 500;
  border-radius: 999px;
  transition: all 0.25s var(--tx);
  white-space: nowrap;
}
.v2-body .v2-btn--primary {
  background: var(--r-blue);
  color: #ffffff;
  box-shadow: 0 8px 24px rgba(0, 102, 255, 0.28);
}
.v2-body .v2-btn--primary:hover {
  background: var(--r-blue-hover);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(0, 102, 255, 0.38);
}
.v2-body .v2-btn--ghost {
  background: rgba(255, 255, 255, 0.6);
  color: var(--r-black);
  backdrop-filter: blur(14px) saturate(180%);
  -webkit-backdrop-filter: blur(14px) saturate(180%);
  border: 1px solid rgba(0, 102, 255, 0.18);
}
.v2-body .v2-btn--ghost:hover {
  background: rgba(255, 255, 255, 0.9);
  color: var(--r-blue);
  border-color: rgba(0, 102, 255, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(10, 30, 80, 0.08);
}

@keyframes v2-fadeup {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 滚动提示 */
.v2-scroll-hint {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 1.5px solid rgba(10, 10, 10, 0.18);
  border-radius: 14px;
  display: flex;
  justify-content: center;
  padding-top: 7px;
  cursor: pointer;
  transition: border-color 0.2s var(--tx);
}
.v2-scroll-hint:hover { border-color: var(--r-blue); }
.v2-scroll-hint span {
  width: 3px; height: 9px;
  background: rgba(10, 10, 10, 0.28);
  border-radius: 3px;
  animation: v2-scroll 2.2s ease-in-out infinite;
}
.v2-scroll-hint:hover span { background: var(--r-blue); }
@keyframes v2-scroll {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(16px); opacity: 0; }
}

/* ───────── Bento 业务展示 ───────── */
.v2-bento-section {
  padding: 64px 0 100px;
  background: transparent;
  overflow: hidden;
}

.v2-section-head {
  text-align: center;
  margin-bottom: 64px;
}

/* Apple 风 kicker: 不饱和深灰 + 中等字号 */
.v2-kicker {
  display: block;
  font-family: var(--font-cn);
  font-size: clamp(15px, 1.15vw, 17px);
  font-weight: 500;
  letter-spacing: 0;
  color: var(--r-muted);
  text-transform: none;
  margin-bottom: 14px;
  padding: 0;
}
.v2-kicker::before, .v2-kicker::after { display: none; }

.v2-section-title {
  font-size: clamp(34px, 4.6vw, 54px);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--r-black);
  margin: 0;
}
.v2-title-grad {
  background: linear-gradient(135deg, var(--r-blue) 0%, var(--r-aqua) 50%, var(--r-mint) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Bento 网格: 12 列 / 行高自动 */
.v2-bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: minmax(220px, auto);
  gap: 16px;
}

.v2-bento-card {
  position: relative;
  display: flex;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid rgba(10, 30, 80, 0.06);
  transform: perspective(1200px)
             rotateX(var(--tilt-rx, 0deg))
             rotateY(var(--tilt-ry, 0deg))
             translateZ(var(--tilt-tz, 0px))
             scale(var(--card-press, 1));
  transition: box-shadow 0.4s var(--tx), border-color 0.4s var(--tx);
  text-decoration: none;
  cursor: pointer;
  isolation: isolate;
  transform-style: preserve-3d;
  --shine-x: 50%;
  --shine-y: 50%;
  --card-press: 1;
  box-shadow: 0 4px 18px rgba(10, 30, 80, 0.04);
}

.v2-bento-card:hover {
  border-color: rgba(0, 102, 255, 0.22);
  box-shadow:
    0 32px 64px rgba(10, 30, 80, 0.16),
    0 14px 32px rgba(0, 102, 255, 0.08),
    inset 0 0 0 1px rgba(0, 102, 255, 0.12);
}

/* 点击反馈 (active 下压) */
.v2-bento-card:active {
  --card-press: 0.985;
  transition: transform 0.08s ease-out, box-shadow 0.4s var(--tx);
}

/* 鼠标位置驱动的光泽 */
.v2-bento-card::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
    circle at var(--shine-x) var(--shine-y),
    rgba(255, 255, 255, 0.45),
    rgba(255, 255, 255, 0) 38%
  );
  opacity: 0;
  transition: opacity 0.4s var(--tx);
  z-index: 5;
  border-radius: inherit;
  mix-blend-mode: overlay;
}
.v2-bento-card:hover::after {
  opacity: 1;
}

/* 卡内部:左右 / 上下结构通过 v2-bento-side + v2-bento-art 决定 */
.v2-bento-side {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 32px;
  position: relative;
  z-index: 2;
  gap: 8px;
}
.v2-bento-art {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
  padding: 20px;
}
.v2-bento-art img {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
  filter: drop-shadow(0 18px 32px rgba(10, 30, 80, 0.18));
  transition: transform 0.6s var(--tx);
}
.v2-bento-card:hover .v2-bento-art img {
  transform: scale(1.06) translateZ(20px);
}

.v2-bento-tag {
  display: inline-block;
  font-family: var(--font-cn);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--r-muted);
  text-transform: none;
  margin-bottom: 6px;
}
.v2-bento-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--r-title);
  margin: 0;
  letter-spacing: -0.015em;
  line-height: 1.2;
}
.v2-bento-desc {
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--r-muted);
  margin: 6px 0 0;
}
.v2-bento-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--r-blue);
  transition: gap 0.3s var(--tx), color 0.2s var(--tx);
}
.v2-bento-link svg {
  transition: transform 0.4s var(--tx-bounce);
}
.v2-bento-card:hover .v2-bento-link {
  gap: 14px;
  color: var(--r-blue-deep);
}
.v2-bento-card:hover .v2-bento-link svg {
  transform: translateX(4px);
}
.v2-bento-card:active .v2-bento-link svg {
  transform: translateX(8px);
}

