/* mirror_flow:p6_ai_generated */
/* ===== CSS Custom Properties ===== */
:root {
  /* Primary Palette - Green (新能源/环保) */
  --color-primary-50: #e6f7ee;
  --color-primary-100: #b3e8cc;
  --color-primary-200: #80d9aa;
  --color-primary-300: #4dc988;
  --color-primary-400: #26ba6b;
  --color-primary-500: #0da855;
  --color-primary-600: #0a8f44;
  --color-primary-700: #077635;
  --color-primary-800: #055d28;
  --color-primary-900: #03441c;

  /* Secondary Palette - Blue (科技/清洁) */
  --color-secondary-50: #e8f4fd;
  --color-secondary-100: #bde0f8;
  --color-secondary-200: #92ccf3;
  --color-secondary-300: #67b8ee;
  --color-secondary-400: #3da4e9;
  --color-secondary-500: #1a90e0;
  --color-secondary-600: #1678bd;
  --color-secondary-700: #12609a;
  --color-secondary-800: #0e4877;
  --color-secondary-900: #0a3054;

  /* Accent - Gold/Warm */
  --color-accent-50: #fffbe6;
  --color-accent-100: #fff3b3;
  --color-accent-200: #ffeb80;
  --color-accent-300: #ffe34d;
  --color-accent-400: #ffdb1a;
  --color-accent-500: #e6c200;
  --color-accent-600: #b39800;
  --color-accent-700: #806d00;
  --color-accent-800: #4d4100;
  --color-accent-900: #1a1600;

  /* Neutral Palette */
  --color-neutral-50: #f8faf9;
  --color-neutral-100: #f0f4f2;
  --color-neutral-200: #dde5e0;
  --color-neutral-300: #c1cdc5;
  --color-neutral-400: #9aada1;
  --color-neutral-500: #738b7c;
  --color-neutral-600: #5b6f63;
  --color-neutral-700: #43534a;
  --color-neutral-800: #2b3831;
  --color-neutral-900: #141c18;

  /* Semantic Colors */
  --color-success: #0da855;
  --color-warning: #e6c200;
  --color-error: #d93030;
  --color-info: #1a90e0;

  /* Typography */
  --font-family-base: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --font-family-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --font-family-mono: 'SF Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;

  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.25;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;

  /* Spacing Scale */
  --space-0: 0;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.1), 0 8px 20px rgba(0, 0, 0, 0.05);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Layout */
  --container-max: 1200px;
  --container-padding: var(--space-6);
  --header-height: 72px;
}

/* ===== CSS Reset & Base ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-neutral-800);
  background-color: #ffffff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

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

a {
  color: var(--color-primary-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-700);
}

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-neutral-900);
}

h1 {
  font-size: var(--font-size-5xl);
}

h2 {
  font-size: var(--font-size-4xl);
}

h3 {
  font-size: var(--font-size-3xl);
}

h4 {
  font-size: var(--font-size-2xl);
}

h5 {
  font-size: var(--font-size-xl);
}

h6 {
  font-size: var(--font-size-lg);
}

p {
  margin-bottom: var(--space-4);
}

strong {
  font-weight: var(--font-weight-semibold);
}

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.container--narrow {
  max-width: 800px;
}

.container--wide {
  max-width: 1400px;
}

/* ===== Header / Navigation ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-neutral-200);
  display: flex;
  align-items: center;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.header-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.header-logo img {
  height: 40px;
  width: auto;
}

.header-logo span {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-700);
  white-space: nowrap;
}

.nav-main {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-neutral-700);
  transition: all var(--transition-fast);
}

.nav-list a:hover {
  color: var(--color-primary-600);
  background-color: var(--color-primary-50);
}

.nav-list a.active {
  color: var(--color-primary-600);
  background-color: var(--color-primary-50);
  font-weight: var(--font-weight-semibold);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Mobile Menu Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-neutral-700);
  border-radius: 2px;
  transition: all var(--transition-base);
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  padding: var(--space-24) 0;
  background: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-secondary-50) 50%, #ffffff 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(13, 168, 85, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.hero__content {
  max-width: 560px;
}

.hero__subtitle {
  display: inline-block;
  padding: var(--space-1) var(--space-4);
  margin-bottom: var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary-700);
  background-color: var(--color-primary-100);
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
}

.hero__title {
  font-size: var(--font-size-6xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-6);
  line-height: 1.15;
}

.hero__title span {
  color: var(--color-primary-600);
}

.hero__description {
  font-size: var(--font-size-lg);
  color: var(--color-neutral-600);
  margin-bottom: var(--space-8);
  line-height: var(--line-height-relaxed);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

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

.hero__image img {
  max-width: 100%;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
}

/* ===== Section Styles ===== */
.section {
  padding: var(--space-24) 0;
}

.section--alt {
  background-color: var(--color-neutral-50);
}

.section--primary-bg {
  background: linear-gradient(180deg, var(--color-primary-600) 0%, var(--color-primary-700) 100%);
  color: #ffffff;
}

.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto var(--space-16) auto;
}

.section-header__label {
  display: inline-block;
  padding: var(--space-1) var(--space-4);
  margin-bottom: var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary-600);
  background-color: var(--color-primary-50);
  border-radius: var(--radius-full);
}

.section-header__title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-4);
}

.section-header__description {
  font-size: var(--font-size-lg);
  color: var(--color-neutral-500);
  line-height: var(--line-height-relaxed);
}

.section--primary-bg .section-header__label {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.15);
}

.section--primary-bg .section-header__title {
  color: #ffffff;
}

.section--primary-bg .section-header__description {
  color: rgba(255, 255, 255, 0.8);
}

/* ===== Grid System ===== */
.grid {
  display: grid;
  gap: var(--space-8);
}

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

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

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

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

/* ===== Card Component ===== */
.card {
  background: #ffffff;
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.card:hover {
  border-color: var(--color-primary-200);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color