/* ── 网格定位 ── */
/* 第 1 行: BidCore 大卡 (8 列) + 内训 (4 列) */
/* 第 2 行: BidCore 续行         + 知识库 (4 列) */
/* 第 3 行: 内容 (4 列) + 方法体系大卡 (8 列) */

.v2-bento-card--large.v2-bento-card--bidcore {
  grid-column: span 8;
  grid-row: span 2;
  flex-direction: row;
  align-items: stretch;
}
.v2-bento-card--large.v2-bento-card--bidcore .v2-bento-side {
  flex-basis: 46%;
  justify-content: flex-end;
  padding: 44px 40px;
}
.v2-bento-card--large.v2-bento-card--bidcore .v2-bento-art {
  flex: 1;
  padding: 32px;
}
.v2-bento-card--large.v2-bento-card--bidcore .v2-bento-title {
  font-size: 44px;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 4px;
}
.v2-bento-card--large.v2-bento-card--bidcore .v2-bento-desc {
  font-size: 15px;
  line-height: 1.75;
  max-width: 320px;
}

.v2-bento-card--training {
  grid-column: span 4;
  grid-row: span 1;
  flex-direction: column;
}
.v2-bento-card--knowledge {
  grid-column: span 4;
  grid-row: span 1;
  flex-direction: column;
}
.v2-bento-card--content {
  grid-column: span 4;
  grid-row: span 1;
  flex-direction: column;
}

.v2-bento-card--large.v2-bento-card--method {
  grid-column: span 8;
  grid-row: span 1;
  flex-direction: row;
  align-items: stretch;
  min-height: 280px;
}
.v2-bento-card--large.v2-bento-card--method .v2-bento-art {
  flex: 0.85;
  padding: 24px;
}
.v2-bento-card--large.v2-bento-card--method .v2-bento-side {
  flex-basis: 50%;
  padding: 36px 40px;
}
.v2-bento-card--large.v2-bento-card--method .v2-bento-title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

/* ── Liquid Glass 卡片 v2: 强 blur + 半透明,真透出 aurora ── */

.v2-bento-card {
  background:
    radial-gradient(circle at 100% 0%, rgba(255, 255, 255, 0.55), transparent 60%),
    rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(14px) saturate(180%) !important;
  -webkit-backdrop-filter: blur(14px) saturate(180%) !important;
}

/* BidCore 大卡 - 蓝光更强 */
.v2-bento-card--bidcore {
  background:
    radial-gradient(circle at 85% 20%, rgba(0, 102, 255, 0.32), transparent 55%),
    radial-gradient(circle at 18% 78%, rgba(0, 200, 230, 0.28), transparent 60%),
    rgba(255, 255, 255, 0.18);
}

/* 企业内训 - 蓝 */
.v2-bento-card--training {
  background:
    radial-gradient(circle at 80% 20%, rgba(0, 102, 255, 0.32), transparent 60%),
    rgba(255, 255, 255, 0.18);
}

/* 知识库 - 青 */
.v2-bento-card--knowledge {
  background:
    radial-gradient(circle at 80% 80%, rgba(0, 200, 230, 0.34), transparent 60%),
    rgba(255, 255, 255, 0.18);
}

/* 内容自动化 - 蓝青混合 */
.v2-bento-card--content {
  background:
    radial-gradient(circle at 20% 80%, rgba(0, 102, 255, 0.28), transparent 55%),
    radial-gradient(circle at 85% 25%, rgba(0, 200, 230, 0.28), transparent 55%),
    rgba(255, 255, 255, 0.18);
}

/* 方法体系大卡 - 双侧光晕 */
.v2-bento-card--method {
  background:
    radial-gradient(circle at 12% 50%, rgba(0, 200, 230, 0.34), transparent 55%),
    radial-gradient(circle at 88% 50%, rgba(0, 102, 255, 0.3), transparent 55%),
    rgba(255, 255, 255, 0.18);
}

/* 文字颜色保持深色,不反白 */
.v2-bento-tag { color: var(--r-blue); }
.v2-bento-title { color: var(--r-title); }
.v2-bento-desc { color: var(--r-muted); }
.v2-bento-link { color: var(--r-blue); }

/* ═══════════════════════════════════════════════════
   通用 v2-section
═══════════════════════════════════════════════════ */
.v2-section {
  padding: clamp(72px, 10vw, 140px) 0;
  position: relative;
  overflow: hidden;
}
.v2-section-head {
  margin-bottom: 64px;
  max-width: 720px;
}
.v2-section-head.left {
  margin-left: 0;
  margin-right: auto;
  text-align: left;
}
.v2-section-head.left .v2-section-title,
.v2-section-head.left .v2-section-lead,
.v2-section-head.left .v2-kicker {
  text-align: left;
}
.v2-section-head.center {
  margin-left: auto; margin-right: auto;
  text-align: center;
}
.v2-kicker-left {
  padding: 0;
}

.v2-section-lead {
  font-size: clamp(16px, 1.3vw, 19px);
  line-height: 1.75;
  color: var(--r-muted);
  margin: 18px 0 0;
  max-width: 600px;
}
.v2-section-head.center .v2-section-lead {
  margin-left: auto;
  margin-right: auto;
}

/* ───────── 痛点(大图 + 浮动 chip) ───────── */
.v2-problems { background: transparent; }
.v2-problems-stage {
  position: relative;
  margin: 64px auto 0;
  max-width: 1100px;
}
.v2-problems-art {
  margin: 0 auto;
  max-width: 720px;
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
}
.v2-problems-art img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 24px 48px rgba(0, 30, 80, 0.16));
  animation: v2-bob-soft 8s ease-in-out infinite;
}
@keyframes v2-bob-soft {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.v2-problem-chip {
  position: absolute;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 20px;
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(32px) saturate(180%);
  -webkit-backdrop-filter: blur(32px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 16px;
  box-shadow:
    0 12px 32px rgba(10, 30, 80, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.85);
  max-width: 220px;
  z-index: 2;
  transition: transform 0.4s var(--tx-bounce), box-shadow 0.4s var(--tx);
  cursor: default;
}
.v2-problem-chip:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 18px 44px rgba(10, 30, 80, 0.14);
}
.v2-problem-chip strong {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--r-title);
  letter-spacing: -0.01em;
}
.v2-problem-chip span {
  font-size: 13px;
  line-height: 1.55;
  color: var(--r-muted);
}

.v2-problem-chip--1 { top: 5%; left: 0%; animation: v2-bob-soft 7s ease-in-out infinite; }
.v2-problem-chip--2 { top: 8%; right: 0%; animation: v2-bob-soft 8s ease-in-out infinite reverse; animation-delay: -2s; }
.v2-problem-chip--3 { bottom: 12%; left: 2%; animation: v2-bob-soft 9s ease-in-out infinite; animation-delay: -3s; }
.v2-problem-chip--4 { bottom: 8%; right: 2%; animation: v2-bob-soft 7.5s ease-in-out infinite reverse; animation-delay: -4s; }

@media (max-width: 980px) {
  .v2-problems-stage { margin-top: 36px; }
  .v2-problem-chip { max-width: 180px; padding: 12px 16px; }
  .v2-problem-chip strong { font-size: 14px; }
  .v2-problem-chip span { font-size: 12px; }
  .v2-problem-chip--1 { top: -10px; left: -10px; }
  .v2-problem-chip--2 { top: -10px; right: -10px; }
  .v2-problem-chip--3 { bottom: -10px; left: -10px; }
  .v2-problem-chip--4 { bottom: -10px; right: -10px; }
}
@media (max-width: 640px) {
  .v2-problems-stage {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  .v2-problem-chip {
    position: static;
    max-width: none;
    animation: none;
  }
  .v2-problems-art { order: -1; max-width: 100%; aspect-ratio: 4 / 3; }
}

/* ───────── BidCore mini-bento ───────── */
.v2-bidcore-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: 280px auto;
  gap: 14px;
  margin-top: 48px;
}
.v2-bc-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 28px;
  background: rgba(255, 255, 255, 0.42);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 22px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.92),
    0 8px 24px rgba(10, 30, 80, 0.04);
  transition: transform 0.3s var(--tx), box-shadow 0.3s var(--tx), border-color 0.3s var(--tx);
}
.v2-bc-card:hover {
  transform: translateY(-3px);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.85),
    0 18px 44px rgba(0, 102, 255, 0.12);
  border-color: rgba(0, 102, 255, 0.22);
}
.v2-bc-card--hero {
  grid-column: span 4;
  grid-row: 1;
  flex-direction: row;
  padding: 0;
  align-items: stretch;
  overflow: hidden;
}
.v2-bc-art {
  flex: 1;
  display: flex; align-items: center; justify-content: center;
  padding: 30px;
}
.v2-bc-art img {
  max-width: 70%; max-height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 18px 36px rgba(0, 30, 80, 0.18));
}
.v2-bc-meta {
  flex: 1;
  display: flex; flex-direction: column;
  justify-content: center;
  padding: 36px 36px 36px 0;
}
.v2-bc-pill {
  display: inline-block;
  width: fit-content;
  padding: 6px 14px;
  background: rgba(0, 102, 255, 0.1);
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--r-blue);
  margin-bottom: 18px;
}
.v2-bc-meta h3 {
  font-size: clamp(22px, 2.2vw, 30px);
  font-weight: 700;
  color: var(--r-title);
  margin: 0;
  letter-spacing: -0.015em;
  line-height: 1.25;
}

.v2-bc-card h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--r-title);
  margin: 0 0 10px;
  letter-spacing: -0.005em;
  position: relative;
  padding-top: 12px;
}
.v2-bc-card h4::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 28px; height: 2px;
  background: linear-gradient(90deg, var(--r-blue), var(--r-aqua));
  border-radius: 2px;
}
.v2-bc-card p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--r-muted);
  margin: 0;
}
/* hero 大卡的 h3 不要那条线 */
.v2-bc-card--hero h3 {
  position: static;
  padding-top: 0;
}
.v2-bc-card--hero h3::before { display: none; }

.v2-product-actions--center {
  display: flex;
  justify-content: center;
  margin-top: 48px;
}

@media (max-width: 980px) {
  .v2-bidcore-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: auto auto auto;
  }
  .v2-bc-card--hero {
    grid-column: span 2;
    flex-direction: column;
  }
  .v2-bc-meta {
    padding: 0 32px 32px;
  }
}
@media (max-width: 640px) {
  .v2-bidcore-grid { grid-template-columns: 1fr; gap: 12px; }
  .v2-bc-card--hero { grid-column: span 1; }
  .v2-bc-card { padding: 22px; }
  .v2-bc-art { padding: 24px; }
  .v2-bc-meta { padding: 0 24px 24px; }
  .v2-bc-meta h3 { font-size: 22px; }
}

/* ───────── 内训课程矩阵 (无数字徽章) ───────── */
.v2-course-grid {
  list-style: none;
  margin: 48px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.v2-course-card {
  padding: 26px 28px;
  background: rgba(255, 255, 255, 0.42);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 18px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.85),
    0 6px 20px rgba(10, 30, 80, 0.04);
  transition: all 0.3s var(--tx);
}
.v2-course-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 102, 255, 0.22);
  box-shadow: 0 14px 32px rgba(0, 102, 255, 0.1);
}
.v2-course-card--wide {
  grid-column: span 3;
}
.v2-course-card h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--r-title);
  margin: 0 0 8px;
  letter-spacing: -0.005em;
  position: relative;
  padding-top: 14px;
}
.v2-course-card h4::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 24px; height: 2px;
  background: linear-gradient(90deg, var(--r-blue), var(--r-aqua));
  border-radius: 2px;
}
.v2-course-card p {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--r-muted);
  margin: 0;
}

@media (max-width: 980px) {
  .v2-course-grid { grid-template-columns: repeat(2, 1fr); }
  .v2-course-card--wide { grid-column: span 2; }
}
@media (max-width: 640px) {
  .v2-course-grid { grid-template-columns: 1fr; }
  .v2-course-card--wide { grid-column: span 1; }
}

/* ───────── 知识库整理 / 内容自动化 (kn-grid) ───────── */
.v2-kn-grid {
  list-style: none;
  margin: 48px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.v2-kn-card {
  padding: 32px 36px;
  background: rgba(255, 255, 255, 0.42);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 22px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.85),
    0 6px 20px rgba(10, 30, 80, 0.04);
  transition: all 0.3s var(--tx);
}
.v2-kn-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 102, 255, 0.22);
  box-shadow: 0 18px 40px rgba(0, 102, 255, 0.1);
}
.v2-kn-card h4 {
  font-size: 19px;
  font-weight: 700;
  color: var(--r-title);
  margin: 0 0 12px;
  letter-spacing: -0.005em;
  position: relative;
  padding-top: 16px;
}
.v2-kn-card h4::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 28px; height: 2px;
  background: linear-gradient(90deg, var(--r-blue), var(--r-aqua));
  border-radius: 2px;
}
.v2-kn-card p {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--r-muted);
  margin: 0;
}

@media (max-width: 640px) {
  .v2-kn-grid { grid-template-columns: 1fr; gap: 12px; }
  .v2-kn-card { padding: 24px 26px; }
}

/* ───────── 方法体系 (垂直 timeline + sticky 大字) ───────── */
.v2-method {
  background: transparent;
}
.v2-method-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(40px, 6vw, 96px);
  align-items: start;
}
.v2-method-side {
  position: sticky;
  top: 100px;
}
.v2-method-side .v2-section-lead {
  margin-top: 22px;
}

.v2-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
/* 垂直渐变线 */
.v2-timeline::before {
  content: "";
  position: absolute;
  left: 28px;
  top: 28px;
  bottom: 28px;
  width: 2px;
  background: linear-gradient(180deg,
    var(--r-blue) 0%,
    var(--r-aqua) 35%,
    var(--r-mint) 70%,
    transparent 100%);
  opacity: 0.4;
}
.v2-timeline-step {
  position: relative;
  padding: 0 0 56px 84px;
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--tx), transform 0.7s var(--tx-bounce);
}
.v2-timeline-step.is-in {
  opacity: 1;
  transform: translateY(0);
}
.v2-timeline-step:last-child {
  padding-bottom: 0;
}

.v2-timeline-num {
  position: absolute;
  left: 0; top: 0;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--r-blue) 0%, var(--r-aqua) 100%);
  color: #fff;
  font-family: var(--font-en);
  font-size: 16px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow:
    0 8px 24px rgba(0, 102, 255, 0.3),
    0 0 0 6px rgba(255, 255, 255, 0.6),
    0 0 0 7px rgba(0, 102, 255, 0.08);
  z-index: 1;
}

.v2-timeline-text h3 {
  font-size: clamp(22px, 2vw, 28px);
  font-weight: 700;
  color: var(--r-title);
  margin: 8px 0 12px;
  letter-spacing: -0.01em;
}
.v2-timeline-text p {
  font-size: clamp(15px, 1.1vw, 16.5px);
  line-height: 1.75;
  color: var(--r-muted);
  margin: 0;
  max-width: 520px;
}

@media (max-width: 980px) {
  .v2-method-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .v2-method-side { position: static; }
}
@media (max-width: 640px) {
  .v2-timeline-step { padding: 0 0 40px 64px; }
  .v2-timeline::before { left: 21px; top: 22px; bottom: 22px; }
  .v2-timeline-num { width: 44px; height: 44px; font-size: 14px; }
  .v2-timeline-text h3 { font-size: 19px; margin-top: 4px; }
}

/* ───────── 产品/服务详情 (BidCore / 内训 共享) ───────── */
.v2-product-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
}
.v2-product-grid--reverse {
  direction: rtl;
}
.v2-product-grid--reverse > * {
  direction: ltr;
}
.v2-product-art {
  position: relative;
  aspect-ratio: 16 / 11;
  border-radius: 32px;
  /* 淡淡的渐变磨砂玻璃底纹 - 极低饱和度,让玻璃图主导色彩 */
  background:
    linear-gradient(140deg, rgba(255, 255, 255, 0.6) 0%, rgba(238, 242, 247, 0.4) 50%, rgba(229, 236, 244, 0.45) 100%);
  backdrop-filter: blur(28px) saturate(160%);
  -webkit-backdrop-filter: blur(28px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.85),
    inset 0 -1px 0 rgba(0, 102, 255, 0.04),
    0 18px 48px rgba(10, 30, 80, 0.06),
    0 4px 12px rgba(10, 30, 80, 0.03);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6%;
}
/* 顶部柔和高光让玻璃箱有立体感 */
.v2-product-art::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; height: 50%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.5), transparent);
  pointer-events: none;
  border-radius: 32px 32px 0 0;
}
.v2-product-art img {
  position: relative;
  z-index: 1;
  max-width: 80%;
  max-height: 80%;
  object-fit: contain;
  filter: drop-shadow(0 20px 36px rgba(0, 30, 80, 0.2));
}
.v2-product-text .v2-section-title {
  margin-top: 12px;
}
.v2-feature-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px 18px;
}
.v2-feature-list li {
  position: relative;
  padding-left: 24px;
  font-size: 14.5px;
  color: var(--r-body);
  line-height: 1.6;
}
.v2-feature-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 7px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background:
    radial-gradient(circle, var(--r-aqua) 30%, transparent 32%),
    radial-gradient(circle, rgba(0, 200, 230, 0.2) 70%, transparent 72%);
}
.v2-product-actions { margin-top: 36px; }
.v2-product-actions--center {
  display: flex;
  justify-content: flex-start;
  margin-top: 48px;
}

.v2-product--training,
.v2-product--knowledge,
.v2-product--content {
  background: transparent;
}

/* ───────── 关于壬合 (大字 / 逐字丝滑浮入) ───────── */
.v2-about {
  background: transparent;
}
.v2-about-narrative {
  max-width: 1100px;
  margin: 0 auto;
}
.v2-about-narrative .v2-kicker {
  margin-bottom: 28px;
}
.v2-about-headline {
  font-size: clamp(40px, 6.5vw, 88px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--r-title);
  margin: 0;
}
.v2-about-row {
  display: block;
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--tx), transform 0.9s var(--tx-bounce);
}
.v2-about-row:nth-child(1) { transition-delay: 0s; }
.v2-about-row:nth-child(2) { transition-delay: 0.25s; }
.v2-about-narrative.is-in .v2-about-row {
  opacity: 1;
  transform: translateY(0);
}
.v2-about-row--grad {
  background: linear-gradient(135deg,
    var(--r-blue) 0%,
    var(--r-aqua) 45%,
    var(--r-mint) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

@media (max-width: 640px) {
  .v2-about-headline {
    font-size: clamp(34px, 9vw, 52px);
  }
}

/* ───────── 联系沟通 ───────── */
.v2-contact {
  background: transparent;
}
.v2-contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: clamp(40px, 6vw, 72px);
  align-items: start;
}
.v2-contact-types {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.v2-contact-types li {
  padding: 8px 16px;
  background: rgba(0, 102, 255, 0.08);
  color: var(--r-blue);
  font-size: 13px;
  font-weight: 500;
  border-radius: 999px;
}

/* 玻璃质感表单 */
.v2-form {
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 24px;
  padding: 36px;
  box-shadow: 0 24px 64px rgba(10, 30, 80, 0.08);
}
.v2-field { margin-bottom: 18px; position: relative; }
.v2-field label {
  display: block;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--r-title);
  margin-bottom: 8px;
}
.v2-req { color: #E5484D; margin-left: 2px; }
.v2-field input,
.v2-field select,
.v2-field textarea {
  width: 100%;
  font: inherit;
  font-size: 14.5px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(10, 30, 80, 0.1);
  border-radius: 10px;
  color: var(--r-title);
  outline: none;
  transition: border-color 0.2s var(--tx), box-shadow 0.2s var(--tx), background 0.2s var(--tx);
  font-family: inherit;
}
.v2-field textarea { resize: vertical; min-height: 110px; line-height: 1.6; }
.v2-field input:focus,
.v2-field select:focus,
.v2-field textarea:focus {
  border-color: var(--r-blue);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.15);
}
.v2-field--hp { position: absolute; left: -9999px; opacity: 0; pointer-events: none; }
.v2-form-actions { margin-top: 24px; }
.v2-btn--block { width: 100%; padding: 16px 28px; }
.v2-form-tip {
  margin: 14px 0 0;
  font-size: 13.5px;
  text-align: center;
  min-height: 20px;
  color: var(--r-muted);
}
.v2-form-tip.success { color: #1F8A4C; }
.v2-form-tip.error { color: #E5484D; }

/* ═══════════════════════════════════════════════════
   响应式: 桌面 (>1199 默认) / 平板 / 手机
═══════════════════════════════════════════════════ */

/* 平板 */
@media (max-width: 1199px) {
  .v2-bento-card--large.v2-bento-card--bidcore .v2-bento-title { font-size: 36px; }
  .v2-method-steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  .v2-method-steps::before { display: none; }
}

@media (max-width: 980px) {
  .v2-primary { display: none; }
  .v2-cta-btn { display: none; }

  .v2-hero { padding: 100px 20px 70px; }

  /* Bento: 大卡变单列 */
  .v2-bento {
    grid-template-columns: repeat(6, 1fr);
  }
  .v2-bento-card--large.v2-bento-card--bidcore {
    grid-column: span 6;
    grid-row: span 1;
    flex-direction: column;
  }
  .v2-bento-card--large.v2-bento-card--bidcore .v2-bento-side {
    flex-basis: auto;
    padding: 32px;
  }
  .v2-bento-card--large.v2-bento-card--bidcore .v2-bento-art {
    flex: 1;
    min-height: 240px;
  }
  .v2-bento-card--training,
  .v2-bento-card--knowledge,
  .v2-bento-card--content {
    grid-column: span 3;
  }
  .v2-bento-card--large.v2-bento-card--method {
    grid-column: span 6;
    flex-direction: row;
  }

  /* 痛点 */
  .v2-problem-list {
    grid-template-columns: 1fr;
  }

  /* 方法体系 */
  .v2-method-steps {
    grid-template-columns: repeat(2, 1fr);
  }

  /* 产品详情 */
  .v2-product-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .v2-product-grid--reverse {
    direction: ltr;
  }
  .v2-product-grid--reverse .v2-product-art {
    order: -1;
  }

  /* 联系 */
  .v2-contact-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  /* Footer */
  .v2-footer-top {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

/* 手机 */
@media (max-width: 640px) {
  .v2-nav { gap: 12px; }
  .v2-brand-text small { display: none; }

  .v2-hero { padding: 88px 18px 50px; min-height: auto; }
  .v2-hero-title { font-size: clamp(38px, 11vw, 56px); }
  .v2-hero-sub { color: var(--r-body); font-weight: 500; }
  .v2-hero-rhythm {
    gap: 4px 14px;
    font-size: 13.5px;
    color: var(--r-body);
    font-weight: 600;
  }
  .v2-hero-actions { width: 100%; }
  .v2-body .v2-btn { padding: 14px 24px; font-size: 14.5px; flex: 1; }
  .v2-scroll-hint { display: none; }

  /* 手机端 aurora 降饱和度 + 缩小,避免淹没文字 */
  .v2-aurora--1 { width: 480px; height: 480px; opacity: 0.55; }
  .v2-aurora--2 { width: 420px; height: 420px; opacity: 0.5; }
  .v2-aurora--3 { width: 380px; height: 380px; opacity: 0.5; }
  .v2-aurora--4 { display: none; }

  /* Bento: 横向 snap scroll carousel */
  .v2-bento {
    display: flex;
    grid-template-columns: none;
    grid-auto-rows: auto;
    gap: 14px;
    overflow-x: auto;
    overflow-y: visible;
    scroll-snap-type: x mandatory;
    scroll-padding: 18px;
    padding: 6px 18px 16px;
    margin: 0 -18px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .v2-bento::-webkit-scrollbar { display: none; }

  .v2-bento-card {
    flex: 0 0 280px;
    scroll-snap-align: start;
    grid-column: unset !important;
    grid-row: unset !important;
    flex-direction: column;
  }
  .v2-bento-card--large.v2-bento-card--bidcore,
  .v2-bento-card--large.v2-bento-card--method {
    flex: 0 0 320px;
    flex-direction: column;
  }
  .v2-bento-card--large.v2-bento-card--bidcore .v2-bento-side,
  .v2-bento-card--large.v2-bento-card--method .v2-bento-side {
    flex-basis: auto;
    padding: 24px;
  }
  .v2-bento-card--large.v2-bento-card--bidcore .v2-bento-art,
  .v2-bento-card--large.v2-bento-card--method .v2-bento-art {
    min-height: 180px;
    padding: 16px;
  }
  .v2-bento-card--large.v2-bento-card--bidcore .v2-bento-title { font-size: 28px; }
  .v2-bento-card--large.v2-bento-card--method .v2-bento-title { font-size: 24px; }
  .v2-bento-side { padding: 20px; }
  .v2-bento-card .v2-bento-art { min-height: 180px; }

  /* 滑动指示 */
  .v2-bento-section .v2-section-head {
    margin-bottom: 28px;
  }

  /* 各 section padding 收紧 */
  .v2-section { padding: 56px 0; }
  .v2-section-head { margin-bottom: 36px; }

  /* 手机端长段落改左对齐(避免最后一行单字居中难看) */
  .v2-section-lead,
  .v2-section-head.center .v2-section-lead,
  .v2-method-step p,
  .v2-problem-item p,
  .v2-about-text,
  .v2-bento-desc,
  .v2-product-text .v2-section-lead {
    text-align: left;
  }

  /* 标题在手机端可以保持居中(短)或左对齐 */
  .v2-section-head.center .v2-section-title { text-align: center; }
  .v2-about-title { text-align: center; }

  /* 痛点 */
  .v2-problem-item { padding: 24px 22px; gap: 14px; }
  .v2-problem-num { font-size: 26px; }
  .v2-problem-item h3 { font-size: 17px; }

  /* 方法体系 */
  .v2-method-steps {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .v2-method-step { padding: 22px 20px; }
  .v2-step-num { width: 44px; height: 44px; font-size: 14px; margin-bottom: 14px; }

  /* 产品详情 */
  .v2-product-art { aspect-ratio: 4 / 3; border-radius: 22px; }
  .v2-feature-list {
    grid-template-columns: 1fr;
    gap: 8px 14px;
  }

  /* 关于 */
  .v2-about-title { font-size: clamp(28px, 8.5vw, 38px); }

  /* 联系 */
  .v2-form { padding: 26px 22px; border-radius: 20px; }

  /* Footer */
  .v2-footer-cols {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .v2-footer-status {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .v2-footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

/* ───────── Footer (黑色区) ───────── */
.v2-footer {
  background: linear-gradient(180deg, #0A0A0A 0%, #050505 100%);
  color: rgba(255, 255, 255, 0.7);
  padding: 72px 0 36px;
  position: relative;
  overflow: hidden;
}
.v2-footer::before {
  content: "";
  position: absolute;
  top: -200px; right: -100px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(0, 102, 255, 0.12), transparent 65%);
  filter: blur(80px);
  pointer-events: none;
}
.v2-footer::after {
  content: "";
  position: absolute;
  bottom: -200px; left: -100px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(66, 224, 196, 0.06), transparent 65%);
  filter: blur(80px);
  pointer-events: none;
}

.v2-footer-top {
  display: grid;
  grid-template-columns: 1.4fr 2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  position: relative;
  z-index: 1;
}

.v2-footer-brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.v2-footer-mark { width: 44px; height: 32px; }
.v2-footer-name {
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.v2-footer-cn {
  font-size: 19px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.04em;
}
.v2-footer-en {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.22em;
}
.v2-footer-slogan {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.5);
  margin: 0;
  line-height: 1.6;
  max-width: 280px;
}

.v2-footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.v2-footer-col h4 {
  font-size: 13px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.92);
  margin: 0 0 16px;
  letter-spacing: 0.02em;
}
.v2-footer-col a, .v2-footer-col span {
  display: block;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  margin-bottom: 10px;
  transition: color 0.2s var(--tx);
  cursor: pointer;
}
.v2-footer-col a:hover {
  color: #fff;
}
.v2-footer-muted {
  cursor: default !important;
  color: rgba(255, 255, 255, 0.32) !important;
  font-style: italic;
}

/* 筹建状态条 (低调) */
.v2-footer-status {
  margin-top: 32px;
  padding: 16px 22px;
  display: flex;
  gap: 16px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.v2-footer-status-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0;
  background: transparent;
  border: 0;
  font-family: var(--font-cn);
  font-size: 12px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.04em;
  text-transform: none;
  white-space: nowrap;
}
.v2-footer-status-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  box-shadow: none;
  animation: v2-pulse-dim 3s ease-in-out infinite;
}
@keyframes v2-pulse-dim {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 0.85; }
}
.v2-footer-status p {
  margin: 0;
  font-size: 12px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.4);
}

.v2-footer-bottom {
  margin-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  position: relative;
  z-index: 1;
}
.v2-footer-copy {
  font-family: var(--font-en);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.35);
  letter-spacing: 0.02em;
}
.v2-footer-tag-line {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.32);
  letter-spacing: 0.12em;
}

@media (max-width: 720px) {
  .v2-footer-top {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .v2-footer-cols {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .v2-footer-status {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .v2-footer-bottom {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }
}

/* ───────── 响应式 ───────── */
@media (max-width: 980px) {
  .v2-primary { display: none; }

  .v2-hero { padding: 100px 20px 70px; }

  .v2-bento {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: auto;
  }
  .v2-bento-card--large {
    grid-column: span 2;
    grid-row: auto;
  }
  .v2-bento-card:not(.v2-bento-card--large) {
    grid-column: span 1;
  }
  .v2-bento-card--method {
    grid-column: span 2;
  }
}

@media (max-width: 640px) {
  .v2-hero-title { font-size: clamp(40px, 11vw, 60px); }
  .v2-hero-rhythm { gap: 4px 12px; font-size: 15.5px; }
  .v2-hero-actions { width: 100%; }
  .v2-btn { padding: 14px 24px; font-size: 14.5px; flex: 1; }

  .v2-bento {
    grid-template-columns: 1fr;
  }
  .v2-bento-card--large,
  .v2-bento-card:not(.v2-bento-card--large),
  .v2-bento-card--method {
    grid-column: span 1;
  }

  .v2-bento-section { padding: 80px 0 100px; }
  .v2-section-head { margin-bottom: 44px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ═══════════════════════════════════════════════════
   子页 sub-hero / 返回按钮 / CTA section
═══════════════════════════════════════════════════ */
.v2-subhero {
  padding: clamp(160px, 18vw, 220px) 24px clamp(60px, 7vw, 100px);
  position: relative;
  overflow: hidden;
}
.v2-subhero .v2-container {
  max-width: 1100px;
  margin: 0 auto;
  text-align: left;
  position: relative;
  z-index: 5;
}
/* 子页装饰图 (大图 + 慢动,文字 max-width 防压) */
.v2-subhero-decor {
  position: absolute;
  top: 50%;
  right: -6%;
  transform: translateY(-50%);
  width: clamp(360px, 44vw, 560px);
  aspect-ratio: 1 / 1;
  pointer-events: none;
  z-index: 1;
  opacity: 0.7;
}
.v2-subhero-decor img {
  width: 100%; height: 100%;
  object-fit: contain;
  filter: saturate(0.7) brightness(1.05) opacity(0.65);
  animation: v2-decor-drift 14s ease-in-out infinite;
}
@keyframes v2-decor-drift {
  0%, 100% { transform: translateY(0) rotate(-2deg) scale(1); }
  33% { transform: translateY(-22px) rotate(1deg) scale(1.02); }
  66% { transform: translateY(14px) rotate(-1deg) scale(0.99); }
}
/* 文字限宽,避开右侧装饰图 */
.v2-subhero h1,
.v2-subhero .lead {
  max-width: min(640px, 64%);
}

.v2-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  font-size: 14px;
  color: var(--r-muted);
  text-decoration: none;
  margin: 0 0 36px;
  padding: 8px 16px 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(10, 30, 80, 0.06);
  backdrop-filter: blur(14px) saturate(180%);
  -webkit-backdrop-filter: blur(14px) saturate(180%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.85),
    0 4px 14px rgba(10, 30, 80, 0.04);
  transition: gap 0.2s var(--tx), color 0.2s var(--tx), background 0.2s var(--tx), border-color 0.2s var(--tx);
}
.v2-back:hover {
  color: var(--r-blue);
  gap: 12px;
  background: rgba(255, 255, 255, 0.95);
  border-color: rgba(0, 102, 255, 0.22);
}

.v2-subhero .v2-kicker {
  margin-top: 0;
  margin-bottom: 14px;
}
.v2-subhero h1 {
  font-size: clamp(40px, 6.4vw, 88px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.035em;
  color: var(--r-title);
  margin: 0 0 28px;
  max-width: 900px;
}
.v2-subhero h1 .grad {
  background: linear-gradient(135deg, var(--r-blue) 0%, var(--r-aqua) 50%, var(--r-mint) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.v2-subhero .lead {
  font-size: clamp(16px, 1.35vw, 20px);
  line-height: 1.75;
  color: var(--r-muted);
  margin: 0;
  max-width: 640px;
}

@media (max-width: 980px) {
  .v2-subhero-decor {
    right: -25%;
    width: 70vw;
    opacity: 0.5;
  }
}
@media (max-width: 640px) {
  .v2-subhero { padding: 96px 18px 56px; }
  .v2-subhero h1 { font-size: clamp(32px, 9vw, 48px); }
  .v2-subhero-decor {
    top: auto;
    bottom: -6%;
    right: -30%;
    transform: none;
    width: 90vw;
    opacity: 0.32;
  }
}

.v2-cta-section {
  padding: clamp(80px, 10vw, 140px) 24px clamp(120px, 14vw, 180px);
  text-align: center;
}
.v2-cta-section .v2-container { max-width: 760px; margin: 0 auto; }
.v2-cta-section h2 {
  font-size: clamp(34px, 5vw, 60px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.025em;
  color: var(--r-title);
  margin: 0 0 16px;
}
.v2-cta-section h2 .grad {
  background: linear-gradient(135deg, var(--r-blue) 0%, var(--r-aqua) 50%, var(--r-mint) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.v2-cta-section p {
  font-size: clamp(16px, 1.2vw, 18px);
  line-height: 1.7;
  color: var(--r-muted);
  margin: 0 0 36px;
}
.v2-cta-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}
@media (max-width: 640px) {
  .v2-cta-section { padding: 64px 18px 88px; }
}

/* ═══════════════════════════════════════════════════
   主页背景模糊 + Liquid Glass 卡片增强
═══════════════════════════════════════════════════ */

/* 让 aurora 全局背景更梦幻(轻微模糊主体内容下方的光晕) */
.v2-hero-bg {
  filter: saturate(110%);
}
.v2-aurora {
  filter: blur(140px);  /* 加强 blur (原 120px) */
}

/* Bento 卡: 升级 Liquid Glass 风 */
.v2-bento-card {
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.7);
}
.v2-bento-card--bidcore,
.v2-bento-card--training,
.v2-bento-card--knowledge,
.v2-bento-card--content,
.v2-bento-card--method {
  /* 原 background 保留 + 加强半透明感 */
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.85),
    inset 0 -1px 0 rgba(0, 102, 255, 0.05),
    0 8px 24px rgba(10, 30, 80, 0.06);
}
.v2-bento-card:hover {
  border-color: rgba(0, 102, 255, 0.32);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 0 0 1px rgba(0, 102, 255, 0.14),
    0 32px 64px rgba(10, 30, 80, 0.16),
    0 14px 32px rgba(0, 102, 255, 0.1) !important;
}

/* mini-bento 卡 + course 卡 + kn 卡 + 痛点 chip 都升级 Liquid Glass v2 */
.v2-bc-card,
.v2-course-card,
.v2-kn-card,
.v2-problem-chip,
.v2-method-step,
.v2-timeline-step {
  background: rgba(255, 255, 255, 0.32) !important;
  backdrop-filter: blur(14px) saturate(180%) !important;
  -webkit-backdrop-filter: blur(14px) saturate(180%) !important;
  border: 1px solid rgba(255, 255, 255, 0.65) !important;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.92),
    inset 0 -1px 0 rgba(0, 102, 255, 0.06),
    0 6px 20px rgba(10, 30, 80, 0.06) !important;
}
.v2-bc-card:hover,
.v2-course-card:hover,
.v2-kn-card:hover,
.v2-problem-chip:hover,
.v2-method-step:hover {
  border-color: rgba(0, 102, 255, 0.28) !important;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 0 0 1px rgba(0, 102, 255, 0.12),
    0 18px 44px rgba(0, 102, 255, 0.12) !important;
}

/* 表单也升级 Liquid Glass */
.v2-form {
  backdrop-filter: blur(32px) saturate(180%);
  -webkit-backdrop-filter: blur(32px) saturate(180%);
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.75);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.92),
    0 24px 64px rgba(10, 30, 80, 0.1);
}